Omron E5CN-H Communications Manual

5-1
SECTION 5
Modbus Communications
Procedure
Read this section if you are to communicate using the Modbus format.
5.1 Data Format.................................................................. 5-2
Command Frame................................................... 5-2
CRC-16 Calculation Example...................5-3
Response Frame ................................................... 5-4
Normal Response Frame ......................... 5-4
Error Response Frame............................. 5-4
Error Codes ...........................................................5-5
No Response............................................5-5
5.2 Function List .................................................................5-6
5.3 Variable Area ................................................................ 5-7
Addresses ................................................5-7
Number of Elements.................................5-8
Set Values................................................5-8
5.4 Detailed Description of the Services............................. 5-9
Variable Read, Multiple .........................................5-9
Variable Write, Multiple........................................5-11
Variable Write, Single/Operation Command........5-14
Echoback Test.....................................................5-21

Omron E5CN-H Specifications

General

Brand	Omron
Model	E5CN-H
Category	Controller
Language	English