Onicon FT-3000 Series User manual
ON
I
CON
Flow and Energy Measurement
FT-3000 SERIES
Inline Electromagnetic Flow Meter
MODBUS Supplement
DOC-0001665 Rev.C
FT-3000 SERIES MODBUS SUPPLEMENT
ONICON Incorporated • 727.447.6140 • www.onicon.com
Page 2
TABLE OF CONTENTS
1.0 INTRODUCTION............................................................................................................................................... 3
1.1 PURPOSE OF THIS GUIDE.........................................................................................................................................................3
1.2 SPECIFICATIONS ...........................................................................................................................................................................3
1.3 NETWORK SIGNAL CONNECTIONS.....................................................................................................................................3
1.4 DISPLAY AND USER INTERFACE............................................................................................................................................4
1.5 ACCESSING THE MODBUS SETTINGS.................................................................................................................................4
1.6 MENU 8 -COMMUNICATION.................................................................................................................................................5
2.0 MODBUS ..................................................................................................................................................... 6
2.1 MODBUS REGISTER TYPES AND DATA FORMS .............................................................................................................6
2.2 MEMORY MAP ...............................................................................................................................................................................6
3.0 NETWORK TROUBLESHOOTING TIPS.......................................................................................................... 9
3.1 TROUBLESHOOTING ...................................................................................................................................................................9
FT-3000 SERIES MODBUS SUPPLEMENT
ONICON Incorporated • 727.447.6140 • www.onicon.com
Page 3
1.1 PURPOSE OF THIS GUIDE
The purpose of this guide is to provide installation and operating instructions for the ONICON FT-3000 Series MODBUS
RTU serial interface.
1.2 SPECIFICATIONS
RS485 (IEA-485)
Transceiver
Data format 1 start bit, 8 data bits and 1 stop bit
Max # of devices per segment 32
Parity Even, None or Odd
Device address range 1 – 255
Baud rate 4800, 9600, 19200, 38400, 57600 and 115200
Termination
Biasing None
1.3 NETWORK SIGNAL CONNECTIONS
MODBUS RTU network signal connections are shown below. To apply end of line termination, set switches 1 and 2 to the
ON position.
SECTION 1.0: INTRODUCTION
25
23 4
1
24 23 22 21 20
19 18 17 16 15 14
13 12 11
24-36 V
SYSTEM
STATUS
SW1
SYSTEM
BATTERY
29 28 27 26
26 - Shield
27 - RS485 Common
28 - A - RS485 (+)
29 - B - RS485 (-)
ON
2
1
28 27 26
29
TERMINATION
SWITCHES
KEYED NOTES
Turn both terminal switches 1 & 2 ON
to activate 120Ω termination resistance
in the RS485 output
RS485 OUTPUT
ON
2
1
1. Refer to FT-3100 Signal Connections
Diagram (ONICON Detail FT-3100.03)
and FT-3100 Installation Operation
Manual for additional information.
1
NOTES
1
Important Note: Please refer to the FT-3000 Series Installation and Operation Manual for additional information.
FT-3000 SERIES MODBUS SUPPLEMENT
ONICON Incorporated • 727.447.6140 • www.onicon.com
Page 4
1.5 ACCESSING THE MODBUS SETTINGS
menus is password protected. The factory default access code is: 4********. The 3-user interface pushbutton functions
change when operating in the program mode. The functions are described below.
ESC
ENTER
key and entering the access code 4*******.
1. From Quick Start menu, push repeatedly until Main Menu is highlighted.
2. Enter into the Main Menu.
3. From the Main Menu repeatedly press until 8-Communication is highlighted and then press enter.
QUICK START
E. P. Detect=
R max=kohm
Pls2=Gal
Tpls2=ms
A1S=Gal/m
ON
0220
1000.0
0500.0
004500
Main Menu
MAIN MENU
3-Scales
4-Measure
5-Alarms
6-Inputs
7-Outputs
8-Communication
COMMUNICATION
Dev. Addr=
Speed=bps
Parity=
Delay=ms
C. timeout=
ice communic. address
001
19200
EVEN
20
2
ESC
ENTER
ON
I
CON
Flow and Energy Measurement
SHORT PUSH LONG PUSH
Briefly press the middle button to advance
to the next menu page.
The ENTER button is used in programming.
2 ALARM(S)
0
+0.00
Gal/m
1.4 DISPLAY AND USER INTERFACE
The FT-3000 Series transmitter is equipped with a lighted graphic display and 3-button user interface as shown below.
