Omron E5AR - MANUAL 2

7.5 Reading the variable area
7-11
Communication
(Modbus)
Response codes
◆ Reading non-display data
Setting data can be read even if it is set to non-display or is not displayed due to the model.
Command response example
Reading the PV of channel 1
(Client address: H'01)
PV of channel 1 (set as read-only data))
Address : H'0404
Data read : H'000003E8 (100.0°C)
Function
code
Error
code
Error name Cause
H'83
H'02 Variable address error Error in leading address of read.
H'03
Variable data error The number of elements exceeds the speci-
fied range.
H'04
Operation error Unit error, unit change, display unit error, EEP
error (does not occur when number of ele-
ments is 0).
H'03 − Normal end No error.
Command:
Response:
01
01
03
03
0404
04
00 02
00 00 03 E8
(CRC-16)
(CRC-16)