Siemens F31131 fault code meaning

Series: G120D

Encoder 1: Incremental/absolute position offset too large

converter

Meaning: Absolute encoder: During cyclic reading of the absolute position, the difference between the absolute position and the incremental position was found to be too large. The absolute position read was rejected. Deviation limits: - EnDat encoder: Specified by the encoder, with a minimum of 2 quadrants (e.g., EQI1325>2 quadrants, EQN1325>50 quadrants). - Other encoders: 15 lines = 60 quadrants. Incremental encoder: A deviation from the incremental position was detected when crossing a zero pulse. Equidistant zero pulses: - The first zero pulse crossed establishes the reference point for all subsequent checks. Subsequent zero pulses are spaced at n times the distance relative to the first zero pulse. Equidistant zero pulses: - The first pair of zero pulses establishes the reference point for all subsequent checks. The distance between subsequent pairs of zero pulses must match the expected distance between the first pair of zero pulses.

Possible causes

Source: SINAMICS G120D Control Unit CU240D- 2_CU250D- 2 P942

Series: V90

Encoder 1: Incremental/absolute position offset too large

servo drive

Meaning: During cyclic reading of the absolute position, the absolute encoder detected that the difference between the absolute position and the incremental position was too large. The absolute position read was rejected. Deviation limit: 15 pulses (60 quadrants). When the incremental encoder crossed a zero pulse, a deviation from the incremental position was detected. The first zero pulse crossed defines the reference point for all subsequent checks. Subsequent zero pulses are spaced at n times the distance relative to the first zero pulse. The deviation is expressed in quadrants (1 pulses = 4 quadrants). Check the plug connection.

Possible causes

Source: SINAMICS V90 PROFINET, SIMOTICS S-1FL6 Operating Instructions P386