Mitsubishi Melsec-f User manual

⑥[BFM #20] Initialize: When K1 is written in BFM #20, all values will be initialized to the factory-settings.

(Note that the BFM #20 data will override the BFM #21 data.) This initialize function is convenient if you have an

error in adjustment.

⑦[BFM #21] I/O characteristics adjustment inhibit: Setting BFM #21 to 2 inhibits the user from inadvertent

adjustment of I/O characteristics. The adjustment inhibit function, once set, will be valid until the Permit command

(BFM #21=1) is set. The initial value is 1 (Permit). The set value will be retained even after power-off.

Offset data

Gain value

Item Voltage output Current output

Analog output

range -10VDC to +10V DC (External load resistance:2k to

1M ) DC 0mA to +20mA (External load resistance:500 )

Digital input 16 bits, binary, with sign (Effective bits for numeric value:11 bits and sign bit (1 bit))

Resolution 5mV (10V 1/2000) 20 A (20mA 1/1000)

Total accuracy 1% (at full scale of +10V) 1% (at full scale of +20mA)

Conversion speed 2.1ms for 4 channels (Change in the number of channels used will not change the conversion speed.)

Isolation Photo-coupler isolation between analog and digtital circuits.

DC/DC converter isolation of power from FX base unit.

No isolation between analog channels.

External power

supply DC 24V 10% 200mA

Number of

occupied I/O

points 8 points taken from the FX expansion bus (can be either inputs or outputs)

Power

consumption 5V, 30mA (Internal power supply from MPU or powered extension unit)

I/O

characteristics

(Default: Mode0)

Follow the

procedure

described in

section 8 to

change.

Mode 0 (Voltage

output:-10V to +10V) At load resistance of

10k Mode 1 (Current

output:+4mA to +20mA) At load resistance of

250

Mode 2 (Current

output:0mA to +20mA) At load resistance of

250

BFM

#8(E) Offset/gain setting command CH1, CH2 Initial value H0000

#9(E) Offset/gain setting command CH3, CH4 Initial value H0000

#10 Offset data CH1 *1

Unit:mV or A

Initial offset value:0

Initial gain value:+5,000

#11 Gain data CH1 *2

#12 Offset data CH2 *1

#13 Gain data CH2 *2

#14 Offset data CH3 *1

#15 Gain data CH3 *2

#16 Offset data CH4 *1

#17 Gain data CH4 *2

#18, #19 Reserved

W#20(E) Initialize, initial value = 0

#21 E I/O characteristics adjustment inhibit (Initial value 1)

#22 #28 Reserved

#29 Error status

#30 K3020 identification code

#31 Reserved

●Weight: Approx. 0.3 kg ●Accessory: Special block number label

①Extension cable

②Power indicator lamp (LED)

5V power is supplied from the programmable

controller to light this indicator lamp.

③Power supply terminals

(Screw terminal: M3.5(0.14))

④Analog output terminals

(Screw terminals : M3.5 (0.14))

⑤24V power indicator lamp (LED)

24V DC power is supplied to the terminals of the FX-4DA

to light this indicator lamp.

⑥D-A conversion indicator lamp (LED)

Flashes at a high speed if D-A conversion is

performing without a problem.

⑦Hole for direct mounting (2-φ5.5) (0.22)

⑧Groove for DIN rail mounting

(Width of DIN rail : 35 mm 1.38")

⑨Hook for DIN rail

FX-4DA

SPECIAL FUNCTION BLOCK

USER'S GUIDE

JY992D61001B

This manual contains text, diagrams and explanations which will guide the reader in the correct installation and

operation of the FX-4DA special function block and should be read and understood before attempting to install

or use the unit.

Further information can be found in the FX PROGRAMMING MANUAL and FX SERIES HARDWARE MANUAL.

CONNECTION TO PROGRAMMABLE CONTROLLER

Various special blocks controlled by the FROM/TO commands, such as the analog input blocks high-speed

counter blocks, etc. can be connected to the FX or FX2C programmable controller (MPU), or connected to the

right side of the other extension blocks or units. Up to eight special blocks can be connected to a single MPU in

the numeric order of No. 0 to No. 7.

ENVIRONMENT SPECIFICATIONS

The environment specifications are the same as those for the MPU of the programmable controller. Refer to the

FX-series Hardware Manual.

PERFORMANCE SPECIFICATIONS

DC24V±10%200mA

FX-4DA

V+

V-

I+

I-

V+

V-

I+

I-

*1 *2

Mixedoutputfromthesamechannelisnotpossible.

*3 Inverter,etc.

Extension cable

Class 3

Grounding

(100Ωor less) P C

Current output

Recorder,etc.

Commands sent from the programmable controller can

change the mode. The voltage/current output mode

selected will determine the output terminals used.

POWER

RUN

BATT.V

PROG¥E

CPU¥E

L N 24+ 24+ R UN X1 X3 X5 X7 X11 X13 X15 X17 X21 X23 X25 X27

COM X0 X2 X4 X6 X10 X12 X14 X16 X20 X22 X24 X26COM

`bWT `QUSu

Y0 Y2

COM1 Y1 Y3 COM2

Y7 COM3

Y10

Y11

Y12

Y13 COM4

Y14

Y15

Y16

Y17

Y20

Y21

Y22

Y23

Y24

Y25

Y26

Y27COM5

POWER

S/S

X4 X6

X5 X7

24V

A-D

POWER

READY

CH1

OFFSET

GAIN

CH3

CH2

CH4

V+ COM

I+ FG

CH1

I+ ef ef

u { bnl

h { h {

bnlu {bnlu {

ef

CH2 CH3 CH4

DC24V

PULL

24V

D-A

POWER

V+ I+

V- I-

CH1

DC24V

V- h | h |

u { h {

u | u |

h {u {h {u {

h |

CH2 CH3 CH4

POWER

POO `QSOu`b

L N X1 X3 X5 X7 X1 X3 X5 X724V

X0 X2 X4 X6 X0 X2 X4 X6

Y0 Y2 Y4 Y6

COM1 Y1 Y3 COM2 Y5 Y7 COM3 COM4

SG0VS/S

POWER

FG FG

L+ L+ I-I-

L- L-

24V

A-D

CH1 CH2

DC24V

In addition to the above functions, the buffer memories can adjust the I/O characteristics of the FX-4DA, and

report the status of the FX-4DA to the programmable controller.

Switching the output mode resets the I/O characteristics to the factory-set characteristics. Refer to the

performance specifications described in section 4.

Example: H2110 CH1: Voltage output (-10 V to +10 V)

CH2 and CH3: Current output (+4 mA to +20 mA)

CH4: Current output (0 mA to +20 mA)

②[BFM #1, #2, #3 and #4]: Output data channels CH1, CH2, CH3, and CH4

BFM #1: Output data of CH1 (Initial value: 0) BFM #2: Output data of CH2 (Initial value: 0)

BFM #3: Output data of CH3 (Initial value: 0) BFM #4: Output data of CH4 (Initial value: 0)

③[BFM #5]: Data holding mode: While the programmable controller is in the STOP mode, the last output value

in the RUN mode will be held. To reset the value to the offset value, write the hexadecimal value in BFM #5

as follows:

❍= 0:Sets the voltage output mode (-10 V to +10 V).

❍= 1:Sets the current output mode (+4 mA to 20 mA).

❍= 2:Sets the current output mode (0 mA to +20 mA).

CH4 CH3 CH2 CH1

❍= 0: Holds the output.

❍= 1: Resets to the offset value.

CH4 CH3 CH2 CH1

1 INTRODUCTION

●The FX-4DA analog special function block has four output channels. The output channels take a digital value

and output an equivalent analog signal. This is called a D/A conversion. The FX-4DA has a maximum

resolution of 12 bits.

●The selection of voltage or current based input/output is by user wiring. Analog ranges of -10 to 10V

(resolution: 5mV), and/or 0 to 20mA (resolution: 20µA) maybe selected independently for each channel.

●FX programmable controllers versions 2.0 or later (those with serial number 13XXXX or larger) are required;

as these units have the TO/FROM applied instructions in their instruction set. Data transfer between the

FX-4DA and the FX base unit is by buffer memory exchange. There are 32 buffer memories (each of 16 bits)

in the FX-4DA.

●The FX-4DA occupies 8 points of I/O on the FX, FX2C expansion bus. The 8 points can be allocated from

either inputs or outputs. The FX-4DA draws 30mA from the 5V rail of the base unit or powered extension unit.

For M3.5 (0.14)

●

Be sure to use the crimp-style terminals that satisfy

the dimensional requirements shown in the left figure.

Apply 0.5 to 0.8 N•m (5 to 8 kgf•cm) torque to tighten

the terminals. Firmly tighten the terminals to prevent

abnormal operation.

Handling of crimp-style terminal

WIRING: The terminal layout shown below may differ from the actual layout. For the correct terminal layout,

refer to section 2 Externel Dimensions and Parts.

FX-48MR

X000-X027

Y000-Y027

FX-4AD

Special block

No.0

FX-8EX

X030-

X037

FX-4DA

Special block

No.1

FX-32ER

X040-X057

Y030-Y047

FX-2AD-PT

Special block

No.2

*4:Connect the terminal on the FX-4DA with the

terminal on the MPU of the programmable

controller.

*5:Shorting the voltage output terminal or connecting

the current output load to the voltage output

terminal may damage the FX-4DA.

*6:The 24V DC service power of the programmable

controller can also be used.

*7: Do not connect any unit to the unused terminal

*1:Use a twisted pair shielded cable for the analog

output. This cable should be wired away from power

lines or any other lines which could induce noise.

*2:Apply 1-point grounding at the load side of the

output cable (class 3 grounding: 100Ωor less).

*3:If electrical noise or a voltage ripple exists at

the output, connect a smoothing capacitor of 0.1 to

0.47µF, 25V.

Data is transmitted between the FX-4DA and the MPU via buffer memories (16-bit 32-point RAM).

Buffer memories marked "W" can be

written to using the T0 instruction in the

MPU.

The status of BFM #0, #5, and #21,

(marked E) will be written to EEPROM,

therefore the set values will be retained

even after turning off the power.

Example: H0011•••••CH1 and CH2 = Offset value CH3 and CH4 = Output holding

Buffer memories marked "W" can be written to

using the TO instruction in the MPU.

The status of BFM #0, #5, and #21, (marked E)

will be written to EEPROM, therefore the set

values will be retained even after turning off the

power. Actual analog output value

when corresponding output

data (BFM #1 through #4) is 0

Actual analog output value

when corresponding output

data (BFM #1 through #4) is

+1,000

*1:

*2:

*3: When current output mode 1 (+4 mA to +20

mA) is set, the offset data will be

automatically set to +4,000 and the gain data

to +20,000. When the current output mode 2

(0 mA to +20 mA) is set, the offset data will

be automatically set to 0 and the gain data to

+20,000.

BFM Description

#0 E Output mode select. Factory setting H0000

#1 Output data (Signed 16 bits binary; actual value

11 bits + sign)

#1: CH1, #2: CH2, #3: CH3, #4: CH4

#5 E Data holding mode. Factory setting H0000

#6 #7 Reserved

①[BFM #0] Output mode select: The value of BFM #0 switches the analog output between voltage and current

on each channel. It takes the form of a 4 digit hexadecimal number. The first digit will be the command for

channel 1 (CH1), and the second digit for channel 2 (CH2) etc. The numeric values of these four digits

respectively represent the following items:

+20mA

0Digital input

Digital input

+1,000

5 ALLOCATION OF BUFFER MEMORIES (BFM)

4 Specifications

-10.24V

-2,048

+2,047

+2,000

+1,000

+10.235V

-2,000

Analog

output

}Output

mode

CH1

CH2 *7

DC/DC

converter

+15V

6.8 mm

(0.27inches)

or less

④[BFM #8 and #9] Offset/gain setting command: Changes offset and gain values of channels CH1 through CH4 by writing 1 to

the corresponding Hex digits of BFM #8 or #9. The current values will be valid until this command is output.

❍= 0: No changes done.

❍= 1: Change data value.

