IAI America ROBO Cylinder Series - Manual (Page 73)

5. Modbus RTU
65
Modbus
(5) Query sample
A sample query that queries addresses 9000
H
to 9009
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 00 00 0A E8 CD
Field RTU mode
8-bit data
Start Silent interval
Slave address [H] 01
Function code [H] 03
Start address [H] 9000
Number of registers [H] 000A (10 registers)
Error check [H] E8CD (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 14 00 00 00 00 00 00 00 00 6E 00 60 18 80 00 23 C7 00 00 00 19 18 A6
Field RTU mode
8-bit data
Start Silent interval
Slave address [H] 01
Function code [H] 03
Number of data bytes [H] 14 (20 bytes = 10 registers)
Data 1 [H] 00 00 00 00 (current position monitor)
Data 2 [H] 00 00 (present alarm code query)
Data 3 [H] 00 00 (input port query)
Data 4 [H] 6E 00 (output port query)
Data 5 [H] 60 18 (device status 1 query)
Data 6 [H] 80 00 (device status 2 query)
Data 7 [H] 23 C7 (expansion device status query)
Data 8 [H] 00 00 00 19 (system status query)
Error check [H] 18A6 (in accordance with CRC calculation)
End Silent interval
Note If the response example is simply an example and will vary depending on
various conditions.