FT-3000 SERIES MODBUS SUPPLEMENT
ONICON Incorporated • 727.447.6140 • www.onicon.com
Page 5
Device Address [Dev.Addr = 001]
This is the MODBUS slave address for the FT-3000 Series transmitter. The address range is 001 – 255.
To enter a new value, press enter to access the function. Use the right arrow key to move the cursor and the up arrow key
to change the value. Press enter to accept changes and exit the function. Press escape to exit the program mode.
Baud Rate [Speed = BPS 19200]
This is the Baud rate setting for the FT-3000 Series transmitter. Valid settings are: 1200, 4800, 9600, 19200, 38400, 57600
and 115200.
To enter a new Baud rate, press enter to access the function. Use the up arrow key to change the value. Press enter to
accept changes and exit the function. Press escape to exit the program mode.
Parity Setting [Parity = Even]
This is the parity setting for the FT-3000 Series transmitter. Valid settings are even, none or odd.
To change the parity setting, press enter to access the function. Use the up arrow key to change the setting. Press enter to
accept changes and exit the function. Press escape to exit the program mode.
MODBUS Reply Delay [Delay = MS 20]
This is the MODBUS reply delay interval setting for the FT-3000 Series transmitter. It is entered in milliseconds and the
valid range is 0 – 99 ms.
To enter a new value, press enter to access the function. Use the right arrow key to move the cursor and the up arrow key
to change the value. Press enter to accept changes and exit the function. Press escape to exit the program mode.
MODBUS Timeout Interval [C.Timeout = 2]
This is the MODBUS timeout interval for the FT-3000 Series transmitter. Valid settings are: 1, 2, 3 and 5.
To change the interval, press enter to access the function. Use the up arrow key to change the setting. Press enter to
accept changes and exit the function. Press escape to exit the program mode.
1.6 MENU 8-COMMUNICATION
Device Address [Dev.Addr= 001]
Baud Rate [Speed= bps 19200]
Parity [Parity= EVEN]
MODBUS Reply Delay [Delay=ms 20]
MODBUS Timeout Interval [C.timeout= 2]
FT-3000 SERIES MODBUS SUPPLEMENT
ONICON Incorporated • 727.447.6140 • www.onicon.com
Page 6
units shown on the meter’s display.
2.1 MODBUS REGISTER TYPES AND DATA FORMS
•
• A single coil is provided for resetting totals.
Function Codes Supported
SECTION 2.0 MODBUS
Function Code Description
04 Read multiple input registers
05 Write a single coil
08 Diagnostics
Important Note
Register addresses are shown in Base 1 format. Address 0001 corresponds to memory location 0000.
Rate / Velocity Data
Data transmitted in the same engineering units shown on the transmitter display.
2.2 MEMORY MAP
Function
Code
Address Description Data Format Comment
04 0001
04 0002
04 0003
04 0004
04 0005
04 0006
04 0007 Velocity in ft/s or m/s
04 0008
Caution
Changing the A1S (Full Scale Analog Output) value in the eld will not change the FS1 value reported over
the network.
FT-3000 SERIES MODBUS SUPPLEMENT
ONICON Incorporated • 727.447.6140 • www.onicon.com
Page 7
Totalizer Data
Data transmitted in the same engineering units shown on the transmitter display.
Function
Code
Address Description Data Format Comment
04 0009 Unsigned long integer
04 0010 Unsigned long integer
04 0011 Two 8-bit bytes *See below
04 0012 Unsigned long integer
04 0013 Unsigned long integer
04 0014 Two 8-bit bytes *See below
04 0015 Unsigned long integer
04 0016 Unsigned long integer
04 0017 Two 8-bit bytes *See below
04 0018 Unsigned long integer
04 0019 Unsigned long integer
04 0020 Two 8-bit bytes *See below
T+ total indicated on the display – 123.45
T+ totalizer value with decimal point correction – 12345 x 0.01 = 123.45
2.2 MEMORY MAP (CONTINUED)
FT-3000 SERIES MODBUS SUPPLEMENT
ONICON Incorporated • 727.447.6140 • www.onicon.com
Page 8
Function Code Address Description Data Format Comment
04 0021
Two 8-bit bytes See below for details
04 0022 # of samples used to calculate
Unsigned integer See below for details
04 0023 Equivalent resistance between E1
Unsigned integer
04 0024 Equivalent resistance between E2
Unsigned integer
04 0025 Voltage between E1 and common
in mV
Signed integer
04 0026 Voltage between E2 and common
in mV
Signed integer
04 0027 Voltage measured at recharging
terminals in mV
Unsigned integer
04 0028 Residual battery capacity % Unsigned integer
04 0029 CPU temperature Signed integer
04 0030 Board temperature T1 Signed integer
04 0031 Board temperature T2 Signed integer
04 0032 Signed integer
04 0033 Latest sensor test result code Unsigned integer
04 0034 # of active alarms Unsigned integer
Process Diagnostic Data
Data transmitted in the same engineering units shown on the transmitter display.
