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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:

0404

00 02

00 00 03 E8

(CRC-16)

Omron E5AR - MANUAL 2 User Manual

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