CODESYS - the IEC 61131-3 automation software
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Questions about EtherNet / IP connection
https://forum.codesys.com/viewtopic.php?f=21&t=9641
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Author:  Tatsuya [ Fri Mar 29, 2019 1:57 am ]
Post subject:  Questions about EtherNet / IP connection

Dear all.

I am trying to connect RaspberryPi(installed CODESYS 3) to PLC using EtherNet / IP.
In this system, PLC is a scanner and RaspberryPI is an adapter.

I was able to connect PLC and RaspberryPi by Forward_Open command.
However, I could not get RaspberryPi's data using ExplicitMessage, and I got an error response.
(General Status code : 0x14 => "Attribute not supported")
When I checked the command output from the PLC, "Logical Format" was "16-bit logical value".

I want to connect PLC to RaspberryPi with "16-bit logical value". Do I need to make any configuration changes?


When I conducted a communication test using two RaspberryPi (one scanner + one adapter), data was successfully acquired."Logical Format" was "8-bit logical value" when communication was successful.

Could you help me this problem ?
Thank you.

【Explicit Message data】
    - Service Code : 0x0E (Get_Attribute_Single)
    - Class ID : 16#01 (Identity Object)
    - Instance ID : 16#01
    - Attribute ID : 16#05 (Status)

【CODESYS Information】
    - Raspberry Pi : Target Version 3.5.14.10
    - Ethernet device : Version: 3.5.14.0
    - EtherNet/IP Adapter : Version: 3.5.14.10

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