Hi guys,

Forgot to follow up. The problem was a bad air pressure sensor. Changed the sensor and everything worked as normal again.

 

Hi guys,

The problem was a bad air pressure sensor.

Great. That was my next guess

Did you get any documentation?
Max.

 

Yay, we like happy endings and per Max I would make sure for the future you have documentation.

Ron

 

Yes we received some documentation from the factory showing the components on the input and output cards of the PLC with their addresses.
Also a diagram of the complete system. Many thanks guys..