(Program example : see section 8.)

⑤[BFM #10 through #17] Offset/gain data: The offset and gain values are changed by writing new data to BFM #10 through #17.

The units of the data to be written is mV or µA. The data should be written and then BFM #8 and #9 set. Note that the data

value will be rounded down to the nearest 5mV or 20µA.

The offset and gain data values are reset to zero at power ON. Howerer, using the offset/gain setting

commands (BFM #8, #9) causes the values to be saved to EEPROM. It is not neccesary to write the data

a second time.

Note

BFM #8 BFM #9

2 EXTERNAL DIMENSIONS AND PARTS

3 INSTALLATION AND WIRING

Analog

output

+4mA

+20mA

Dimensions:

mm(inches)

-10V Digital input

Analog

output +10V

DC24V+

DC24V-

±±

Ω

µ:

Downloaded from ManualsNet.com search engine

⑥[BFM #20] Initialize: When K1 is written in BFM #20, all values will be initialized to the factory-settings.

(Note that the BFM #20 data will override the BFM #21 data.) This initialize function is convenient if you have an

error in adjustment.

⑦[BFM #21] I/O characteristics adjustment inhibit: Setting BFM #21 to 2 inhibits the user from inadvertent

adjustment of I/O characteristics. The adjustment inhibit function, once set, will be valid until the Permit command

(BFM #21=1) is set. The initial value is 1 (Permit). The set value will be retained even after power-off.

Offset data

Gain value

Item Voltage output Current output

Analog output

range -10VDC to +10V DC (External load resistance:2k to

1M ) DC 0mA to +20mA (External load resistance:500 )

Digital input 16 bits, binary, with sign (Effective bits for numeric value:11 bits and sign bit (1 bit))

Resolution 5mV (10V 1/2000) 20 A (20mA 1/1000)

Total accuracy 1% (at full scale of +10V) 1% (at full scale of +20mA)

Conversion speed 2.1ms for 4 channels (Change in the number of channels used will not change the conversion speed.)

Isolation Photo-coupler isolation between analog and digtital circuits.

DC/DC converter isolation of power from FX base unit.

No isolation between analog channels.

External power

supply DC 24V 10% 200mA

Number of

occupied I/O

points 8 points taken from the FX expansion bus (can be either inputs or outputs)

Power

consumption 5V, 30mA (Internal power supply from MPU or powered extension unit)

I/O

characteristics

(Default: Mode0)

Follow the

procedure

described in

section 8 to

change.

Mode 0 (Voltage

output:-10V to +10V) At load resistance of

10k Mode 1 (Current

output:+4mA to +20mA) At load resistance of

250

Mode 2 (Current

output:0mA to +20mA) At load resistance of

250

BFM

#8(E) Offset/gain setting command CH1, CH2 Initial value H0000

#9(E) Offset/gain setting command CH3, CH4 Initial value H0000

#10 Offset data CH1 *1

Unit:mV or A

Initial offset value:0

Initial gain value:+5,000

#11 Gain data CH1 *2

#12 Offset data CH2 *1

#13 Gain data CH2 *2

#14 Offset data CH3 *1

#15 Gain data CH3 *2

#16 Offset data CH4 *1

#17 Gain data CH4 *2

#18, #19 Reserved

W#20(E) Initialize, initial value = 0

#21 E I/O characteristics adjustment inhibit (Initial value 1)

#22 #28 Reserved

#29 Error status

#30 K3020 identification code

#31 Reserved

●Weight: Approx. 0.3 kg ●Accessory: Special block number label

①Extension cable

②Power indicator lamp (LED)

5V power is supplied from the programmable

controller to light this indicator lamp.

③Power supply terminals

(Screw terminal: M3.5(0.14))

④Analog output terminals

(Screw terminals : M3.5 (0.14))

⑤24V power indicator lamp (LED)

24V DC power is supplied to the terminals of the FX-4DA

to light this indicator lamp.

⑥D-A conversion indicator lamp (LED)

Flashes at a high speed if D-A conversion is

performing without a problem.

⑦Hole for direct mounting (2-φ5.5) (0.22)

⑧Groove for DIN rail mounting

(Width of DIN rail : 35 mm 1.38")

⑨Hook for DIN rail

FX-4DA

SPECIAL FUNCTION BLOCK

USER'S GUIDE

JY992D61001B

This manual contains text, diagrams and explanations which will guide the reader in the correct installation and

operation of the FX-4DA special function block and should be read and understood before attempting to install

or use the unit.

Further information can be found in the FX PROGRAMMING MANUAL and FX SERIES HARDWARE MANUAL.

CONNECTION TO PROGRAMMABLE CONTROLLER

Various special blocks controlled by the FROM/TO commands, such as the analog input blocks high-speed

counter blocks, etc. can be connected to the FX or FX2C programmable controller (MPU), or connected to the

right side of the other extension blocks or units. Up to eight special blocks can be connected to a single MPU in

the numeric order of No. 0 to No. 7.

ENVIRONMENT SPECIFICATIONS

The environment specifications are the same as those for the MPU of the programmable controller. Refer to the

FX-series Hardware Manual.

PERFORMANCE SPECIFICATIONS

DC24V±10%200mA

FX-4DA

V+

V-

I+

I-

V+

V-

I+

I-

*1 *2

Mixedoutputfromthesamechannelisnotpossible.

*3 Inverter,etc.

Extension cable

Class 3

Grounding

(100Ωor less) P C

Current output

Recorder,etc.

Commands sent from the programmable controller can

change the mode. The voltage/current output mode

selected will determine the output terminals used.

POWER

RUN

BATT.V

PROG¥E

CPU¥E

L N 24+ 24+ R UN X1 X3 X5 X7 X11 X13 X15 X17 X21 X23 X25 X27

COM X0 X2 X4 X6 X10 X12 X14 X16 X20 X22 X24 X26COM

`bWT `QUSu

Y0 Y2

COM1 Y1 Y3 COM2

Y7 COM3

Y10

Y11

Y12

Y13 COM4

Y14

Y15

Y16

Y17

Y20

Y21

Y22

Y23

Y24

Y25

Y26

Y27COM5

POWER

S/S

X4 X6

X5 X7

24V

A-D

POWER

READY

CH1

OFFSET

GAIN

CH3

CH2

CH4

V+ COM

I+ FG

CH1

I+ ef ef

u { bnl

h { h {

bnlu {bnlu {

ef

CH2 CH3 CH4

DC24V

PULL

24V

D-A

POWER

V+ I+

V- I-

CH1

DC24V

V- h | h |

u { h {

u | u |

h {u {h {u {

h |

CH2 CH3 CH4

POWER

POO `QSOu`b

L N X1 X3 X5 X7 X1 X3 X5 X724V

X0 X2 X4 X6 X0 X2 X4 X6

Y0 Y2 Y4 Y6

COM1 Y1 Y3 COM2 Y5 Y7 COM3 COM4

SG0VS/S

POWER

FG FG

L+ L+ I-I-

L- L-

24V

A-D

CH1 CH2

DC24V

In addition to the above functions, the buffer memories can adjust the I/O characteristics of the FX-4DA, and

report the status of the FX-4DA to the programmable controller.

Switching the output mode resets the I/O characteristics to the factory-set characteristics. Refer to the

performance specifications described in section 4.

Example: H2110 CH1: Voltage output (-10 V to +10 V)

CH2 and CH3: Current output (+4 mA to +20 mA)

CH4: Current output (0 mA to +20 mA)

②[BFM #1, #2, #3 and #4]: Output data channels CH1, CH2, CH3, and CH4

BFM #1: Output data of CH1 (Initial value: 0) BFM #2: Output data of CH2 (Initial value: 0)

BFM #3: Output data of CH3 (Initial value: 0) BFM #4: Output data of CH4 (Initial value: 0)

③[BFM #5]: Data holding mode: While the programmable controller is in the STOP mode, the last output value

in the RUN mode will be held. To reset the value to the offset value, write the hexadecimal value in BFM #5

as follows:

❍= 0:Sets the voltage output mode (-10 V to +10 V).

❍= 1:Sets the current output mode (+4 mA to 20 mA).

❍= 2:Sets the current output mode (0 mA to +20 mA).

CH4 CH3 CH2 CH1

❍= 0: Holds the output.

❍= 1: Resets to the offset value.

CH4 CH3 CH2 CH1

1 INTRODUCTION

●The FX-4DA analog special function block has four output channels. The output channels take a digital value

and output an equivalent analog signal. This is called a D/A conversion. The FX-4DA has a maximum

resolution of 12 bits.

●The selection of voltage or current based input/output is by user wiring. Analog ranges of -10 to 10V

(resolution: 5mV), and/or 0 to 20mA (resolution: 20µA) maybe selected independently for each channel.

●FX programmable controllers versions 2.0 or later (those with serial number 13XXXX or larger) are required;

as these units have the TO/FROM applied instructions in their instruction set. Data transfer between the

FX-4DA and the FX base unit is by buffer memory exchange. There are 32 buffer memories (each of 16 bits)

in the FX-4DA.

●The FX-4DA occupies 8 points of I/O on the FX, FX2C expansion bus. The 8 points can be allocated from

either inputs or outputs. The FX-4DA draws 30mA from the 5V rail of the base unit or powered extension unit.

For M3.5 (0.14)

●

Be sure to use the crimp-style terminals that satisfy

the dimensional requirements shown in the left figure.

Apply 0.5 to 0.8 N•m (5 to 8 kgf•cm) torque to tighten

the terminals. Firmly tighten the terminals to prevent

abnormal operation.

Handling of crimp-style terminal

WIRING: The terminal layout shown below may differ from the actual layout. For the correct terminal layout,

refer to section 2 Externel Dimensions and Parts.

FX-48MR

X000-X027

Y000-Y027

FX-4AD

Special block

No.0

FX-8EX

X030-

X037

FX-4DA

Special block

No.1

FX-32ER

X040-X057

Y030-Y047

FX-2AD-PT

Special block

No.2

*4:Connect the terminal on the FX-4DA with the

terminal on the MPU of the programmable

controller.

*5:Shorting the voltage output terminal or connecting

the current output load to the voltage output

terminal may damage the FX-4DA.

*6:The 24V DC service power of the programmable

controller can also be used.

*7: Do not connect any unit to the unused terminal

*1:Use a twisted pair shielded cable for the analog

output. This cable should be wired away from power

lines or any other lines which could induce noise.

*2:Apply 1-point grounding at the load side of the

output cable (class 3 grounding: 100Ωor less).

*3:If electrical noise or a voltage ripple exists at

the output, connect a smoothing capacitor of 0.1 to

0.47µF, 25V.

Data is transmitted between the FX-4DA and the MPU via buffer memories (16-bit 32-point RAM).

Buffer memories marked "W" can be

written to using the T0 instruction in the

MPU.

The status of BFM #0, #5, and #21,

(marked E) will be written to EEPROM,

therefore the set values will be retained

even after turning off the power.

Example: H0011•••••CH1 and CH2 = Offset value CH3 and CH4 = Output holding

Buffer memories marked "W" can be written to

using the TO instruction in the MPU.

The status of BFM #0, #5, and #21, (marked E)

will be written to EEPROM, therefore the set

values will be retained even after turning off the

power. Actual analog output value

when corresponding output

data (BFM #1 through #4) is 0

Actual analog output value

when corresponding output

data (BFM #1 through #4) is

+1,000

*1:

*2:

*3: When current output mode 1 (+4 mA to +20

mA) is set, the offset data will be

automatically set to +4,000 and the gain data

to +20,000. When the current output mode 2

(0 mA to +20 mA) is set, the offset data will

be automatically set to 0 and the gain data to

+20,000.

