I am setting up a new system and have an s7 1214 plc with an sm1231 4x AI (6ES71231-4HD32-0XB0). It is configured for 0-10v and has no faults in diagnostics but the value always reads 0.
We are using another PLC analog output to test the AI so we know what is coming out and can measure it on the AI terminals. We have replaced the module with a spare and we have the same behaviour on that too.
Weirdly if we move the input to the AI on the cpu it reads as expected so this proves the test PLC output side of things. I've also tried several HW downloads with no effect.
One thing I've just thought of as I'm typing is to delete the module and re-add to the project to see if that helps.
Other than that does anyone have any ideas or spot the obvious mistake I'm missing?
TIA (Thanks in Advance!)
We are using another PLC analog output to test the AI so we know what is coming out and can measure it on the AI terminals. We have replaced the module with a spare and we have the same behaviour on that too.
Weirdly if we move the input to the AI on the cpu it reads as expected so this proves the test PLC output side of things. I've also tried several HW downloads with no effect.
One thing I've just thought of as I'm typing is to delete the module and re-add to the project to see if that helps.
Other than that does anyone have any ideas or spot the obvious mistake I'm missing?
TIA (Thanks in Advance!)