IAI America ROBO Cylinder Series - Manual (Page 242)

6. Modbus
ASCII
234
Modbus
(4) Sample query
A sample query that reads the position complete (address 9014
H
) of a controller of axis No. 0 is
shown below.
Query: 01 03 90 14 00 01 57 [CR] [LF]
Field ASCII mode
fixed character string
Converted ASCII
code data [H]
Start ‘:’ 3A
Slave address [H] ‘0’, ‘1’ 3031
Function code [H] ‘0’, ‘3’ 3033
Start address [H] ‘9’, ‘0’, ‘1’, ‘4’ 39303134
Number of registers [H] ‘0’, ‘0’, ‘0’, ‘1’ 30303031
Error check [H] ‘5’, ‘7’ (in accordance with LRC calculation) 3537
End ‘CR’, ‘LF’ 0D0A
The response to the query is as follows.
Response: 01 03 02 00 00 FA [CR] [LF]
Field ASCII mode
fixed character string
Converted ASCII
code data [H]
Start ‘:’ 3A
Slave address [H] ‘0’, ‘1’ 3031
Function code [H] ‘0’, ‘3’ 3033
Number of data bytes [H] ‘0’, ‘2’ (2 bytes = 1 register) 3032
Data 1 [H] ‘0’, ‘0’, ‘0’, ‘0’ 30303030
Error check [H] ‘F’, ‘A’ (in accordance with LRC calculation) 4641
End ‘CR’, ‘LF’ 0D0A
Note The data of the response example is simply an example and will vary depending on
various conditions