BFM Description

#0 E Output mode select. Factory setting H0000

#1 Output data (Signed 16 bits binary; actual value

11 bits + sign)

#1: CH1, #2: CH2, #3: CH3, #4: CH4

#5 E Data holding mode. Factory setting H0000

#6 #7 Reserved

①[BFM #0] Output mode select: The value of BFM #0 switches the analog output between voltage and current

on each channel. It takes the form of a 4 digit hexadecimal number. The first digit will be the command for

channel 1 (CH1), and the second digit for channel 2 (CH2) etc. The numeric values of these four digits

respectively represent the following items:

+20mA

0Digital input

Digital input

+1,000

5 ALLOCATION OF BUFFER MEMORIES (BFM)

4 Specifications

-10.24V

-2,048

+2,047

+2,000

+1,000

+10.235V

-2,000

Analog

output

}Output

mode

CH1

CH2 *7

DC/DC

converter

+15V

6.8 mm

(0.27inches)

or less

④[BFM #8 and #9] Offset/gain setting command: Changes offset and gain values of channels CH1 through CH4 by writing 1 to

the corresponding Hex digits of BFM #8 or #9. The current values will be valid until this command is output.

❍= 0: No changes done.

❍= 1: Change data value.

(Program example : see section 8.)

⑤[BFM #10 through #17] Offset/gain data: The offset and gain values are changed by writing new data to BFM #10 through #17.

The units of the data to be written is mV or µA. The data should be written and then BFM #8 and #9 set. Note that the data

value will be rounded down to the nearest 5mV or 20µA.

The offset and gain data values are reset to zero at power ON. Howerer, using the offset/gain setting

commands (BFM #8, #9) causes the values to be saved to EEPROM. It is not neccesary to write the data

a second time.

Note

BFM #8 BFM #9

2 EXTERNAL DIMENSIONS AND PARTS

3 INSTALLATION AND WIRING

Analog

output

+4mA

+20mA

Dimensions:

mm(inches)

-10V Digital input

Analog

output +10V

DC24V+

DC24V-

±±

Ω

µ:

Downloaded from ManualsNet.com search engine

⑥[BFM #20] Initialize: When K1 is written in BFM #20, all values will be initialized to the factory-settings.

(Note that the BFM #20 data will override the BFM #21 data.) This initialize function is convenient if you have an

error in adjustment.

⑦[BFM #21] I/O characteristics adjustment inhibit: Setting BFM #21 to 2 inhibits the user from inadvertent

adjustment of I/O characteristics. The adjustment inhibit function, once set, will be valid until the Permit command

(BFM #21=1) is set. The initial value is 1 (Permit). The set value will be retained even after power-off.

Offset data

Gain value

Item Voltage output Current output

Analog output

range -10VDC to +10V DC (External load resistance:2k to

1M ) DC 0mA to +20mA (External load resistance:500 )

Digital input 16 bits, binary, with sign (Effective bits for numeric value:11 bits and sign bit (1 bit))

Resolution 5mV (10V 1/2000) 20 A (20mA 1/1000)

Total accuracy 1% (at full scale of +10V) 1% (at full scale of +20mA)

Conversion speed 2.1ms for 4 channels (Change in the number of channels used will not change the conversion speed.)

Isolation Photo-coupler isolation between analog and digtital circuits.

DC/DC converter isolation of power from FX base unit.

No isolation between analog channels.

External power

supply DC 24V 10% 200mA

Number of

occupied I/O

points 8 points taken from the FX expansion bus (can be either inputs or outputs)

Power

consumption 5V, 30mA (Internal power supply from MPU or powered extension unit)

I/O

characteristics

(Default: Mode0)

Follow the

procedure

described in

section 8 to

change.

Mode 0 (Voltage

output:-10V to +10V) At load resistance of

10k Mode 1 (Current

output:+4mA to +20mA) At load resistance of

250

Mode 2 (Current

output:0mA to +20mA) At load resistance of

250

BFM

#8(E) Offset/gain setting command CH1, CH2 Initial value H0000

#9(E) Offset/gain setting command CH3, CH4 Initial value H0000

#10 Offset data CH1 *1

Unit:mV or A

Initial offset value:0

Initial gain value:+5,000

#11 Gain data CH1 *2

#12 Offset data CH2 *1

#13 Gain data CH2 *2

#14 Offset data CH3 *1

#15 Gain data CH3 *2

#16 Offset data CH4 *1

#17 Gain data CH4 *2

#18, #19 Reserved

W#20(E) Initialize, initial value = 0

#21 E I/O characteristics adjustment inhibit (Initial value 1)

#22 #28 Reserved

#29 Error status

#30 K3020 identification code

#31 Reserved

●Weight: Approx. 0.3 kg ●Accessory: Special block number label

①Extension cable

②Power indicator lamp (LED)

5V power is supplied from the programmable

controller to light this indicator lamp.

③Power supply terminals

(Screw terminal: M3.5(0.14))

④Analog output terminals

(Screw terminals : M3.5 (0.14))

⑤24V power indicator lamp (LED)

24V DC power is supplied to the terminals of the FX-4DA

to light this indicator lamp.

⑥D-A conversion indicator lamp (LED)

Flashes at a high speed if D-A conversion is

performing without a problem.

⑦Hole for direct mounting (2-φ5.5) (0.22)

⑧Groove for DIN rail mounting

(Width of DIN rail : 35 mm 1.38")

⑨Hook for DIN rail

FX-4DA

SPECIAL FUNCTION BLOCK

USER'S GUIDE

JY992D61001B

This manual contains text, diagrams and explanations which will guide the reader in the correct installation and

operation of the FX-4DA special function block and should be read and understood before attempting to install

or use the unit.

Further information can be found in the FX PROGRAMMING MANUAL and FX SERIES HARDWARE MANUAL.

CONNECTION TO PROGRAMMABLE CONTROLLER

Various special blocks controlled by the FROM/TO commands, such as the analog input blocks high-speed

counter blocks, etc. can be connected to the FX or FX2C programmable controller (MPU), or connected to the

right side of the other extension blocks or units. Up to eight special blocks can be connected to a single MPU in

the numeric order of No. 0 to No. 7.

ENVIRONMENT SPECIFICATIONS

The environment specifications are the same as those for the MPU of the programmable controller. Refer to the

FX-series Hardware Manual.

PERFORMANCE SPECIFICATIONS

DC24V±10%200mA

FX-4DA

V+

V-

I+

I-

V+

V-

I+

I-

*1 *2

Mixedoutputfromthesamechannelisnotpossible.

*3 Inverter,etc.

Extension cable

Class 3

Grounding

(100Ωor less) P C

Current output

Recorder,etc.

Commands sent from the programmable controller can

change the mode. The voltage/current output mode

selected will determine the output terminals used.

POWER

RUN

BATT.V

PROG¥E

CPU¥E

L N 24+ 24+ R UN X1 X3 X5 X7 X11 X13 X15 X17 X21 X23 X25 X27

COM X0 X2 X4 X6 X10 X12 X14 X16 X20 X22 X24 X26COM

`bWT `QUSu

Y0 Y2

COM1 Y1 Y3 COM2

Y7 COM3

Y10

Y11

Y12

Y13 COM4

Y14

Y15

Y16

Y17

Y20

Y21

Y22

Y23

Y24

Y25

Y26

Y27COM5

POWER

S/S

X4 X6

X5 X7

24V

A-D

POWER

READY

CH1

OFFSET

GAIN

CH3

CH2

CH4

V+ COM

I+ FG

CH1

I+ ef ef

u { bnl

h { h {

bnlu {bnlu {

ef

CH2 CH3 CH4

DC24V

PULL

24V

D-A

POWER

V+ I+

V- I-

CH1

DC24V

V- h | h |

u { h {

u | u |

h {u {h {u {

h |

CH2 CH3 CH4

POWER

POO `QSOu`b

L N X1 X3 X5 X7 X1 X3 X5 X724V

X0 X2 X4 X6 X0 X2 X4 X6

Y0 Y2 Y4 Y6

COM1 Y1 Y3 COM2 Y5 Y7 COM3 COM4

SG0VS/S

POWER

FG FG

L+ L+ I-I-

L- L-

24V

A-D

CH1 CH2

DC24V

In addition to the above functions, the buffer memories can adjust the I/O characteristics of the FX-4DA, and

report the status of the FX-4DA to the programmable controller.

Switching the output mode resets the I/O characteristics to the factory-set characteristics. Refer to the

performance specifications described in section 4.

Example: H2110 CH1: Voltage output (-10 V to +10 V)

CH2 and CH3: Current output (+4 mA to +20 mA)

CH4: Current output (0 mA to +20 mA)

②[BFM #1, #2, #3 and #4]: Output data channels CH1, CH2, CH3, and CH4

BFM #1: Output data of CH1 (Initial value: 0) BFM #2: Output data of CH2 (Initial value: 0)

BFM #3: Output data of CH3 (Initial value: 0) BFM #4: Output data of CH4 (Initial value: 0)

③[BFM #5]: Data holding mode: While the programmable controller is in the STOP mode, the last output value

in the RUN mode will be held. To reset the value to the offset value, write the hexadecimal value in BFM #5

as follows:

❍= 0:Sets the voltage output mode (-10 V to +10 V).

❍= 1:Sets the current output mode (+4 mA to 20 mA).

❍= 2:Sets the current output mode (0 mA to +20 mA).

CH4 CH3 CH2 CH1

❍= 0: Holds the output.

❍= 1: Resets to the offset value.

CH4 CH3 CH2 CH1

1 INTRODUCTION

●The FX-4DA analog special function block has four output channels. The output channels take a digital value

and output an equivalent analog signal. This is called a D/A conversion. The FX-4DA has a maximum

resolution of 12 bits.

●The selection of voltage or current based input/output is by user wiring. Analog ranges of -10 to 10V

(resolution: 5mV), and/or 0 to 20mA (resolution: 20µA) maybe selected independently for each channel.

●FX programmable controllers versions 2.0 or later (those with serial number 13XXXX or larger) are required;

as these units have the TO/FROM applied instructions in their instruction set. Data transfer between the

FX-4DA and the FX base unit is by buffer memory exchange. There are 32 buffer memories (each of 16 bits)

in the FX-4DA.

●The FX-4DA occupies 8 points of I/O on the FX, FX2C expansion bus. The 8 points can be allocated from

either inputs or outputs. The FX-4DA draws 30mA from the 5V rail of the base unit or powered extension unit.

For M3.5 (0.14)

●

Be sure to use the crimp-style terminals that satisfy

the dimensional requirements shown in the left figure.

Apply 0.5 to 0.8 N•m (5 to 8 kgf•cm) torque to tighten

the terminals. Firmly tighten the terminals to prevent

abnormal operation.

Handling of crimp-style terminal

WIRING: The terminal layout shown below may differ from the actual layout. For the correct terminal layout,

refer to section 2 Externel Dimensions and Parts.

FX-48MR

X000-X027

Y000-Y027

FX-4AD

Special block

No.0

FX-8EX

X030-

X037

FX-4DA

Special block

No.1

FX-32ER

X040-X057

Y030-Y047

FX-2AD-PT

Special block

No.2

*4:Connect the terminal on the FX-4DA with the

terminal on the MPU of the programmable

controller.

*5:Shorting the voltage output terminal or connecting

the current output load to the voltage output

terminal may damage the FX-4DA.

*6:The 24V DC service power of the programmable

controller can also be used.

*7: Do not connect any unit to the unused terminal

*1:Use a twisted pair shielded cable for the analog

output. This cable should be wired away from power

lines or any other lines which could induce noise.

*2:Apply 1-point grounding at the load side of the

output cable (class 3 grounding: 100Ωor less).

*3:If electrical noise or a voltage ripple exists at

the output, connect a smoothing capacitor of 0.1 to

0.47µF, 25V.

Data is transmitted between the FX-4DA and the MPU via buffer memories (16-bit 32-point RAM).

Buffer memories marked "W" can be

written to using the T0 instruction in the

MPU.

The status of BFM #0, #5, and #21,

(marked E) will be written to EEPROM,

therefore the set values will be retained

even after turning off the power.

Example: H0011•••••CH1 and CH2 = Offset value CH3 and CH4 = Output holding

Buffer memories marked "W" can be written to

using the TO instruction in the MPU.

