Hi. I am using RS485 to USB converter to connect my Omron CP2E-N20DR-A PLC and my computer. I have successfully read the data from data memory of PLC and can see it on my debug window at node-red. Here's the visual representation of my progress.. [image] Data memory of my PLC [image] Data rea…

[image] jagades: but I'm curious on why the data is being split into 2 hexadecimal string where are you seeing 2 hexadecimal strings? I see a Data object with 2 16 bit values and an equivalent buffer containing the byte values. [image] jagades: In my case, I need the data to be display…

The v1 beta of node-red-contrib-omronfins has c mode nodes to assist with reading and writing serial commands. It would be great if you could test these out? [image] Communicate with OMRON PLC using peripheral port? (USB B type) Hardware Hi @Vanj I have added a beta vers…

Communicate with OMRON PLC using peripheral port? (USB B type) npm i node-red-contrib-omron-fins@1.0.0-beta-0 I dont have access to a peripheral / hostlink cable or PLC to test so would be grateful if you could test it and feedback. Ask here if you have questions on usage. Hi, I thought that …

The beta version I have pointed you to contains C Mode nodes that generate the hostlink protocol strings that you pass to a serial request then you pass the response through another C Mode node to parse the data. In essence, they are doing what you did except they simplify the creation of the proto…

[image] Okay, but for all the nodes present under node-red-contrib-omron-fins, IP address is required; in this case, how am I able to get the IP address using RS485?

Did you install the beta as explained in the post I linked to in my first response? [image] Communicate with OMRON PLC using peripheral port? (USB B type) To install... cd ~/.node-red npm i node-red-contrib-omron-fins@1.0.0-beta-0 Did you restart node-red after installing? Did you refresh t…

If you install correctly, you should see new nodes in the palette. Example... [image]

Thanks, found the nodes after installing them through Windows Powershell. Now I would like to know the way to use the function node, to write out the response from the PLC

[image] jagades: Now I would like to know the way to use the function node, to write out the response from the PLC You don't. That was a placeholder to indicate where the serial port node goes. [image] Steve-Mcl: The beta version I have pointed you to contains C Mode nodes that generate …

[image] I have replaced with my COM 11, but the data being read is not correct. Here's my C-mode command setting: [image] Please let me know where I'm making a mistake [image] This is the data memory from the PLC. By right, I should be expecting the data "1122" from address number 25

[image] Hi, just found out that the data is being displayed at the debug window, but I'm curious on why the data is being split into 2 hexadecimal string. In my case, I need the data to be displayed as a whole, (1122). In addition, I need help on how to compile the data as one whole string (1122) …

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Read Omron PLC using node-red-omronplc (serial ; NOT FINS)

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Steve-Mcl 8 February 2023 01:16 2

The v1 beta of node-red-contrib-omronfins has c mode nodes to assist with reading and writing serial commands. It would be great if you could test these out?

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Read Omron PLC using node-red-omronplc (serial ; NOT FINS)

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