IAI America ROBO Cylinder Series - Manual (Page 222)

6. Modbus
ASCII
214
Modbus
(4) Sample query
A sample query that reads the device status (address 9005
H
) in a controller of axis No. 0 is shown
below.
Query: 01 03 90 05 00 01 66 [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’, ‘0’, ‘5’ 39303035
Number of registers [H] ‘0’, ‘0’, ‘0’, ‘1’ 30303031
Error check [H] ‘6’, ‘6’ (in accordance with LRC calculation) 3636
End ‘CR’, ‘LF’ 0D0A
The response to the query is as follows.
Response: 01 03 02 30 88 42 [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] ‘3’, ‘0’, ‘8’, ‘8’ 33303838
Error check [H] ‘4’, ‘2’ (in accordance with LRC calculation) 3432
End ‘CR’, ‘LF’ 0D0A
Note The data of the response example is simply an example and will vary depending on
various conditions.