The status of BFM #0, #5, and #21, (marked E)

will be written to EEPROM, therefore the set

values will be retained even after turning off the

power. Actual analog output value

when corresponding output

data (BFM #1 through #4) is 0

Actual analog output value

when corresponding output

data (BFM #1 through #4) is

+1,000

*1:

*2:

*3: When current output mode 1 (+4 mA to +20

mA) is set, the offset data will be

automatically set to +4,000 and the gain data

to +20,000. When the current output mode 2

(0 mA to +20 mA) is set, the offset data will

be automatically set to 0 and the gain data to

+20,000.

BFM Description

#0 E Output mode select. Factory setting H0000

#1 Output data (Signed 16 bits binary; actual value

11 bits + sign)

#1: CH1, #2: CH2, #3: CH3, #4: CH4

#5 E Data holding mode. Factory setting H0000

#6 #7 Reserved

①[BFM #0] Output mode select: The value of BFM #0 switches the analog output between voltage and current

on each channel. It takes the form of a 4 digit hexadecimal number. The first digit will be the command for

channel 1 (CH1), and the second digit for channel 2 (CH2) etc. The numeric values of these four digits

respectively represent the following items:

+20mA

0Digital input

Digital input

+1,000

5 ALLOCATION OF BUFFER MEMORIES (BFM)

4 Specifications

-10.24V

-2,048

+2,047

+2,000

+1,000

+10.235V

-2,000

Analog

output

}Output

mode

CH1

CH2 *7

DC/DC

converter

+15V

6.8 mm

(0.27inches)

or less

④[BFM #8 and #9] Offset/gain setting command: Changes offset and gain values of channels CH1 through CH4 by writing 1 to

the corresponding Hex digits of BFM #8 or #9. The current values will be valid until this command is output.

❍= 0: No changes done.

❍= 1: Change data value.

(Program example : see section 8.)

⑤[BFM #10 through #17] Offset/gain data: The offset and gain values are changed by writing new data to BFM #10 through #17.

The units of the data to be written is mV or µA. The data should be written and then BFM #8 and #9 set. Note that the data

value will be rounded down to the nearest 5mV or 20µA.

The offset and gain data values are reset to zero at power ON. Howerer, using the offset/gain setting

commands (BFM #8, #9) causes the values to be saved to EEPROM. It is not neccesary to write the data

a second time.

Note

BFM #8 BFM #9

2 EXTERNAL DIMENSIONS AND PARTS

3 INSTALLATION AND WIRING

Analog

output

+4mA

+20mA

Dimensions:

mm(inches)

-10V Digital input

Analog

output +10V

DC24V+

DC24V-

±±

Ω

µ:

Downloaded from ManualsNet.com search engine

FNC78

FROM

Read BFM

FNC79

Write BFM

(Offset value:7mA)

(K20000)→BFM#13

Sets the gain data.

OPERATION END

HEAD OFFICE : MITSUBISHI DENKI BLDG MARUNOUCHI TOKYO 100 TELEX : J24532 CABLE MELCO TOKYO

HIMEJI WORKS : 840, CHIYODA CHO, HIMEJI, JAPAN

Manual number : JY992D61001

Manual revison : B

Date : November 1996

●••••••Gain value: Analog output value when the digital input is +1,000

▲••••••Offset value: Analog output value when the digital input is 0

When the slope of the I/O characteristic line is steep: Slight changes to the digital input will greatly increase

or reduce the analog output.

When the slope of the I/O characteristic line is gentle: Slight changes to the digital input will not always

change the analog output.

Check whether the output wiring and/or expansion cables are properly connected on FX-4DA analog special

function block.

Check that the FX system configuration rules have not been broken, i.e. the number of blocks does not

exceed 8 and the total system I/O is equal or less than 256 I/O.

Ensure that the correct output mode has been selected for the application.

Check that there is no power overload on either the 5V or 24V power source, remember the loading on the FX

MPU or a powered extension unit varies according to the number of extension blocks or special function

blocks connected.

Put the main processing unit into RUN.

After turning on or off the 24V DC power for analog signals, the analog output may fluctuate for approximately 1 second. This is

due to time delays in the power supply from the MPU or differences in start time. For this reason, be sure to take preventive

measures so that this output fluctuation will not affect the external units.

①

②

③

④

⑤

⑥

Adjustment of I/O Characteristics

To adjust the I/O characteristics, set the offset and gain of the FX-4DA either using pushbutton switches

connected to input terminals of the programmable controller or using the forced on/off function of a

programming panel. To change the offset and gain, just change the conversion constants of the FX-4DA.

Metering of the analog output is not needed for adjustment, however a program should be created in the MPU.

An example program for adjustment is shown below. The example shows that for channel CH2 of FX-4DA block

No. 1, the offset value is changed to 7 mA, and the gain value to 20 mA. Note that for CH1, CH3, and CH4, the

standard voltage output characteristics are set.

Note that the resolution (minimum possible change of analog output) of the FX-4DA is fixed.

I/O characteristics

The standard characteristics (factory default) are shown by the solid lines in the figure below. These

characteristics can be adjusted according to the conditions of the user's system.

Standard characteristics

of voltage output Standard characteristics of current

output (+4mA to +20mA) Standard characteristics of current

output (0mA to +20mA)

Digital input Digital input

-2,000

-10.24V -10V

+2,000+1,000

+10.235V

Outline of FROM and TO commands: For a detailed description, refer to the FX Programming Manual.

Read command

X010 FROM K1 K30 D0 K1 BFM #30 of special unit No.1 →D0

m1 m2 D• n

D•

Special unit or block number (K0 to K7, numbered from the MPU)

Buffer memory head address (K0 to K31)

Head device number of destination data. T, C, D, KnM, KnY, KnS, V, and Z can be used to

designate the head device. Each device number can be qualified using an index.

Number of transfer points (K1 to K32) (K1 to K16 for 32-bit command)

X011 TO K1 K1 D2 K2 D2 and D3 →BFM #1 and #2 of special unit No.1

m1, m2, n

S• :

If the FX-4DA does not operate properly, check the following items

①

②

③

④

⑤

⑥

Check the external wiring. Refer to section 3 of this manual.

Check status of the POWER indicator lamp (LED) of the FX-4DA.

On: The extension cable is properly connected.

Off or flash: Check connection of extension cable. Also check the 5 V power supply capacity.

Check status of the 24 V power indicator lamp (LED) of the FX-4DA.

On: 24V DC is supplied.

Off: Supply 24V DC (+10%) to the FX-4DA.

Check the status of the D-A conversion indicator lamp (LED) of the FX-4DA.

Flash: D-A conversion is normal.

On or off: The ambient conditions are not suitable for the FX-4DA, or the FX-4DA is defective.

Check that the external load resistance connected to each analog output terminal does not exceed the

capacity of the FX-4DA drive (voltage output: 2kΩto 1 MΩ/ current output: 500Ω).

Check the output voltage or current value using a voltmeter or ammeter, and confirm that the output meets

the I/O characteristics. If the output does not meet the I/O characteristics, adjust the offset and gain again.

Refer to section 8.

D0 and D1 = -2,000 to +2,000

D2 and D3 = 0 to +1,000

Set the data to

In specified

output range

No error

BFM #30 data (model code) of block No. 1 Transferred to

data register D4.

BFM #29 (b15 to b0) →(M25 to M10)

Reads out the status data.

M1 will be turned on when the model code is set to K3020

(FX-4DA).

D0 →BFM #1 (CH1 output)

D1 →BFM #2 (CH2 output)

D2 →BFM #3 (CH3 output)

D3 →BFM #4 (CH4 output)

⑧[BFM #29] Error status: When an error occurs, use the FROM command to read out the details of the error.

Error status

00+1,000

Analog

output

00+1,000

+20mA

Digital input

After adjustment, the I/O

characteristics will be as follows

+1,000

Analog

output

+7mA

●When X010 and X011 are off, transfer will not be executed, therefore the destination data value will not be

changed.

Note

To test the withstand voltage of the FX-4DA, connect all the terminals to the grounding terminal.

Guidelines for the safety of the user and protection of

the FX-4DA special function block

This manual has been written to be used by trained and competent personnel. This is

defined by the European directives for machinery, low voltage and EMC.

If in doubt at any stage during the installation of the FX-4DA always consult a professional

electrical engineer who is qualified and trained to the local and national standards. If in

doubt about the operation or use of the FX-4DA please consult the nearest Mitsubishi

Electric distributor.

Under no circumstances will Mitsubishi Electric be liable or responsible for any

consequential damage that may arise as a result of the installation or use of this equipment.

All examples and diagrams shown in this manual are intended only as an aid to

understanding the text, not to guarantee operation. Mitsubishi Electric will accept no

responsibility for actual use of the product based on these illustrative examples.

JY992D61001B Effective NOV. 1996

Specifications are subject

to change without notice.

7 CAUTION REGARDING OPERATION

8 ADJUSTMENT OF I/O CHARACTERISTICS 9 TROUBLESHOOTING

Output data abnormal

M20

M10

M8000

RUN

monitor

+10V

+5V

H2100 →BFM #0 (unit No.1)

CH1 and CH2: Voltage output CH3: Current output (+4 mA to +20 mA)

CH4: Current output (0 mA to +20 mA)

Same as above

Head device number of source data. T, C, D, KnX, KnM, KnY, KnS, V, Z, K, and H can be used

to designate the head device. Each device number can be qualified using an index.

m1 m2 S• n

Write command

+20mA

FROM

CMP

FROM

K3020

K30

K29

H2100

K4M10

•

Initial pulse

RUN

monitor

M8002

M8000

H2100

Write the data for CH1 to D0, CH2 to D1,

CH3 to D2 and CH4 to D3.

(H2100) →BFM#0

CH1 and CH2: Voltage output CH3: Current output (+4mA to

+20 mA)

CH4: Current output (0 mA to +20 mA)

Write data in respective data registers while observing the

following ranges:

Data register D0 and D1: -2,000 to +2,000 Data registers D2

and D3: 0 to +1,000

Data register D0 →BFM #1 (output to CH1)

Data register D1 →BFM #2 (output to CH2)

Data register D2 →BFM #3 (output to CH3)

Data register D3 →BFM #4 (output to CH4)

①

②

③

④

Turn off the power of the MPU, and then connect the FX-4DA. After that, wire the I/O lines of the

FX-4DA.

Set the MPU to STOP, and turn on the power. Write the above program then switch the MPU to RUN.

Analog values will be sent from D0 (BFM #1), D1 (BFM #2), D2 (BFM #3), and D3 (BFM #4) to the respective

output channels of the FX-4DA. When the MPU is in STOP, the analog values set before stopping the MPU

will remain output. (The output will be held.)

When the MPU is in STOP, the offset values can also be output. For a detailed description, refer to Section

5, ③.

Operation procedure

Program example

For the following program, CH1 and CH2 of the FX-4DA connected at special block position No. 1 are used as

voltage output channels, CH3 as a current output channel (+4 mA to +20 mA), and CH4 as a current output

channel (0 mA to +20 mA). When the MPU is in STOP, the output will be held. In addition, the status

information is used.

FX-4DA special

function block External

analog unit

Analog data cut

off circuit

24V DC power

supply

Power switch

[Example of preventive measure]

Output mode 0

Analog

output

Digital input

+2,047

-2,048

Bit Name Status when bit is set to "1" (turned on) Status when bit is set to "0"

(turned off)

b0 Error Error if any of b1 through b4 is turned on No error

b1 O/G error Offset/gain data in EEPROM is abnormal or a data setting error occurs. Offset/gain data normal

b2 Power supply error 24 VDC power failure Power supplied normally

b3 Hardware error Defective D-A converter or other hardware Non-defective hardware

b10 Range error The digital input or analog output value is out of the specified range. The input or output value is in

the specified range.

b12 G/O-Adjustment

prohibit status BFM #21 is not set to "1". Adjustable status

(BFM #21=1)

Bits b4 through b9, b11, b13 through b15 are not defined.

If the factory-set I/O characteristics are not changed and the status information is not used, you can operate the

FX-4DA using the following simple program. For the FROM and TO commands, refer to the FX Programming

Manual.

