Panasonic FP7 Series User manual

PROGRAMMABLE CONTROLLERS
User's Manual
FP7 Thermocouple and
RTD Input Units
ACGM0705V1.1EN
2021.05industry.panasonic.eu

Before beginning
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whole or part, without written consent of Panasonic Electric Works Europe AG (PEWEU).
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85521 Ottobrunn, Germany
Tel: [phone]
Limited warranty
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free of charge. Exceptions include:
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described in the manual.
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2 FP7 Thermocouple and RTD Units User's Manual

FP7 Thermocouple and RTD Units User's Manual 3
Warnings used in this manual
One or more of the following warnings may be used in this documentation:
DANGER
Indicates a hazardous situation which, if not avoided,
will result in death or serious injury.
WARNING
Indicates a hazardous situation which, if not avoided,
could result in serious or moderate injury.
CAUTION
Indicates a hazardous situation which, if not avoided,
could result in minor or moderate injury.
NOTICE
Indicates a property damage message.

4 FP7 Thermocouple and RTD Units User's Manual
Scope of this manual
This manual covers:
Unit functions
Restrictions on unit combinations
Installation, wiring, and operating instructions
I/O allocation
Configuration settings
Time charts
Conversion characteristics
Optional settings for averaging, offset and gain adjustment, limit alarm,
scale conversion, etc.
Troubleshooting information
An appendix with:
Hardware specifications
Unit memory addresses
Unit dimensions
Please refer to the FP Series Programming Manual or to the online help of
Control FPWIN Pro for information on:
System instructions
Special internal flags
Data registers
System variables
Memory area tables
Programming examples
For documentation on other units used with the FP7, please refer to the
hardware manual for that unit.
All manuals can be downloaded from the Panasonic Web site
(industry.panasonic.eu).

FP7 Thermocouple and RTD Units User's Manual 5
Safety measures
Operating environment
After installing the unit, make sure to use it within the range of the general
specifications:
 Ambient temperature: 0°C to +55°C
 Ambient humidity: 10%–95% RH (at 25°C, non-condensing)
 Pollution degree: 2
 Do not use the unit in the following environments:
 Direct sunlight
 Sudden temperature changes causing condensation
 Inflammable or corrosive gases
 Excessive airborne dust, metal particles or salts
 Benzine, paint thinner, alcohol or other organic solvents, or strong
alkaline solutions such as ammonia or caustic soda
 Vibration, shock, or direct drop of water
 Influence from power transmission lines, high voltage equipment,
power cables, power equipment, radio transmitters, or any other
equipment that would generate high switching surges. Maintain at
least 100mm of space between these devices and the unit.
Static electricity
Before touching the unit or equipment, always touch some grounded metal
to discharge any static electricity you may have generated (especially in
dry locations). The discharge of static electricity can damage parts and
equipment.
Protection of power supply
 Use a twisted power supply wire.
 Insulate the wiring systems to the CPU, input/output devices, and me-
chanical power apparatus.
 An insulated power supply with an internal protective circuit should be
used (FP power supply). The power supply for the CPU is a
non-insulated circuit, so if an incorrect voltage is directly applied, the
internal circuit may be damaged or destroyed.

6 FP7 Thermocouple and RTD Units User's Manual
If using a power supply device without an internal protective circuit,
always make sure power is supplied to the unit through a protective
element such as a fuse.
Be sure to supply power to a CPU and an expansion unit from the same
power supply, and turn the power on and off simultaneously for both.
Power supply sequence
Make sure the power supply of the CPU turns off before the power supply
for input and output. If the power supply for input and output is turned off
first, the CPU will detect the input fluctuations and may begin an unex-
pected operation.
Before turning on the power
When turning on the power for the first time, be sure to take the precau-
tions given below.
During installation, check that there are no scraps of wiring, particularly
conductive fragments, adhering to the unit.
Verify that the power supply wiring, I/O wiring, and power supply volt-
age are all correct.
Sufficiently tighten the installation and terminal screws.
Set the operation mode selector to PROG mode.
Request concerning program storage
To prevent the accidental loss of programs, the user should consider the
following measures:
Backing up programs: To avoid accidentally losing programs, destroying
files, or overwriting the contents of a file, use the backup or export
functions of Control FPWIN Pro and store the files in a safe place. Addi-
tionally, you can print out the entire project documentation.
Specifying passwords: The password setting is designed to avoid pro-
grams being accidentally overwritten. If the password is forgotten,
however, it will be impossible to overwrite the program even if you
want to. Also, if a password is forcibly bypassed, the program is delet-
ed. Therefore, please note the password in a safe location.

