FT-13 Technical Manual, Rev. 1.40 March 2013
Page 46 of 56
A
PPENDIX
3:
M
ODBUS
RTU
D
ATA
S
TRUCTURE
If the instrument is programmed for Modbus, it can be used as a Modbus RTU slave on a RS485
communication line or on the Ethernet communication line. The Modbus slave adress is defined in the
parameter [Address]. Function code “0x03” and function code “0x10” are supported.
Read
command
Modbus
register
Function
code
Register
address
No. of
registers
Definition
Display value
40 001
03
00,00
00,02
Current display value; Gross or Net
Status
40 003
03
00,02
00,01
Bit0
Busy
1
– System Busy
Bit1
Data ok
1
– Data ok // 0 – Error
Bit2
Motion
1
– Weight is not stable
Bit3
Net Mode
1
– Net mode
Bit4…12
0
Bit13…15
Transfer
binary
(Bit13 to
Bit15) to
decimal and
compare to
error code
0
No Errors
1
ADC out of range
2
ADC overrange
3
ADC underrange
4
System fault
5
FT not in weighing or filling
mode
Tare weight
40 004
03
00,03
00,02
Current tare weight
Gross Weight
40 006
03
00,05
00,02
Current gross weight
Operation Mode
40 010
03
00,09
00,01
1 = Filling mode, 0 = Weighing mode
Target
40 011
03
00,0A
00,02
Current target weight
Tolerance
40 013
03
00,0C
00,02
Current tolerance weight
Coarse
40 015
03
00,0E
00,02
Current coarse value
Fine
40 017
03
00,10
00,02
Current fine value
CN
40 019
03
00,12
00,01
Current consecutive Number
Last filling value
40 020
03
00,13
00,02
Last filling weight
Quantity
40 022
03
00,15
00,01
Current quantity
Total
40 023
03
00,16
00,02
Current total weight
Inputs
40 025
03
00,18
00,01
Current input status
Outputs
40 026
03
00,19
00,02
Current output status:
Active output no. = Data bit no. se
t to “1”
(e.g. only Bit 1 + Bit 8 = “1”
only output 1 + 8 active)
Middle
40 028
03
00,1A
00,02
Current middle value
Calibration
Status
40 033
03
00,1F
00,01
D0…D7
Calibration
Process
Status
1
Ready for calibration
3
Zero calibration in process
4
Span calibration in process
9
Error (Refer to D8 ... D15 )
D8…D15
Calibration
Errors
1
Calibration Timeout
–
Restart calibration
2
ADC Error
– Re-energize the instrument
– If seen again, change board.
3
Instrument cannot be calibrated
–
Check load cell cable
– Re-energize the instrument
34
Instrument cannot be calibrated
– Load
cell signal is too low or too high
35
Calibration Error
– Calibration test weight is too small,
increase calibration weight value
(40031-32)
– Check load cell connections
37
Scale unstable
– Wait until scale becomes stable
– Check grounding wiring
38
Calibration Jumper is not installed-
Check Calibration jumper
