Siemens A7477 fault code meaning
Siemens / A7477
Series: V90
EPOS: Target position < negative software limit switch
servo drive
Meaning: Message category: Parameter setting/configuration/commissioning error (18). During the current traversing operation, the target position is below the negative software limit switch position. Correct the target position. See: p2580 (EPOS Negative software limit switch), p2582 (Activate EPOS software limit switches).
Possible causes
Source: SINAMICS V90 PROFINET, SIMOTICS S-1FL6 Operating Instructions P393