IAI America ROBO Cylinder Series - Manual (Page 135)

5. Modbus RTU
127
Modbus
(4) Query sample
A query example that executes home return operation of a controller of axis No. 0 is shown here.
Query (silent intervals are inserted before and after the query)
First time 01 05 04 0B 00 00 BD 38 --- Set normal status
Second time 01 05 04 0B FF 00 FC C8 --- Execute home return
Field RTU mode
8-bit data
Start Silent interval
Slave address [H] 01
Function code [H] 05
Start address [H] 040B
Changed data [H] First time: 0000
Second time: FF00
(Send data twice to set the rising edge.)
Error check [H] First time: 3CCB
(in accordance with CRC calculation)
Second time: 7D3B
(in accordance with CRC calculation)
End Silent interval
If the change is successful, the response message will be the same as the query.