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Author Topic: Cannot communicate to OMRON CJ2M  (Read 1458 times)

frenelius

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Cannot communicate to OMRON CJ2M
« on: March 31, 2021, 02:13:49 AM »
Hello,
I am testing HMI to see if I can replace the NB displays, but I cannot get to have full communication with the PLC through OmronEthernetFINSCom.

PLC CJ2M-CPU31

In some cases, I can write to D0, but will not get a valid response back from the PLC. And I have not been able to read D0 never.

Attached the Wireshark capture. PLC address is 10.0.0.1, AHMI is 10.0.0.5.

Do anybody know if it is just a configuration problem?

I have been trying different options (TargetNetworkAddress, TargetNodeAddress, Private, Public...) without luck.

Thanks a lot!
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Archie

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Re: Cannot communicate to OMRON CJ2M
« Reply #1 on: March 31, 2021, 03:39:37 AM »
According to the error code being received 0x0502

 "Relaying is not possible because there are no routing tables"
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frenelius

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Re: Cannot communicate to OMRON CJ2M
« Reply #2 on: March 31, 2021, 03:53:17 AM »
But the error I see in Wireshark is 0x8502, is it the same as 0x0502?

Thanks.
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Archie

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Re: Cannot communicate to OMRON CJ2M
« Reply #3 on: March 31, 2021, 04:19:41 AM »
The 8 indicates a network relay error
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Archie

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Re: Cannot communicate to OMRON CJ2M
« Reply #4 on: March 31, 2021, 04:22:13 AM »
Attached is more specific information
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