LOGO/S7-200 - Write value to Digital Output (Q...) about node-red-contrib-s7 HOT 3 CLOSED

@gfcittolin you are correct, thank you!

Solution is to have nothing connected to the output in the LOGO software. Best to completely remove it from the diagram. However it does not appear to work the same way for inputs sadly. If no input is present in the diagram it is not triggered physically (I'm testing with a pushbutton). Not connecting the input to anything in the diagram also gives an error when uploading the program to the LOGO controller. Solution I found there is to connect the input to a flag.

Regards

from node-red-contrib-s7.

Hi,

I think there shouldn't be any problem writing to outputs like this. Although I've never tested it on a Logo, this works normally on a 315 and on a 1212 I have here.
Just note that there must be nothing else writing on the outputs on the logic. If you're trying to set and output that the PLC logic is also writing to, the PLC will "overwrite" it. Maybe this is the case?

from node-red-contrib-s7.

Just saw your edit. I've never put the hands on a Logo, so I can't help much on that.
That said, there's some useful info on the Snap7 project about connecting to a Logo (http://snap7.sourceforge.net/logo.html). We use the same protocol here, so the instructions should be roughly the same

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