I’m running Node-RED on an IX6000 to connect a SQL Server with a Siemens S7-1500 PLC.
However, every 10–15 minutes, Node-RED loses connection to the PLC. (Or Nodered itself freezes? I’m not sure).
I’m using the exact same nodes, software, and PLC in other applications — with a different IoT module running nodered — without any issues.
Has anyone experienced similar problems? Any suggestions or ideas on what could be causing this?
I’ve also reached out to support, but maybe someone here has dealt with this before.
we are also using NR on a SecureEdge Pro to extract data from a PLC and write them into a SQL-database. Up to now we did not encounter such problems. What communication protocol are you using? Which packages/nodes are you using?
Thank you for your reply.
I am using the node “node-red-contrib-s7”. But I had the same problems with the OPC UA node.
Strangely, since a few hours after I made this post it has been “solved”. I’ve only had it 2 times since then, before that I had it 30 times in a few hours …
I think I found the problem.
I am using a S7-1515 for this project with is overkill, I had cycle times of 2-3ms.
I have now changed this to at least 15ms and no longer have the problem (for now).
Must be that it was on a limit before which sometimes made it work