Siemens F31118 fault code meaning

Series: G120-CU250S-2, G120D

Encoder 1: Speed difference exceeded tolerance

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Meaning: When using a HTL/TTL encoder, the speed difference between sampling cycles exceeded the value in p0492. Changes in the measured actual speed are monitored within the current loop sampling period. When encoder 1 is used as the motor encoder, operation can switch to encoderless operation if a fault occurs.

Possible causes

Source: SINAMICS G120, Control Unit CU250S-2 P1047; SINAMICS G120D Control Unit CU240D- 2_CU250D- 2 P942

Series: G130-G150

Encoder 1: Speed difference outside the tolerance

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Meaning:

Possible causes

Source: G150 P931

Series: G220

Motor encoder: Implausible speed change

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Meaning:

Possible causes

Source: SINAMICS G220 converter P1486