ikoth
Hi there,

I have OpenPLC controlling a FactoryIO simulation, with both running on the same PC.
I now need to check status information over the network.

My goal is to get data into NodeRed, using a ModBus Node. I can read the "counter" value from a holding register, with no problem, but I can't see any Coil states. I can replicate this behaviour (value for holding register, but not coils) in other tools:

ModbusREAD.png  Should I be able to read coil status over the network?

Thanks.
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thiagoralves
Wrong coil address. Read https://www.openplcproject.com/reference/modbus-slave/
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ikoth
Thanks. I found all the coils in the "800" range, so can now retrieve the status details.

Much obliged.
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