Read/Write data from Omron (NJ501-1400) PLC into node-red

#1

Hi,

I need to connect Omron (NJ501-1400) PLC with the node-red. Is there some node (like node-red-contrib-s7 for Siemens PLC) to communicate with the Omron PLC ? What could be the most suitable way to establish connection?

Thanks in advance!

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#2

Try using the forum search ( the magnifying glass) for the word "Omron"

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#3

Depending on the firmware level and version of NJ, you may well have OPCUA built in.

If so, I'd recommend using the IIOT nodes.

If not, then there isn't a great deal of FINS or EtherNet/IP type nodes I'm afraid.

You could always use write some ladder with socket services in the PLC and use the TCP nodes as a last option.

2 other options...
1.
There are some MQTT function blocks available for the NJ / NX PLCs. I've used them and they work.

The NJ PLC is a mighty fast PLC and it would be capable of running logic to implement MODBUS TCP. There may be some

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#4

Some links...

Modbus...
https://www.myomron.com/index.php?action=kb&article=1245

MQTT...
take a look at this project. It has MQTT Client connect, pub and sub FBs in a library.

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#5

Thanks you very much for the detailed answer. I will see and try different options!

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