IAI America ROBO Cylinder Series - Manual (Page 232)

6. Modbus
ASCII
224
Modbus
(4) Sample query
A sample query that reads the current ampere value (address 900C
H
) of a controller of axis No. 0 is
shown below.
Query: 01 03 90 0C 00 02 5E [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’, ‘C’ 39303043
Number of registers [H] ‘0’, ‘0’, ‘0’, ‘2’ 30303032
Error check [H] ‘5’, ‘E’ (In accordance with LRC calculation) 3545
End ‘CR’, ‘LF’ 0D0A
The response to the query is as follows.
Response: 01 03 04 00 00 01 C8 2F [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’, ‘4’ (4 bytes = 2 registers) 3034
Data 1 [H] ‘0’, ‘0’, ‘0’, ‘0’ 30303030
Data 2 [H] ‘0’, ‘1’, ‘C’, ‘8’ 30314338
Error check [H] ‘2’, ‘F’ (In accordance with LRC calculation) 3246
End ‘CR’, ‘LF’ 0D0A
The current ampere value is “000001C8” o Convert into decimal number o 456 (mA)
The current ampere monitor value is 456 mA.
Note The data of the response example is simply an example and will vary depending on
various conditions.