Table of contents
FP7 Thermocouple and RTD Units User's Manual 7
Table of contents
Overview .................................................................................................................................... 91.
1.1 Features .............................................................................................................................................. 9
1.2 Unit types ........................................................................................................................................... 10
1.3 Basic operation .................................................................................................................................. 11
1.4 Restrictions on unit combination ....................................................................................................... 12
1.5 Parts and functions ............................................................................................................................ 13
Wiring ...................................................................................................................................... 142.
2.1 Wiring the terminal block ................................................................................................................... 14
2.2 Connecting the analog inputs ............................................................................................................ 16
2.2.1 Thermocouple input............................................................................................................... 17
2.2.2 Voltage input ......................................................................................................................... 18
2.2.3 Current input .......................................................................................................................... 19
2.2.4 RTD input .............................................................................................................................. 20
I/O allocation ........................................................................................................................... 213.
3.1 General .............................................................................................................................................. 21
3.2 Digital values and status flags ........................................................................................................... 21
3.3 Control flags ...................................................................................................................................... 24
Operation ................................................................................................................................. 264.
4.1 Reading of analog input data ............................................................................................................ 26
4.2 Conversion time ................................................................................................................................. 27
Conversion characteristics .................................................................................................... 315.
5.1 Temperature range ............................................................................................................................ 31
5.1.1 Thermocouple input (AFP7TC8) ........................................................................................... 31
5.1.2 RTD input (AFP7RTD) .......................................................................................................... 33
5.2 Voltage range (AFP7TC8) ................................................................................................................. 34
5.2.1 -10 to +10V (0.32mV, 1/62500) ............................................................................................. 34
5.2.2 0 to +5V (0.16mV, 1/31250) .................................................................................................. 35
5.2.3 1 to +5V (0.16mV, 1/25000) .................................................................................................. 36
5.2.4 -100 to +100mV (0.32mV, 1/62500) ...................................................................................... 37
5.3 Current range (AFP7TC8) ................................................................................................................. 38
5.3.1 0 to +20mA (0.64μA, 1/31250) .............................................................................................. 38
5.3.2 +4 to +20mA (0.64μA, 1/25000) ............................................................................................ 39
Unit configuration ................................................................................................................... 406.
6.1 Advanced settings ............................................................................................................................. 40
6.2 List of advanced configuration settings ............................................................................................. 40

Table of contents
8 FP7 Thermocouple and RTD Units User's Manual
6.3 Average processing ........................................................................................................................... 43
6.3.1 Count-based average ............................................................................................................ 43
6.3.2 Time-based average ............................................................................................................. 44
6.3.3 Moving average ..................................................................................................................... 45
6.4 Offset and gain adjustment ................................................................................................................ 46
6.5 Scale conversion ............................................................................................................................... 47
6.6 Limit alarm ......................................................................................................................................... 48
6.7 Maximum and minimum value hold function ..................................................................................... 51
6.8 Disconnection detection .................................................................................................................... 54
6.9 Configuration by program .................................................................................................................. 58
Troubleshooting ..................................................................................................................... 607.
7.1 Failure in reading analog input data .................................................................................................. 60
7.2 Unstable analog input value .............................................................................................................. 60
7.3 Incorrect digital output values with current input ............................................................................... 60
Specifications ......................................................................................................................... 618.
8.1 General specifications ....................................................................................................................... 61
8.2 Performance specifications ............................................................................................................... 62
8.3 I/O allocation ...................................................................................................................................... 65
8.3.1 Digital values and status flags ............................................................................................... 65
8.3.2 Control flags .......................................................................................................................... 67
8.4 Unit memory addresses ..................................................................................................................... 69
8.4.1 Allocation of unit memory addresses .................................................................................... 69
8.4.2 Bit settings in unit memory areas .......................................................................................... 71
8.5 Dimensions ........................................................................................................................................ 76

