IAI America ROBO Cylinder Series - Manual (Page 108)

5. Modbus RTU
100
Modbus
(4) Query sample
A sample query that read the current ampere monitor (from address 900C
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 0C 00 02 29 08
Field RTU mode
8-bit data
Start Silent interval
Slave address [H] 01
Function code [H] 03
Start address [H] 900C
Number of registers [H] 0002
Error check [H] 2908 (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 04 00 00 01 C8 FA 35
Field RTU mode
8-bit data
Start Silent interval
Slave address [H] 01
Function code [H] 03
Number of data bytes [H] 04 (4 bytes = 2 registers)
Data 1 [H] 00 00 01 C8
Error check [H] FA35 (in accordance with CRC calculation)
End Silent interval
The current ampere value is “000001C8” o Convert into decimal number o 456
The current ampere monitor value is 456mA.
Note The data of the response example is simply an example and will vary depending on
various conditions.