IAI RoboNet Operation Manual page 141

Response
Field name
Header
Slave address
Function code
Data bytes
Data 1 (upper)
Data 1 (lower)
Data 2 (upper)
Data 2 (lower)
Error check (CRC)
Trailer
Total bytes
Actual Example
Sent Query:
Received Response:
Gateway status signal 0 is "8021H," while status signal 1 is "0003H." In other words, the RUN, W8B1, W4B1, LNK1
and LNK0 signals are ON.
RTU mode data
(8 bits)
None
3F H
03 H
04 H
1 each for upper
Arbitrary
and lower words
Arbitrary
Arbitrary
Arbitrary
Based on
calculation result
None
3F03F7000002F2A1
3F0304802100031C3B
Data length
(bytes)
-
1 Fixed.
1
1 1-word register x 2 = 4 bytes
2
Data of gateway status signal 0, 1
Same as above
2
-
Arbitrary
Part 1 Specification
Remarks
121