Overview
FP7 Thermocouple and RTD Units User's Manual 9
Chapter 1
Overview
1.1 Features
The analog unit obtains temperature data using a thermocouple or re-
sistance temperature detector (RTD) and converts the data internally into
digital values.
The thermocouple and RTD units have 8 channels to receive analog in-
put data.
The resolution of the temperature data is 0.1°C.
Ten types of thermocouples (K, J, T, N, R, S, B, E, PLII, WRe5-26) and
three types of RTDs (Pt100, JPt100, Pt1000) are supported for each
channel.
The voltage and current inputs of the thermocouple unit can be used in
combination with a thermocouple input.
Analog values are converted into digital data with up to 16 bits in a res-
olution range of 1/25000–1/62500.
Optional functions
Name
Description
Average pro-
cessing
With average processing, count-based, time-based, or moving
averages can be obtained from the analog input values. The
average values are stored in the CPU's input area as digital
values.
Offset/gain pro-
cessing
Offset and gain adjustment can be used to correct offset or
scaling errors. The offset and gain adjustments are made to the
converted data before it is written to the CPU's input area.

Overview
10 FP7 Thermocouple and RTD Units User's Manual
Name
Description
Scale conversion
Use scale conversion to set an easy-to-use data range. The
digital output values are scaled to values in the specified range
between preset minimum and maximum values before they are
written to the CPU's input area. This function is convenient if
used for unit conversion. (Scale conversion is only available for
the voltage and current inputs of AFP7TC8.)
Limit alarm
This function compares the acquired data with the specified
upper and lower limits and turns the corresponding flags to
TRUE when these limits are exceeded.
Maximum and
minimum value
hold
This function stores the maximum and minimum values of the
acquired data in the unit memory area for each channel.
Disconnection
detection
AFP7TC8:
The disconnection detection flag turns to TRUE and the ERROR
LED will light if the analog input value does not reach a certain
threshold. Valid for thermocouple input and 1–5V and 4–20mA
ranges only.
AFP7RTD8:
If the line at terminal A or both lines at terminal B and terminal
b are disconnected, the digital output value is 30000.
1.2 Unit types
Name
Description
Product
no.
Thermocouple
unit
8 channels
Thermocouple input:
K1, K2, J1, J2, T, N, R, S, B, E, PLII,
WRe5-26
Voltage input:
-10 to +10V, 0 to +5V, +1 to +5V, -100
to +100mV
Current input:
0 to +20mA, 4 to +20mA
AFP7TC8
RTD unit
8 channels
Pt100-1, Pt100-2, JPt100-1, JPt100-2,
Pt1000
AFP7RTD8

Overview
FP7 Thermocouple and RTD Units User's Manual 11
1.3 Basic operation
The processing of analog input data takes place in three steps:
1. Reception of analog signals
The analog unit receives analog signals from the thermocouple, RTD, or
external devices.
2. Analog to digital conversion
The analog input values are converted to digital output values automat-
ically and in sequence.
3. Storage of digital values
A user program is needed to read the digital output values from the
CPU's input area (WX).
Unit configuration
The unit configuration, which is stored in the unit memory (UM), can be
changed via the [Advanced] button in the "I/O map and unit configuration"
dialog or by specifying the settings in a user program. The following items
can be set:
 Power frequency
 Conversion time (AFP7TC8 only)
 Average processing (count-based, time-based, or moving average)
 Offset/gain processing
 Scale conversion (AFP7TC8 only)
 Limit alarm
 Maximum and minimum value hold
 Disconnection detection

Overview
12 FP7 Thermocouple and RTD Units User's Manual
1.4 Restrictions on unit combination
Current consumption
When designing the system, make sure the total current consumption of all
units used together with the analog unit is within the capacity of the power
supply. The unit has the following internal current consumption:
Name
Product no.
Current consumption
Thermocouple unit
AFP7TC8
80mA
RTD unit
AFP7RTD
65mA
Firmware version
The following CPU firmware versions are required for using the analog
units:
Name
Version
CPU
Version 2.0 or later

Overview
FP7 Thermocouple and RTD Units User's Manual 13
1.5 Parts and functions
QOperation status LEDs –Display the current operation mode or the oc-
currence of an error.
LED
Color
Description
–
Blue
Lights when the CPU power is on.
ERROR
Red
Lights when the configuration settings are beyond the allowa-
ble range or A/D conversion is not possible.
ALARM
Red
Lights when a hardware error occurs.
WAnalog input terminal block –Remove the terminal block to facilitate
wiring. Crimp terminals for M3 can be used.
EDIN rail attachment lever –Used for easy attachment to a DIN rail.
RExpansion connector –Connects the unit to the internal circuit of I/O
units and intelligent units.
TFixing hook –Used to fix expansion units.

