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st-one-io / node-red-contrib-s7

A Node-RED node to interact with Siemens S7 PLCs
GNU General Public License v3.0
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No response from PLC with S7-1500 #27

Closed ghost closed 5 years ago

ghost commented 6 years ago

Hello

Problem I have the problem that the node won't communicate with my PLC. It was working great on the S7-300 but on the S7-1500 I'm only getting the following error:

"No response from PLC, restarting communication"

The connection is working but it can't communicate with the PLC → No output or variables change.

Hardware/Software

Thank you for your help!

gfcittolin commented 6 years ago

Hi,

Please note that there are some differences between S7-300 and S7-1500. First, the Rack/Slot configuration differs between them. For S7-300 we have the default 0/2, and for S7-1500 we have 0/1 or 0/0.

Besides that, the 1200 and 1500 families may require some extra configuration on the PLC side, regarding access protection and DB optimization. Please check these S7-1200/1500 Notes for how to set them.