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) …

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

Industrial

jagades 8 February 2023 07:16 3

Hi, I thought that Omron Fins is only applicable for those connected using ethernet. But I have connected through RS485. Will the Fins protocol work for me also? I'm asking also because Fins connection node requires IP address, which can be found only using ethernet, as far as I know...

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

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