CH1 and CH2: Voltage output mode (-10 V to +10 V) CH3: Current output mode (+4 mA to +20 mA)

CH4: Current output mode (0 mA to +20 mA)

6 OPERATION AND PROGRAM EXAMPLES

⑨[BFM #30]The identification code for a special block is read using the FROM command.The identification

code for the FX-4DA unit is K3020.The MPU can use this facility in the program to identify the special block

before commencing any data transfer from and to the special block.

•

Note : BFM #'s marked E/(E).

Values of BFM #0, #5, and #21, (marked E) are stored in EEPROM memory of the FX-4DA. BFM #10 to #17

are copied to EEPROM when the gain/offset setting command BFM #8, #9 is used. Also, BFM #20 causes

resetting of the EEPROM memory. The EEPROM has a life of about 10,000 cycles (changes), so do not use

programs which frequently change these BFMs.

•A mode change of BFM#0 automatically involves a change of the corresponding offset and gain values.

Because of the time needed to write the new values to the internal EEPROM memory, a delay of 3 s is

required between instructions changing BFM#0 and instructions writing to the corresponding BFM#10

through BFM#17.

Therefore, a delay timer should be used before writing to BFM#10 through BFM#17.

H0010

K21

X10

T0 TO

K1 K21

K12

K13

SET

RST

K7000

K20000

H1100

K30

(K7000)→BFM#12

Sets the offset data.

(K1)→BFM#21

Permits adjustment of I/O characteristics.

(H0010)→BFM#0

Sets the mode of the output channel.

OPERATION START

(Gain value:20mA)

(H1100)→BFM#8

CH2 offset/gain setting command

(K2)→BFM#21

Inhibits adjustment of I/O characteristics

+4mA

+20mA

Analog

output

Downloaded from ManualsNet.com search engine

FNC78

FROM

Read BFM

FNC79

Write BFM

(Offset value:7mA)

(K20000)→BFM#13

Sets the gain data.

OPERATION END

HEAD OFFICE : MITSUBISHI DENKI BLDG MARUNOUCHI TOKYO 100 TELEX : J24532 CABLE MELCO TOKYO

HIMEJI WORKS : 840, CHIYODA CHO, HIMEJI, JAPAN

Manual number : JY992D61001

Manual revison : B

Date : November 1996

●••••••Gain value: Analog output value when the digital input is +1,000

▲••••••Offset value: Analog output value when the digital input is 0

When the slope of the I/O characteristic line is steep: Slight changes to the digital input will greatly increase

or reduce the analog output.

When the slope of the I/O characteristic line is gentle: Slight changes to the digital input will not always

change the analog output.

Check whether the output wiring and/or expansion cables are properly connected on FX-4DA analog special

function block.

Check that the FX system configuration rules have not been broken, i.e. the number of blocks does not

exceed 8 and the total system I/O is equal or less than 256 I/O.

Ensure that the correct output mode has been selected for the application.

Check that there is no power overload on either the 5V or 24V power source, remember the loading on the FX

MPU or a powered extension unit varies according to the number of extension blocks or special function

blocks connected.

Put the main processing unit into RUN.

After turning on or off the 24V DC power for analog signals, the analog output may fluctuate for approximately 1 second. This is

due to time delays in the power supply from the MPU or differences in start time. For this reason, be sure to take preventive

measures so that this output fluctuation will not affect the external units.

①

②

③

④

⑤

⑥

Adjustment of I/O Characteristics

To adjust the I/O characteristics, set the offset and gain of the FX-4DA either using pushbutton switches

connected to input terminals of the programmable controller or using the forced on/off function of a

programming panel. To change the offset and gain, just change the conversion constants of the FX-4DA.

Metering of the analog output is not needed for adjustment, however a program should be created in the MPU.

An example program for adjustment is shown below. The example shows that for channel CH2 of FX-4DA block

No. 1, the offset value is changed to 7 mA, and the gain value to 20 mA. Note that for CH1, CH3, and CH4, the

standard voltage output characteristics are set.

Note that the resolution (minimum possible change of analog output) of the FX-4DA is fixed.

I/O characteristics

The standard characteristics (factory default) are shown by the solid lines in the figure below. These

characteristics can be adjusted according to the conditions of the user's system.

Standard characteristics

of voltage output Standard characteristics of current

output (+4mA to +20mA) Standard characteristics of current

output (0mA to +20mA)

Digital input Digital input

-2,000

-10.24V -10V

+2,000+1,000

+10.235V

Outline of FROM and TO commands: For a detailed description, refer to the FX Programming Manual.

Read command

X010 FROM K1 K30 D0 K1 BFM #30 of special unit No.1 →D0

m1 m2 D• n

D•

Special unit or block number (K0 to K7, numbered from the MPU)

Buffer memory head address (K0 to K31)

Head device number of destination data. T, C, D, KnM, KnY, KnS, V, and Z can be used to

designate the head device. Each device number can be qualified using an index.

Number of transfer points (K1 to K32) (K1 to K16 for 32-bit command)

X011 TO K1 K1 D2 K2 D2 and D3 →BFM #1 and #2 of special unit No.1

m1, m2, n

S• :

If the FX-4DA does not operate properly, check the following items

①

②

③

④

⑤

⑥

Check the external wiring. Refer to section 3 of this manual.

Check status of the POWER indicator lamp (LED) of the FX-4DA.

On: The extension cable is properly connected.

Off or flash: Check connection of extension cable. Also check the 5 V power supply capacity.

Check status of the 24 V power indicator lamp (LED) of the FX-4DA.

On: 24V DC is supplied.

Off: Supply 24V DC (+10%) to the FX-4DA.

Check the status of the D-A conversion indicator lamp (LED) of the FX-4DA.

Flash: D-A conversion is normal.

On or off: The ambient conditions are not suitable for the FX-4DA, or the FX-4DA is defective.

Check that the external load resistance connected to each analog output terminal does not exceed the

capacity of the FX-4DA drive (voltage output: 2kΩto 1 MΩ/ current output: 500Ω).

Check the output voltage or current value using a voltmeter or ammeter, and confirm that the output meets

the I/O characteristics. If the output does not meet the I/O characteristics, adjust the offset and gain again.

Refer to section 8.

D0 and D1 = -2,000 to +2,000

D2 and D3 = 0 to +1,000

Set the data to

In specified

output range

No error

BFM #30 data (model code) of block No. 1 Transferred to

data register D4.

BFM #29 (b15 to b0) →(M25 to M10)

Reads out the status data.

M1 will be turned on when the model code is set to K3020

(FX-4DA).

D0 →BFM #1 (CH1 output)

D1 →BFM #2 (CH2 output)

D2 →BFM #3 (CH3 output)

D3 →BFM #4 (CH4 output)

⑧[BFM #29] Error status: When an error occurs, use the FROM command to read out the details of the error.

Error status

00+1,000

Analog

output

00+1,000

+20mA

Digital input

After adjustment, the I/O

characteristics will be as follows

+1,000

Analog

output

+7mA

●When X010 and X011 are off, transfer will not be executed, therefore the destination data value will not be

changed.

Note

To test the withstand voltage of the FX-4DA, connect all the terminals to the grounding terminal.

Guidelines for the safety of the user and protection of

the FX-4DA special function block

This manual has been written to be used by trained and competent personnel. This is

defined by the European directives for machinery, low voltage and EMC.

If in doubt at any stage during the installation of the FX-4DA always consult a professional

electrical engineer who is qualified and trained to the local and national standards. If in

doubt about the operation or use of the FX-4DA please consult the nearest Mitsubishi

Electric distributor.

Under no circumstances will Mitsubishi Electric be liable or responsible for any

consequential damage that may arise as a result of the installation or use of this equipment.

All examples and diagrams shown in this manual are intended only as an aid to

understanding the text, not to guarantee operation. Mitsubishi Electric will accept no

responsibility for actual use of the product based on these illustrative examples.

JY992D61001B Effective NOV. 1996

Specifications are subject

to change without notice.

7 CAUTION REGARDING OPERATION

8 ADJUSTMENT OF I/O CHARACTERISTICS 9 TROUBLESHOOTING

Output data abnormal

M20

M10

M8000

RUN

monitor

+10V

+5V

H2100 →BFM #0 (unit No.1)

CH1 and CH2: Voltage output CH3: Current output (+4 mA to +20 mA)

CH4: Current output (0 mA to +20 mA)

Same as above

Head device number of source data. T, C, D, KnX, KnM, KnY, KnS, V, Z, K, and H can be used

to designate the head device. Each device number can be qualified using an index.

m1 m2 S• n

Write command

+20mA

FROM

CMP

FROM

K3020

K30

K29

H2100

K4M10

•

Initial pulse

RUN

monitor

M8002

M8000

H2100

Write the data for CH1 to D0, CH2 to D1,

CH3 to D2 and CH4 to D3.

(H2100) →BFM#0

CH1 and CH2: Voltage output CH3: Current output (+4mA to

+20 mA)

CH4: Current output (0 mA to +20 mA)

Write data in respective data registers while observing the

following ranges:

Data register D0 and D1: -2,000 to +2,000 Data registers D2

and D3: 0 to +1,000

Data register D0 →BFM #1 (output to CH1)

Data register D1 →BFM #2 (output to CH2)

Data register D2 →BFM #3 (output to CH3)

Data register D3 →BFM #4 (output to CH4)

①

②

③

④

Turn off the power of the MPU, and then connect the FX-4DA. After that, wire the I/O lines of the

FX-4DA.

Set the MPU to STOP, and turn on the power. Write the above program then switch the MPU to RUN.

Analog values will be sent from D0 (BFM #1), D1 (BFM #2), D2 (BFM #3), and D3 (BFM #4) to the respective

output channels of the FX-4DA. When the MPU is in STOP, the analog values set before stopping the MPU

will remain output. (The output will be held.)

When the MPU is in STOP, the offset values can also be output. For a detailed description, refer to Section

5, ③.

Operation procedure

Program example

For the following program, CH1 and CH2 of the FX-4DA connected at special block position No. 1 are used as

voltage output channels, CH3 as a current output channel (+4 mA to +20 mA), and CH4 as a current output

channel (0 mA to +20 mA). When the MPU is in STOP, the output will be held. In addition, the status

information is used.

FX-4DA special

function block External

analog unit

Analog data cut

off circuit

24V DC power

supply

Power switch

[Example of preventive measure]

Output mode 0

Analog

output

Digital input

+2,047

-2,048

Bit Name Status when bit is set to "1" (turned on) Status when bit is set to "0"

(turned off)

b0 Error Error if any of b1 through b4 is turned on No error

b1 O/G error Offset/gain data in EEPROM is abnormal or a data setting error occurs. Offset/gain data normal

b2 Power supply error 24 VDC power failure Power supplied normally

b3 Hardware error Defective D-A converter or other hardware Non-defective hardware

b10 Range error The digital input or analog output value is out of the specified range. The input or output value is in

the specified range.

b12 G/O-Adjustment

prohibit status BFM #21 is not set to "1". Adjustable status

(BFM #21=1)

Bits b4 through b9, b11, b13 through b15 are not defined.

If the factory-set I/O characteristics are not changed and the status information is not used, you can operate the

FX-4DA using the following simple program. For the FROM and TO commands, refer to the FX Programming

Manual.

CH1 and CH2: Voltage output mode (-10 V to +10 V) CH3: Current output mode (+4 mA to +20 mA)

CH4: Current output mode (0 mA to +20 mA)

6 OPERATION AND PROGRAM EXAMPLES

⑨[BFM #30]The identification code for a special block is read using the FROM command.The identification

code for the FX-4DA unit is K3020.The MPU can use this facility in the program to identify the special block

before commencing any data transfer from and to the special block.

•

Note : BFM #'s marked E/(E).

Values of BFM #0, #5, and #21, (marked E) are stored in EEPROM memory of the FX-4DA. BFM #10 to #17

are copied to EEPROM when the gain/offset setting command BFM #8, #9 is used. Also, BFM #20 causes

resetting of the EEPROM memory. The EEPROM has a life of about 10,000 cycles (changes), so do not use

programs which frequently change these BFMs.

