IAI America ROBO Cylinder Series - Manual (Page 120)

5. Modbus RTU
112
Modbus
(4) Query sample
A sample query that reads the expansion system status register (address 9015
H
) of a controller of
axis No. 0 is shown below.
z Query (silent intervals are inserted before and after the query)
01 03 90 15 00 01 B8 CE
Field RTU mode
8-bit data
Start Silent interval
Slave address [H] 01
Function code [H] 03
Start address [H] 9015
Number of registers [H] 0001
Error check [H] B8CE (in accordance with
CRC calculation)
End Silent interval
The response to the query is as follows.
z Response (silent intervals are inserted before and after the response)
01 03 02 01 00 B9 D4
Field RTU mode
8-bit data
Start Silent interval
Slave address [H] 01
Function code [H] 03
Number of data bytes [H] 02 (2 bytes = 1 registers)
Data 1 [H] 01 00
Error check [H] B9D4 (in accordance with CRC calculation)
End Silent interval
Note The data of the response example is simply an example and will vary depending on
various conditions.