Process ag 1 (Least signicant byte) in register 0021
Bit 0: Not used
Process ag 2 (Most signicant byte) in register 0021
Bit 4: Measured signal amplitude out of A/D converter range
Bit 2: Input signal error
Bit 1: Coil excitation error
Bit 0: Empty pipe alarm
2.2 MEMORY MAP (CONTINUED)
FT-3000 SERIES MODBUS SUPPLEMENT
ONICON Incorporated • 727.447.6140 • www.onicon.com
Page 9
Sub-function code Description Comment
00 Return query date
response message should be identical to the request.
01 Restart communications Restart comms following forced listen
04 Force listen mode Activate listen mode
10 Clear diagnostic counters
11 Return bus message count
12 Return bus CRC error count
13 Return exception error count
14 Return slave message count
15 Return slave no response count
16 Return slave NAK count
17 Return slave busy count
18 Return bus character overrun count
Reset All Enabled Totalizers Using Function Code 05
MODBUS Diagnostic Tools Using Function Code 08
Sensor test results reported in register 0032
Bit 14: Resistance of electrode E1 outside limits with respect to reference value
Bit 13: Coil time B outside limits with respect to reference value
Bit 12: Coil time A outside limits with respect to reference value
Bit 11 Coil temperature is outside limits with respect to reference value
Bit 10: Coil leakage current is outside the limit
Bit 9: Coil driver output 2 voltage is out of tolerance during test phase 3
Bit 8: Coil driver output 1 voltage is out of tolerance during test phase 3
Bit 7 Coil driver output 2 voltage is out of tolerance during test phase 2
Bit 6: Coil driver output 1 voltage is out of tolerance during test phase 2
Bit 5: Coil driver output 2 voltage is out of tolerance during test phase 1
Bit 4: Coil driver output 1 voltage is out of tolerance during test phase 1
Bit 3: Coil driver power generator voltage is out of tolerance during test phase 2
Bit 2: Coil driver power generator voltage is out of tolerance during test phase 1
Bit 1: Coil driver generator value is out of tolerance during test phase 2
Bit 0: Coil driver generator value is out of tolerance during test phase 1
2.2 MEMORY MAP (CONTINUED)
Average ow rate calculation for register 0005 (see 0022)
on the measurement sample rate and the MODBUS reading requests.
Example: measurement sample rate = 50 Hz, MODBUS polling frequency = 10 Hz, the number of samples used for
average calculation is 50/10 = 5.
Function Code Address Description Data Format Comment
05 0001 1 = reset Coil
FT-3000 SERIES MODBUS SUPPLEMENT
ON
I
CON
Flow and Energy Measurement
11451 Belcher Road South • Largo, FL 33773 • USA • (P) 727.447.6140 • (F) 727.442.5699 • onicon.com
SECTION 3.0 NETWORK TROUBLESHOOTING TIPS
3.1 TROUBLESHOOTING
REPORTED PROBLEM POSSIBLE SOLUTIONS
Device will not communicate with the
network controller
• A unique address is required for each device on the network.
Duplicate addresses will cause some or all of the devices on the
network to quit working.
• The RS485 network cable connections are polarity sensitive and must
• The Baud rate setting must match the network Baud rate.
• Shield drain connections should be daisy chained in the same
manner as the signal cables for RS485. The shield drain wire should
be left unterminated at the end of the cable and connected to earth
only at the network master controller. Shield wires must not be
connected to the FT-3000 Series.
• The maximum number of devices allowed on a RS485 network
segment without a repeater is 32. Adding more than 32 devices to a
single segment may reduce the transceiver output voltage to a level
that is too low to be distinguished from background noise on the
cable.
• RS485 cable impedance should be matched to a termination resistor
at the end of the cable. This resistor should only be used if the meter
is the last device on the network cable.
Network communications are disrupted
whent he device is connected
• The RS485 network cable connections are polarity sensitive and must
• A unique address is required for each device on the network.
Duplicate addresses will cause some or all of the devices on the
network to quit working.
• Shield drain connections should be daisy chained in the same
manner as the signal cables for RS485. The shield drain wire should
be left unterminated at the end of the cable and connected to earth
only at the network master controller. Shield wires must not be
connected to the FT-3000 Series.
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