Fault 51 Analog processing

Subfault: 51.1

Description: Current at analog current input too small

 

Response: Analog input – 4 mA limit undershot

Cause

Measure

Input current at analog input below 4 mA.

– Check the wiring.

– Check the parameterization of the analog input.

Subfault: 51.2

Description: Voltage/current changeover faulty

 

Response: Output stage inhibit

Cause

Measure

The hardware configuration for switching between voltage input and current input on the basic unit does not match the parameterization of the analog input.

– Check the position of the switch for the current/voltage configuration

or

– Check the parameterization of the analog input.