Part 1 specification – IAI America REXT User Manual
Page 180
Part 1 Specification
Chapter 3 Gateway R unit
156
Part 1 Specification
[2] Response format
If the data has been changed (written) successfully, the response returned is a copy of the query excluding the
number of bytes and new data.
Field name
RTU mode data
(8 bits)
Data length
(bytes)
Remarks
Header
None
-
Slave address
3F H
1
Fixed.
Function code
10 H
1
Starting address
(upper)
Arbitrary
Starting address
(lower)
Arbitrary
2
The address varies depending on the axis
arrangement.
Number of registers
(upper)
Arbitrary
Number of registers
(lower)
Arbitrary
2
Error check
(CRC)
16 bits
2
Based on calculation result
Trailer
None
-
Total bytes
8
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