•A mode change of BFM#0 automatically involves a change of the corresponding offset and gain values.

Because of the time needed to write the new values to the internal EEPROM memory, a delay of 3 s is

required between instructions changing BFM#0 and instructions writing to the corresponding BFM#10

through BFM#17.

Therefore, a delay timer should be used before writing to BFM#10 through BFM#17.

H0010

K21

X10

T0 TO

K1 K21

K12

K13

SET

RST

K7000

K20000

H1100

K30

(K7000)→BFM#12

Sets the offset data.

(K1)→BFM#21

Permits adjustment of I/O characteristics.

(H0010)→BFM#0

Sets the mode of the output channel.

OPERATION START

(Gain value:20mA)

(H1100)→BFM#8

CH2 offset/gain setting command

(K2)→BFM#21

Inhibits adjustment of I/O characteristics

+4mA

+20mA

Analog

output

Downloaded from ManualsNet.com search engine

FNC78

FROM

Read BFM

FNC79

Write BFM

(Offset value:7mA)

(K20000)→BFM#13

Sets the gain data.

OPERATION END

HEAD OFFICE : MITSUBISHI DENKI BLDG MARUNOUCHI TOKYO 100 TELEX : J24532 CABLE MELCO TOKYO

HIMEJI WORKS : 840, CHIYODA CHO, HIMEJI, JAPAN

Manual number : JY992D61001

Manual revison : B

Date : November 1996

●••••••Gain value: Analog output value when the digital input is +1,000

▲••••••Offset value: Analog output value when the digital input is 0

When the slope of the I/O characteristic line is steep: Slight changes to the digital input will greatly increase

or reduce the analog output.

When the slope of the I/O characteristic line is gentle: Slight changes to the digital input will not always

change the analog output.

Check whether the output wiring and/or expansion cables are properly connected on FX-4DA analog special

function block.

Check that the FX system configuration rules have not been broken, i.e. the number of blocks does not

exceed 8 and the total system I/O is equal or less than 256 I/O.

Ensure that the correct output mode has been selected for the application.

Check that there is no power overload on either the 5V or 24V power source, remember the loading on the FX

MPU or a powered extension unit varies according to the number of extension blocks or special function

blocks connected.

Put the main processing unit into RUN.

After turning on or off the 24V DC power for analog signals, the analog output may fluctuate for approximately 1 second. This is

due to time delays in the power supply from the MPU or differences in start time. For this reason, be sure to take preventive

measures so that this output fluctuation will not affect the external units.

①

②

③

④

⑤

⑥

Adjustment of I/O Characteristics

To adjust the I/O characteristics, set the offset and gain of the FX-4DA either using pushbutton switches

connected to input terminals of the programmable controller or using the forced on/off function of a

programming panel. To change the offset and gain, just change the conversion constants of the FX-4DA.

Metering of the analog output is not needed for adjustment, however a program should be created in the MPU.

An example program for adjustment is shown below. The example shows that for channel CH2 of FX-4DA block

No. 1, the offset value is changed to 7 mA, and the gain value to 20 mA. Note that for CH1, CH3, and CH4, the

standard voltage output characteristics are set.

Note that the resolution (minimum possible change of analog output) of the FX-4DA is fixed.

I/O characteristics

The standard characteristics (factory default) are shown by the solid lines in the figure below. These

characteristics can be adjusted according to the conditions of the user's system.

Standard characteristics

of voltage output Standard characteristics of current

output (+4mA to +20mA) Standard characteristics of current

output (0mA to +20mA)

Digital input Digital input

-2,000

-10.24V -10V

+2,000+1,000

+10.235V

Outline of FROM and TO commands: For a detailed description, refer to the FX Programming Manual.

Read command

X010 FROM K1 K30 D0 K1 BFM #30 of special unit No.1 →D0

m1 m2 D• n

D•

Special unit or block number (K0 to K7, numbered from the MPU)

Buffer memory head address (K0 to K31)

Head device number of destination data. T, C, D, KnM, KnY, KnS, V, and Z can be used to

designate the head device. Each device number can be qualified using an index.

Number of transfer points (K1 to K32) (K1 to K16 for 32-bit command)

X011 TO K1 K1 D2 K2 D2 and D3 →BFM #1 and #2 of special unit No.1

m1, m2, n

S• :

If the FX-4DA does not operate properly, check the following items

①

②

③

④

⑤

⑥

Check the external wiring. Refer to section 3 of this manual.

Check status of the POWER indicator lamp (LED) of the FX-4DA.

On: The extension cable is properly connected.

Off or flash: Check connection of extension cable. Also check the 5 V power supply capacity.

Check status of the 24 V power indicator lamp (LED) of the FX-4DA.

On: 24V DC is supplied.

Off: Supply 24V DC (+10%) to the FX-4DA.

Check the status of the D-A conversion indicator lamp (LED) of the FX-4DA.

Flash: D-A conversion is normal.

On or off: The ambient conditions are not suitable for the FX-4DA, or the FX-4DA is defective.

Check that the external load resistance connected to each analog output terminal does not exceed the

capacity of the FX-4DA drive (voltage output: 2kΩto 1 MΩ/ current output: 500Ω).

Check the output voltage or current value using a voltmeter or ammeter, and confirm that the output meets

the I/O characteristics. If the output does not meet the I/O characteristics, adjust the offset and gain again.

Refer to section 8.

D0 and D1 = -2,000 to +2,000

D2 and D3 = 0 to +1,000

Set the data to

In specified

output range

No error

BFM #30 data (model code) of block No. 1 Transferred to

data register D4.

BFM #29 (b15 to b0) →(M25 to M10)

Reads out the status data.

M1 will be turned on when the model code is set to K3020

(FX-4DA).

D0 →BFM #1 (CH1 output)

D1 →BFM #2 (CH2 output)

D2 →BFM #3 (CH3 output)

D3 →BFM #4 (CH4 output)

⑧[BFM #29] Error status: When an error occurs, use the FROM command to read out the details of the error.

Error status

00+1,000

Analog

output

00+1,000

+20mA

Digital input

After adjustment, the I/O

characteristics will be as follows

+1,000

Analog

output

+7mA

●When X010 and X011 are off, transfer will not be executed, therefore the destination data value will not be

changed.

Note

To test the withstand voltage of the FX-4DA, connect all the terminals to the grounding terminal.

Guidelines for the safety of the user and protection of

the FX-4DA special function block

This manual has been written to be used by trained and competent personnel. This is

defined by the European directives for machinery, low voltage and EMC.

If in doubt at any stage during the installation of the FX-4DA always consult a professional

electrical engineer who is qualified and trained to the local and national standards. If in

doubt about the operation or use of the FX-4DA please consult the nearest Mitsubishi

Electric distributor.

Under no circumstances will Mitsubishi Electric be liable or responsible for any

consequential damage that may arise as a result of the installation or use of this equipment.

All examples and diagrams shown in this manual are intended only as an aid to

understanding the text, not to guarantee operation. Mitsubishi Electric will accept no

responsibility for actual use of the product based on these illustrative examples.

JY992D61001B Effective NOV. 1996

Specifications are subject

to change without notice.

7 CAUTION REGARDING OPERATION

8 ADJUSTMENT OF I/O CHARACTERISTICS 9 TROUBLESHOOTING

Output data abnormal

M20

M10

M8000

RUN

monitor

+10V

+5V

H2100 →BFM #0 (unit No.1)

CH1 and CH2: Voltage output CH3: Current output (+4 mA to +20 mA)

CH4: Current output (0 mA to +20 mA)

Same as above

Head device number of source data. T, C, D, KnX, KnM, KnY, KnS, V, Z, K, and H can be used

to designate the head device. Each device number can be qualified using an index.

m1 m2 S• n

Write command

+20mA

FROM

CMP

FROM

K3020

K30

K29

H2100

K4M10

•

Initial pulse

RUN

monitor

M8002

M8000

H2100

Write the data for CH1 to D0, CH2 to D1,

CH3 to D2 and CH4 to D3.

(H2100) →BFM#0

CH1 and CH2: Voltage output CH3: Current output (+4mA to

+20 mA)

CH4: Current output (0 mA to +20 mA)

Write data in respective data registers while observing the

following ranges:

Data register D0 and D1: -2,000 to +2,000 Data registers D2

and D3: 0 to +1,000

Data register D0 →BFM #1 (output to CH1)

Data register D1 →BFM #2 (output to CH2)

Data register D2 →BFM #3 (output to CH3)

Data register D3 →BFM #4 (output to CH4)

①

②

③

④

Turn off the power of the MPU, and then connect the FX-4DA. After that, wire the I/O lines of the

FX-4DA.

Set the MPU to STOP, and turn on the power. Write the above program then switch the MPU to RUN.

Analog values will be sent from D0 (BFM #1), D1 (BFM #2), D2 (BFM #3), and D3 (BFM #4) to the respective

output channels of the FX-4DA. When the MPU is in STOP, the analog values set before stopping the MPU

will remain output. (The output will be held.)

When the MPU is in STOP, the offset values can also be output. For a detailed description, refer to Section

5, ③.

Operation procedure

Program example

For the following program, CH1 and CH2 of the FX-4DA connected at special block position No. 1 are used as

voltage output channels, CH3 as a current output channel (+4 mA to +20 mA), and CH4 as a current output

channel (0 mA to +20 mA). When the MPU is in STOP, the output will be held. In addition, the status

information is used.

FX-4DA special

function block External

analog unit

Analog data cut

off circuit

24V DC power

supply

Power switch

[Example of preventive measure]

Output mode 0

Analog

output

Digital input

+2,047

-2,048

Bit Name Status when bit is set to "1" (turned on) Status when bit is set to "0"

(turned off)

b0 Error Error if any of b1 through b4 is turned on No error

b1 O/G error Offset/gain data in EEPROM is abnormal or a data setting error occurs. Offset/gain data normal

b2 Power supply error 24 VDC power failure Power supplied normally

b3 Hardware error Defective D-A converter or other hardware Non-defective hardware

b10 Range error The digital input or analog output value is out of the specified range. The input or output value is in

the specified range.

b12 G/O-Adjustment

prohibit status BFM #21 is not set to "1". Adjustable status

(BFM #21=1)

Bits b4 through b9, b11, b13 through b15 are not defined.

If the factory-set I/O characteristics are not changed and the status information is not used, you can operate the

FX-4DA using the following simple program. For the FROM and TO commands, refer to the FX Programming

Manual.

CH1 and CH2: Voltage output mode (-10 V to +10 V) CH3: Current output mode (+4 mA to +20 mA)

CH4: Current output mode (0 mA to +20 mA)

6 OPERATION AND PROGRAM EXAMPLES

⑨[BFM #30]The identification code for a special block is read using the FROM command.The identification

code for the FX-4DA unit is K3020.The MPU can use this facility in the program to identify the special block

before commencing any data transfer from and to the special block.

•

Note : BFM #'s marked E/(E).

Values of BFM #0, #5, and #21, (marked E) are stored in EEPROM memory of the FX-4DA. BFM #10 to #17

are copied to EEPROM when the gain/offset setting command BFM #8, #9 is used. Also, BFM #20 causes

resetting of the EEPROM memory. The EEPROM has a life of about 10,000 cycles (changes), so do not use

programs which frequently change these BFMs.

•A mode change of BFM#0 automatically involves a change of the corresponding offset and gain values.

Because of the time needed to write the new values to the internal EEPROM memory, a delay of 3 s is

required between instructions changing BFM#0 and instructions writing to the corresponding BFM#10

through BFM#17.

Therefore, a delay timer should be used before writing to BFM#10 through BFM#17.

H0010

K21

X10

T0 TO

K1 K21

K12

K13

SET

RST

K7000

K20000

H1100

K30

(K7000)→BFM#12

Sets the offset data.

(K1)→BFM#21

Permits adjustment of I/O characteristics.

(H0010)→BFM#0

Sets the mode of the output channel.

OPERATION START

(Gain value:20mA)

(H1100)→BFM#8

CH2 offset/gain setting command

(K2)→BFM#21

Inhibits adjustment of I/O characteristics

+4mA

+20mA

Analog

output

Downloaded from ManualsNet.com search engine

⑥[BFM #20] Initialize: When K1 is written in BFM #20, all values will be initialized to the factory-settings.