Wiring
14 FP7 Thermocouple and RTD Units User's Manual
Chapter 2
Wiring
2.1 Wiring the terminal block
Screw-type terminal blocks are used. The suitable wires are given below.
Suitable wire
No. of wires
Size
Cross-sectional area [mm2]
1
AWG28–16
0.08–1.25
2
AWG28–20
0.08–0.5
Wiring method
Precautions
 When removing the wire's insulation, be careful not to scratch the core
wire.
 Do not twist the wires to connect them.
 Do not solder the wires to connect them. The solder may break due to
vibration.
 After wiring, make sure no wire is under stress.
 If the socket in the terminal block closes upon counter-clockwise rota-
tion, the connection is wrong. Disconnect the wire, check the terminal
hole, and then re-connect the wire.

Wiring
FP7 Thermocouple and RTD Units User's Manual 15
1. Insert a screwdriver between terminal block and housing
2. Remove the terminal block
3. Remove a portion of the wire's insulation
4. Insert the wire into the terminal block until it touches the back of the
socket
5. Turn the screw clockwise to fix the wire in place
The tightening torque should be 0.22–0.25Nm or less.
6. Reattach the terminal block to the unit
P r o c e d u r e

Wiring
16 FP7 Thermocouple and RTD Units User's Manual
2.2 Connecting the analog inputs
Precautions
 Thermocouple input: Mind the polarity of the thermocouple when con-
necting the wires. When extending the signal line of the thermocouple,
use its compensating lead wire. It is recommended to ground the unit
using the shielded compensating lead wire.
 Current input/Voltage input: Use double-core twisted-pair shielded
wires. We recommend grounding them. However, depending on the
conditions of the external noise, it may be better not to ground the
shielding.
 RTD input: Use thick copper wires having an insulation as specified by
JIS C 3307 and JIS C 3401 to prevent large increases in electric re-
sistance. It is recommended to ground the unit using the shielded
compensating lead wire.
 Do not place the analog input wires close to power lines or load lines
other than PLC wires, and do not bundle them with other wires.

Wiring
FP7 Thermocouple and RTD Units User's Manual 17
2.2.1 Thermocouple input
Wiring and internal circuit diagram
Q
Thermocouple
W
PhotoMOS relay
E
Multiplexer
R
A/D conversion circuit
T
Internal circuit
Terminal layout
CH
Channel
V/I
Voltage/Current
COM
Common input
N.C.
Used by the system. Do not connect anything.

Wiring
18 FP7 Thermocouple and RTD Units User's Manual
2.2.2 Voltage input
Wiring and internal circuit diagram
Q
Input device
W
PhotoMOS relay
E
Multiplexer
R
A/D conversion circuit
T
Internal circuit
Terminal layout
CH
Channel
V/I
Voltage/Current
COM
Common input
N.C.
Used by the system. Do not connect anything.

Wiring
FP7 Thermocouple and RTD Units User's Manual 19
2.2.3 Current input
Wiring and internal circuit diagram
Q
Input device
W
PhotoMOS relay
E
Multiplexer
R
A/D conversion circuit
T
Internal circuit
Y
Connect the In terminals.
Terminal layout
CH
Channel
V/I
Voltage/Current
COM
Common input
N.C.
Used by the system. Do not connect anything.

Wiring
20 FP7 Thermocouple and RTD Units User's Manual
2.2.4 RTD input
Wiring and internal circuit diagram
Q
RTD input
W
PhotoMOS relay
E
Multiplexer
R
A/D conversion circuit
T
Internal circuit
Terminal layout
CH
Channel
N.C.
Used by the system. Do not connect anything.