Modbus MFU Option Card Installation Manual
Location
R/W
(Bit)
0
RO
1
RO
2
RO
3
RO
4
RO
5
RO
6
RO
7
RO
Data Accessed with Function Code 08 – Loopback Diagnostic Test
7.6.8
The Loopback Test is used to test communications only. In a correctly working unit the return
message is the same as the query sent. Two codes are supported.
Code
00
Return query data
02
Return diagnostic register
The Diagnostic Register contains the following data.
Location
R/W
(Reg/Bit)
-
0
RO
-
1
RO
-
2
RO
-
3
RO
Data Accessed with Function Code 17 – Report Slave ID
7.6.9
The Slave ID data response includes 30 registers, (60 bytes) of ASCII data to give the device name,
software version and service tag number.
Byte
1 - 23
24 - 28
29 - 60
50 of 64
Data
ESD coil status
Open coil status
Close coil status
Stop coil status
Closed position limit
Open position limit
Monitor relay
Reserved
Memory Status Fault
Auxiliary control input active
Position controller enabled
Highway ESD active
'Null Null Rotork MODBUS MODULE.'
Software version: 'xxx' (where xxx is the revision number)
Tag Name 12 bytes, plus 20 spaces (for IQ3)
Publication PUB091-004-00_0918
Data
Data
Data
Range
0-1
0-1
0-1
0-1
0-1
0-1
0-1
0-1
Range
0-1
0-1
0-1
0-1
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