(Note that the BFM #20 data will override the BFM #21 data.) This initialize function is convenient if you have an

error in adjustment.

⑦[BFM #21] I/O characteristics adjustment inhibit: Setting BFM #21 to 2 inhibits the user from inadvertent

adjustment of I/O characteristics. The adjustment inhibit function, once set, will be valid until the Permit command

(BFM #21=1) is set. The initial value is 1 (Permit). The set value will be retained even after power-off.

Offset data

Gain value

Item Voltage output Current output

Analog output

range -10VDC to +10V DC (External load resistance:2k to

1M ) DC 0mA to +20mA (External load resistance:500 )

Digital input 16 bits, binary, with sign (Effective bits for numeric value:11 bits and sign bit (1 bit))

Resolution 5mV (10V 1/2000) 20 A (20mA 1/1000)

Total accuracy 1% (at full scale of +10V) 1% (at full scale of +20mA)

Conversion speed 2.1ms for 4 channels (Change in the number of channels used will not change the conversion speed.)

Isolation Photo-coupler isolation between analog and digtital circuits.

DC/DC converter isolation of power from FX base unit.

No isolation between analog channels.

External power

supply DC 24V 10% 200mA

Number of

occupied I/O

points 8 points taken from the FX expansion bus (can be either inputs or outputs)

Power

consumption 5V, 30mA (Internal power supply from MPU or powered extension unit)

I/O

characteristics

(Default: Mode0)

Follow the

procedure

described in

section 8 to

change.

Mode 0 (Voltage

output:-10V to +10V) At load resistance of

10k Mode 1 (Current

output:+4mA to +20mA) At load resistance of

250

Mode 2 (Current

output:0mA to +20mA) At load resistance of

250

BFM

#8(E) Offset/gain setting command CH1, CH2 Initial value H0000

#9(E) Offset/gain setting command CH3, CH4 Initial value H0000

#10 Offset data CH1 *1

Unit:mV or A

Initial offset value:0

Initial gain value:+5,000

#11 Gain data CH1 *2

#12 Offset data CH2 *1

#13 Gain data CH2 *2

#14 Offset data CH3 *1

#15 Gain data CH3 *2

#16 Offset data CH4 *1

#17 Gain data CH4 *2

#18, #19 Reserved

W#20(E) Initialize, initial value = 0

#21 E I/O characteristics adjustment inhibit (Initial value 1)

#22 #28 Reserved

#29 Error status

#30 K3020 identification code

#31 Reserved

●Weight: Approx. 0.3 kg ●Accessory: Special block number label

①Extension cable

②Power indicator lamp (LED)

5V power is supplied from the programmable

controller to light this indicator lamp.

③Power supply terminals

(Screw terminal: M3.5(0.14))

④Analog output terminals

(Screw terminals : M3.5 (0.14))

⑤24V power indicator lamp (LED)

24V DC power is supplied to the terminals of the FX-4DA

to light this indicator lamp.

⑥D-A conversion indicator lamp (LED)

Flashes at a high speed if D-A conversion is

performing without a problem.

⑦Hole for direct mounting (2-φ5.5) (0.22)

⑧Groove for DIN rail mounting

(Width of DIN rail : 35 mm 1.38")

⑨Hook for DIN rail

FX-4DA

SPECIAL FUNCTION BLOCK

USER'S GUIDE

JY992D61001B

This manual contains text, diagrams and explanations which will guide the reader in the correct installation and

operation of the FX-4DA special function block and should be read and understood before attempting to install

or use the unit.

Further information can be found in the FX PROGRAMMING MANUAL and FX SERIES HARDWARE MANUAL.

CONNECTION TO PROGRAMMABLE CONTROLLER

Various special blocks controlled by the FROM/TO commands, such as the analog input blocks high-speed

counter blocks, etc. can be connected to the FX or FX2C programmable controller (MPU), or connected to the

right side of the other extension blocks or units. Up to eight special blocks can be connected to a single MPU in

the numeric order of No. 0 to No. 7.

ENVIRONMENT SPECIFICATIONS

The environment specifications are the same as those for the MPU of the programmable controller. Refer to the

FX-series Hardware Manual.

PERFORMANCE SPECIFICATIONS

DC24V±10%200mA

FX-4DA

V+

V-

I+

I-

V+

V-

I+

I-

*1 *2

Mixedoutputfromthesamechannelisnotpossible.

*3 Inverter,etc.

Extension cable

Class 3

Grounding

(100Ωor less) P C

Current output

Recorder,etc.

Commands sent from the programmable controller can

change the mode. The voltage/current output mode

selected will determine the output terminals used.

POWER

RUN

BATT.V

PROG¥E

CPU¥E

L N 24+ 24+ R UN X1 X3 X5 X7 X11 X13 X15 X17 X21 X23 X25 X27

COM X0 X2 X4 X6 X10 X12 X14 X16 X20 X22 X24 X26COM

`bWT `QUSu

Y0 Y2

COM1 Y1 Y3 COM2

Y7 COM3

Y10

Y11

Y12

Y13 COM4

Y14

Y15

Y16

Y17

Y20

Y21

Y22

Y23

Y24

Y25

Y26

Y27COM5

POWER

S/S

X4 X6

X5 X7

24V

A-D

POWER

READY

CH1

OFFSET

GAIN

CH3

CH2

CH4

V+ COM

I+ FG

CH1

I+ ef ef

u { bnl

h { h {

bnlu {bnlu {

ef

CH2 CH3 CH4

DC24V

PULL

24V

D-A

POWER

V+ I+

V- I-

CH1

DC24V

V- h | h |

u { h {

u | u |

h {u {h {u {

h |

CH2 CH3 CH4

POWER

POO `QSOu`b

L N X1 X3 X5 X7 X1 X3 X5 X724V

X0 X2 X4 X6 X0 X2 X4 X6

Y0 Y2 Y4 Y6

COM1 Y1 Y3 COM2 Y5 Y7 COM3 COM4

SG0VS/S

POWER

FG FG

L+ L+ I-I-

L- L-

24V

A-D

CH1 CH2

DC24V

In addition to the above functions, the buffer memories can adjust the I/O characteristics of the FX-4DA, and

report the status of the FX-4DA to the programmable controller.

Switching the output mode resets the I/O characteristics to the factory-set characteristics. Refer to the

performance specifications described in section 4.

Example: H2110 CH1: Voltage output (-10 V to +10 V)

CH2 and CH3: Current output (+4 mA to +20 mA)

CH4: Current output (0 mA to +20 mA)

②[BFM #1, #2, #3 and #4]: Output data channels CH1, CH2, CH3, and CH4

BFM #1: Output data of CH1 (Initial value: 0) BFM #2: Output data of CH2 (Initial value: 0)

BFM #3: Output data of CH3 (Initial value: 0) BFM #4: Output data of CH4 (Initial value: 0)

③[BFM #5]: Data holding mode: While the programmable controller is in the STOP mode, the last output value

in the RUN mode will be held. To reset the value to the offset value, write the hexadecimal value in BFM #5

as follows:

❍= 0:Sets the voltage output mode (-10 V to +10 V).

❍= 1:Sets the current output mode (+4 mA to 20 mA).

❍= 2:Sets the current output mode (0 mA to +20 mA).

CH4 CH3 CH2 CH1

❍= 0: Holds the output.

❍= 1: Resets to the offset value.

CH4 CH3 CH2 CH1

1 INTRODUCTION

●The FX-4DA analog special function block has four output channels. The output channels take a digital value

and output an equivalent analog signal. This is called a D/A conversion. The FX-4DA has a maximum

resolution of 12 bits.

●The selection of voltage or current based input/output is by user wiring. Analog ranges of -10 to 10V

(resolution: 5mV), and/or 0 to 20mA (resolution: 20µA) maybe selected independently for each channel.

●FX programmable controllers versions 2.0 or later (those with serial number 13XXXX or larger) are required;

as these units have the TO/FROM applied instructions in their instruction set. Data transfer between the

FX-4DA and the FX base unit is by buffer memory exchange. There are 32 buffer memories (each of 16 bits)

in the FX-4DA.

●The FX-4DA occupies 8 points of I/O on the FX, FX2C expansion bus. The 8 points can be allocated from

either inputs or outputs. The FX-4DA draws 30mA from the 5V rail of the base unit or powered extension unit.

For M3.5 (0.14)

●

Be sure to use the crimp-style terminals that satisfy

the dimensional requirements shown in the left figure.

Apply 0.5 to 0.8 N•m (5 to 8 kgf•cm) torque to tighten

the terminals. Firmly tighten the terminals to prevent

abnormal operation.

Handling of crimp-style terminal

WIRING: The terminal layout shown below may differ from the actual layout. For the correct terminal layout,

refer to section 2 Externel Dimensions and Parts.

FX-48MR

X000-X027

Y000-Y027

FX-4AD

Special block

No.0

FX-8EX

X030-

X037

FX-4DA

Special block

No.1

FX-32ER

X040-X057

Y030-Y047

FX-2AD-PT

Special block

No.2

*4:Connect the terminal on the FX-4DA with the

terminal on the MPU of the programmable

controller.

*5:Shorting the voltage output terminal or connecting

the current output load to the voltage output

terminal may damage the FX-4DA.

*6:The 24V DC service power of the programmable

controller can also be used.

*7: Do not connect any unit to the unused terminal

*1:Use a twisted pair shielded cable for the analog

output. This cable should be wired away from power

lines or any other lines which could induce noise.

*2:Apply 1-point grounding at the load side of the

output cable (class 3 grounding: 100Ωor less).

*3:If electrical noise or a voltage ripple exists at

the output, connect a smoothing capacitor of 0.1 to

0.47µF, 25V.

Data is transmitted between the FX-4DA and the MPU via buffer memories (16-bit 32-point RAM).

Buffer memories marked "W" can be

written to using the T0 instruction in the

MPU.

The status of BFM #0, #5, and #21,

(marked E) will be written to EEPROM,

therefore the set values will be retained

even after turning off the power.

Example: H0011•••••CH1 and CH2 = Offset value CH3 and CH4 = Output holding

Buffer memories marked "W" can be written to

using the TO instruction in the MPU.

The status of BFM #0, #5, and #21, (marked E)

will be written to EEPROM, therefore the set

values will be retained even after turning off the

power. Actual analog output value

when corresponding output

data (BFM #1 through #4) is 0

Actual analog output value

when corresponding output

data (BFM #1 through #4) is

+1,000

*1:

*2:

*3: When current output mode 1 (+4 mA to +20

mA) is set, the offset data will be

automatically set to +4,000 and the gain data

to +20,000. When the current output mode 2

(0 mA to +20 mA) is set, the offset data will

be automatically set to 0 and the gain data to

+20,000.

BFM Description

#0 E Output mode select. Factory setting H0000

#1 Output data (Signed 16 bits binary; actual value

11 bits + sign)

#1: CH1, #2: CH2, #3: CH3, #4: CH4

#5 E Data holding mode. Factory setting H0000

#6 #7 Reserved

①[BFM #0] Output mode select: The value of BFM #0 switches the analog output between voltage and current

on each channel. It takes the form of a 4 digit hexadecimal number. The first digit will be the command for

channel 1 (CH1), and the second digit for channel 2 (CH2) etc. The numeric values of these four digits

respectively represent the following items:

+20mA

0Digital input

Digital input

+1,000

5 ALLOCATION OF BUFFER MEMORIES (BFM)

4 Specifications

-10.24V

-2,048

+2,047

+2,000

+1,000

+10.235V

-2,000

Analog

output

}Output

mode

CH1

CH2 *7

DC/DC

converter

+15V

6.8 mm

(0.27inches)

or less

④[BFM #8 and #9] Offset/gain setting command: Changes offset and gain values of channels CH1 through CH4 by writing 1 to

the corresponding Hex digits of BFM #8 or #9. The current values will be valid until this command is output.

❍= 0: No changes done.

