Siemens F24 fault code meaning
Siemens / F24
Series: 6RA28
Fault in the measurement channel for the digital speed read from the pulse encoder or the interrupted armature circuit.
DC drive
Meaning: Encoder cable fault or damaged encoder. Possible causes: EMC interference in the pulse encoder signal (terminals 28–30); pulse encoder fault; short circuit in the encoder power supply cable or another encoder cable; channels swapped; negative input of the pulse encoder evaluation circuit not grounded; A1660 electronic board fault.
Possible causes
Source: 6RA28 Chinese Manual P80