Skip to Content

Register Login

Industry Online Support

Technical Forum

Navigation

NodeRED crashes when plugging Modbus slave

Created by: OneCo_YB at: 4/21/2022 5:22 PM (3 Replies)

Rating (0)

Thanks 0

4 Entries

4/21/2022 5:22 PM	Rate (0)
OneCo_YB Member Joined: 10/18/2012 Last visit: 11/5/2024 Posts: 4 Rating: (0)	Hi, I'm struggling with 2 identical IoT2040 which both crash NodeRED when connecting a modbus TCP slave. IoT2040 has latest image installed (v3.1.1) containing following software versions: Node-RED version: v1.2.1 Node.js version: v8.17.0 I attached node-red.log to show the behavior when the modbus node tries to connect to Modbus slave. The node-red-contrib-modbus version installed with the image is 5.13.3. I tried to update it to latest (v5.21.2) but it didn't work; the version remains at 5.13.3. My concerns with modbus node v5.13.3 is that it doesn't correspond to the requirements in https://flows.nodered.org/node/node-red-contrib-modbus (ref. attached picture in zip file). Should I install a version of node-red-contrib-modbus corresponding to Node-RED version or to Node.js version? Some help would be much appraciated. Regards, Yoann Attachment Node-red_SiemensSupport.zip (741 Downloads)
	Last edited by: OneCo_YB at: 04/22/2022 08:24:33
Suggestion To thank Quote Answer

4/22/2022 10:38 AM	Rate (0)
bergmanu Platinum Member Joined: 4/28/2015 Last visit: 11/12/2024 Posts: 3345 Rating: (379)	Hi, unfortunately the pre-installed version 5.13.3 of the Modbus nodes it not compatible to the used NodeJS version. See also here. You need to install the node in version 3.6.1. Remove current node version: cd /home/root/.node-red/node_modules rm -r node-red-contrib-modbus Install version 3.6.1 npm install -g node-red-contrib-modbus@3.6.1 --build-from-source --unsafe-perm Restart node-red Best regards!
	Last edited by: bergmanu at: 04/22/2022 10:41:56 Last edited by: bergmanu at: 04/28/2022 10:00:56 Not working for IOT2050 support anymore from March 1st, 2024. I really enjoyed the time supporting you! :)
Suggestion To thank Quote Answer

4/22/2022 12:00 PM	Rate (0)
OneCo_YB Member Joined: 10/18/2012 Last visit: 11/5/2024 Posts: 4 Rating: (0)	Hi, I guess you meant this directory? /home/root/.node-red/node_modules Now appears version 5.21.2 in the palette. I installed this version yesterday. I don't know where to find it in order to remove before installing v3.6.1 Can you remind me the command line to restart nodered only? not the whole iot2000. Moreover, is there a document where I can find all commands to be used with iot2000? Regards, Yoann
	Last edited by: OneCo_YB at: 04/22/2022 12:25:14 Last edited by: OneCo_YB at: 04/22/2022 12:34:22
Suggestion To thank Quote Answer

4/22/2022 12:49 PM	Rate (0)
bergmanu Platinum Member Joined: 4/28/2015 Last visit: 11/12/2024 Posts: 3345 Rating: (379)	Hi, yes I meant node_modules in this directory, sorry. You can remove the folder node-red-contrib-modbus in /home/root/.node-red/node_modules and install version 3.6.1 afterwards. After a reboot 3.6.1 appears in Manage Palette. At least that was the behavior in my case. I recommend to restart the whole IOT2040. Not sure whether there is a command for restarting the node-red service. You could kill it and restart it manually, but then it gets started in another user context. We do not have such a list with all possible commands. Best regards!
	Last edited by: bergmanu at: 04/28/2022 10:00:13 Not working for IOT2050 support anymore from March 1st, 2024. I really enjoyed the time supporting you! :)
Suggestion To thank Quote Answer

|

Share this page:

Share this page on...

Related topics by keywords:

SIMATIC IOT2000 Software

Follow us on