❍= 1: Change data value.

(Program example : see section 8.)

⑤[BFM #10 through #17] Offset/gain data: The offset and gain values are changed by writing new data to BFM #10 through #17.

The units of the data to be written is mV or µA. The data should be written and then BFM #8 and #9 set. Note that the data

value will be rounded down to the nearest 5mV or 20µA.

The offset and gain data values are reset to zero at power ON. Howerer, using the offset/gain setting

commands (BFM #8, #9) causes the values to be saved to EEPROM. It is not neccesary to write the data

a second time.

Note

BFM #8 BFM #9

2 EXTERNAL DIMENSIONS AND PARTS

3 INSTALLATION AND WIRING

Analog

output

+4mA

+20mA

Dimensions:

mm(inches)

-10V Digital input

Analog

output +10V

DC24V+

DC24V-

±±

Ω

µ:

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FNC78

FROM

Read BFM

FNC79

Write BFM

(Offset value:7mA)

(K20000)→BFM#13

Sets the gain data.

OPERATION END

HEAD OFFICE : MITSUBISHI DENKI BLDG MARUNOUCHI TOKYO 100 TELEX : J24532 CABLE MELCO TOKYO

HIMEJI WORKS : 840, CHIYODA CHO, HIMEJI, JAPAN

Manual number : JY992D61001

Manual revison : B

Date : November 1996

●••••••Gain value: Analog output value when the digital input is +1,000

▲••••••Offset value: Analog output value when the digital input is 0

When the slope of the I/O characteristic line is steep: Slight changes to the digital input will greatly increase

or reduce the analog output.

When the slope of the I/O characteristic line is gentle: Slight changes to the digital input will not always

change the analog output.

Check whether the output wiring and/or expansion cables are properly connected on FX-4DA analog special

function block.

Check that the FX system configuration rules have not been broken, i.e. the number of blocks does not

exceed 8 and the total system I/O is equal or less than 256 I/O.

Ensure that the correct output mode has been selected for the application.

Check that there is no power overload on either the 5V or 24V power source, remember the loading on the FX

MPU or a powered extension unit varies according to the number of extension blocks or special function

blocks connected.

Put the main processing unit into RUN.

After turning on or off the 24V DC power for analog signals, the analog output may fluctuate for approximately 1 second. This is

due to time delays in the power supply from the MPU or differences in start time. For this reason, be sure to take preventive

measures so that this output fluctuation will not affect the external units.

①

②

③

④

⑤

⑥

Adjustment of I/O Characteristics

To adjust the I/O characteristics, set the offset and gain of the FX-4DA either using pushbutton switches

connected to input terminals of the programmable controller or using the forced on/off function of a

programming panel. To change the offset and gain, just change the conversion constants of the FX-4DA.

Metering of the analog output is not needed for adjustment, however a program should be created in the MPU.

An example program for adjustment is shown below. The example shows that for channel CH2 of FX-4DA block

No. 1, the offset value is changed to 7 mA, and the gain value to 20 mA. Note that for CH1, CH3, and CH4, the

standard voltage output characteristics are set.

Note that the resolution (minimum possible change of analog output) of the FX-4DA is fixed.

I/O characteristics

The standard characteristics (factory default) are shown by the solid lines in the figure below. These

characteristics can be adjusted according to the conditions of the user's system.

Standard characteristics

of voltage output Standard characteristics of current

output (+4mA to +20mA) Standard characteristics of current

output (0mA to +20mA)

Digital input Digital input

-2,000

-10.24V -10V

+2,000+1,000

+10.235V

Outline of FROM and TO commands: For a detailed description, refer to the FX Programming Manual.

Read command

X010 FROM K1 K30 D0 K1 BFM #30 of special unit No.1 →D0

m1 m2 D• n

D•

Special unit or block number (K0 to K7, numbered from the MPU)

Buffer memory head address (K0 to K31)

Head device number of destination data. T, C, D, KnM, KnY, KnS, V, and Z can be used to

designate the head device. Each device number can be qualified using an index.

Number of transfer points (K1 to K32) (K1 to K16 for 32-bit command)

X011 TO K1 K1 D2 K2 D2 and D3 →BFM #1 and #2 of special unit No.1

m1, m2, n

S• :

If the FX-4DA does not operate properly, check the following items

①

②

③

④

⑤

⑥

Check the external wiring. Refer to section 3 of this manual.

Check status of the POWER indicator lamp (LED) of the FX-4DA.

On: The extension cable is properly connected.

Off or flash: Check connection of extension cable. Also check the 5 V power supply capacity.

Check status of the 24 V power indicator lamp (LED) of the FX-4DA.

On: 24V DC is supplied.

Off: Supply 24V DC (+10%) to the FX-4DA.

Check the status of the D-A conversion indicator lamp (LED) of the FX-4DA.

Flash: D-A conversion is normal.

On or off: The ambient conditions are not suitable for the FX-4DA, or the FX-4DA is defective.

Check that the external load resistance connected to each analog output terminal does not exceed the

capacity of the FX-4DA drive (voltage output: 2kΩto 1 MΩ/ current output: 500Ω).

Check the output voltage or current value using a voltmeter or ammeter, and confirm that the output meets

the I/O characteristics. If the output does not meet the I/O characteristics, adjust the offset and gain again.

Refer to section 8.

D0 and D1 = -2,000 to +2,000

D2 and D3 = 0 to +1,000

Set the data to

In specified

output range

No error

BFM #30 data (model code) of block No. 1 Transferred to

data register D4.

BFM #29 (b15 to b0) →(M25 to M10)

Reads out the status data.

M1 will be turned on when the model code is set to K3020

(FX-4DA).

D0 →BFM #1 (CH1 output)

D1 →BFM #2 (CH2 output)

D2 →BFM #3 (CH3 output)

D3 →BFM #4 (CH4 output)

⑧[BFM #29] Error status: When an error occurs, use the FROM command to read out the details of the error.

Error status

00+1,000

Analog

output

00+1,000

+20mA

Digital input

After adjustment, the I/O

characteristics will be as follows

+1,000

Analog

output

+7mA

●When X010 and X011 are off, transfer will not be executed, therefore the destination data value will not be

changed.

Note

To test the withstand voltage of the FX-4DA, connect all the terminals to the grounding terminal.

Guidelines for the safety of the user and protection of

the FX-4DA special function block

This manual has been written to be used by trained and competent personnel. This is

defined by the European directives for machinery, low voltage and EMC.

If in doubt at any stage during the installation of the FX-4DA always consult a professional

electrical engineer who is qualified and trained to the local and national standards. If in

doubt about the operation or use of the FX-4DA please consult the nearest Mitsubishi

Electric distributor.

Under no circumstances will Mitsubishi Electric be liable or responsible for any

consequential damage that may arise as a result of the installation or use of this equipment.

All examples and diagrams shown in this manual are intended only as an aid to

understanding the text, not to guarantee operation. Mitsubishi Electric will accept no

responsibility for actual use of the product based on these illustrative examples.

JY992D61001B Effective NOV. 1996

Specifications are subject

to change without notice.

7 CAUTION REGARDING OPERATION

8 ADJUSTMENT OF I/O CHARACTERISTICS 9 TROUBLESHOOTING

Output data abnormal

M20

M10

M8000

RUN

monitor

+10V

+5V

H2100 →BFM #0 (unit No.1)

CH1 and CH2: Voltage output CH3: Current output (+4 mA to +20 mA)

CH4: Current output (0 mA to +20 mA)

Same as above

Head device number of source data. T, C, D, KnX, KnM, KnY, KnS, V, Z, K, and H can be used

to designate the head device. Each device number can be qualified using an index.

m1 m2 S• n

Write command

+20mA

FROM

CMP

FROM

K3020

K30

K29

H2100

K4M10

•

Initial pulse

RUN

monitor

M8002

M8000

H2100

Write the data for CH1 to D0, CH2 to D1,

CH3 to D2 and CH4 to D3.

(H2100) →BFM#0

CH1 and CH2: Voltage output CH3: Current output (+4mA to

+20 mA)

CH4: Current output (0 mA to +20 mA)

Write data in respective data registers while observing the

following ranges:

Data register D0 and D1: -2,000 to +2,000 Data registers D2

and D3: 0 to +1,000

Data register D0 →BFM #1 (output to CH1)

Data register D1 →BFM #2 (output to CH2)

Data register D2 →BFM #3 (output to CH3)

Data register D3 →BFM #4 (output to CH4)

①

②

③

④

Turn off the power of the MPU, and then connect the FX-4DA. After that, wire the I/O lines of the

FX-4DA.

Set the MPU to STOP, and turn on the power. Write the above program then switch the MPU to RUN.

Analog values will be sent from D0 (BFM #1), D1 (BFM #2), D2 (BFM #3), and D3 (BFM #4) to the respective

output channels of the FX-4DA. When the MPU is in STOP, the analog values set before stopping the MPU

will remain output. (The output will be held.)

When the MPU is in STOP, the offset values can also be output. For a detailed description, refer to Section

5, ③.

Operation procedure

Program example

For the following program, CH1 and CH2 of the FX-4DA connected at special block position No. 1 are used as

voltage output channels, CH3 as a current output channel (+4 mA to +20 mA), and CH4 as a current output

channel (0 mA to +20 mA). When the MPU is in STOP, the output will be held. In addition, the status

information is used.

FX-4DA special

function block External

analog unit

Analog data cut

off circuit

24V DC power

supply

Power switch

[Example of preventive measure]

Output mode 0

Analog

output

Digital input

+2,047

-2,048

Bit Name Status when bit is set to "1" (turned on) Status when bit is set to "0"

(turned off)

b0 Error Error if any of b1 through b4 is turned on No error

b1 O/G error Offset/gain data in EEPROM is abnormal or a data setting error occurs. Offset/gain data normal

b2 Power supply error 24 VDC power failure Power supplied normally

b3 Hardware error Defective D-A converter or other hardware Non-defective hardware

b10 Range error The digital input or analog output value is out of the specified range. The input or output value is in

the specified range.

b12 G/O-Adjustment

prohibit status BFM #21 is not set to "1". Adjustable status

(BFM #21=1)

Bits b4 through b9, b11, b13 through b15 are not defined.

If the factory-set I/O characteristics are not changed and the status information is not used, you can operate the

FX-4DA using the following simple program. For the FROM and TO commands, refer to the FX Programming

Manual.

CH1 and CH2: Voltage output mode (-10 V to +10 V) CH3: Current output mode (+4 mA to +20 mA)

CH4: Current output mode (0 mA to +20 mA)

6 OPERATION AND PROGRAM EXAMPLES

⑨[BFM #30]The identification code for a special block is read using the FROM command.The identification

code for the FX-4DA unit is K3020.The MPU can use this facility in the program to identify the special block

before commencing any data transfer from and to the special block.

•

Note : BFM #'s marked E/(E).

Values of BFM #0, #5, and #21, (marked E) are stored in EEPROM memory of the FX-4DA. BFM #10 to #17

are copied to EEPROM when the gain/offset setting command BFM #8, #9 is used. Also, BFM #20 causes

resetting of the EEPROM memory. The EEPROM has a life of about 10,000 cycles (changes), so do not use

programs which frequently change these BFMs.

•A mode change of BFM#0 automatically involves a change of the corresponding offset and gain values.

Because of the time needed to write the new values to the internal EEPROM memory, a delay of 3 s is

required between instructions changing BFM#0 and instructions writing to the corresponding BFM#10

through BFM#17.

Therefore, a delay timer should be used before writing to BFM#10 through BFM#17.

H0010

K21

X10

T0 TO

K1 K21

K12

K13

SET

RST

K7000

K20000

H1100

K30

(K7000)→BFM#12

Sets the offset data.

(K1)→BFM#21

Permits adjustment of I/O characteristics.

(H0010)→BFM#0

Sets the mode of the output channel.

OPERATION START

(Gain value:20mA)

(H1100)→BFM#8

CH2 offset/gain setting command

(K2)→BFM#21

Inhibits adjustment of I/O characteristics

+4mA

+20mA

Analog

output

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