Monitor Digital Signals
In the diagnostics mode all signals passed to and from the controller internal logic can be monitored. A signal tap is connected in the diagnostics module and the signal states are displayed on the web GUI or the controller GUI.

| A | Controller internal state machine and logic functions | 
| B | Digital output signal path | 
| C | Digital input signal path | 
| D | Diagnostics module | 
| E | User interface | 
| F | Output signal tap | 
| G | Input signal tap |