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Warnings, faults and system messages
9.6 List of fault codes and alarm codes
Acknowledge:
IMMEDIATELY
Cause:
Motor has been operating at the torque limit longer than the time specified in p2177 and below the speed threshold in
p2175.
This signal can also be triggered if the speed is oscillating and the speed controller output repeatedly goes to its limit.
It may also be the case that thermal monitoring of the power unit reduces the current limit (see p0290), thereby causing
the motor to decelerate.
See also: p2175 (Motor blocked speed threshold), p2177 (Motor blocked delay time)
Remedy:
- check that the motor can freely move.
- check the effective torque limit (r1538, r1539).
- check the parameter, message "Motor blocked" and if required, correct (p2175, p2177).
- check the direction of rotation enable signals for a flying restart of the motor (p1110, p1111).
- for U/f control: check the current limits and acceleration times (p0640, p1120).
F07901
Drive: Motor overspeed
Reaction:
OFF2 (IASC/DCBRK)
Acknowledge:
IMMEDIATELY
Cause:
The maximum permissible speed was either positively or negatively exceeded.
The maximum permissible positive speed is formed as follows: Minimum (p1082, CI: p1085) + p2162
The maximum permissible negative speed is formed as follows: Maximum (-p1082, CI: 1088) - p2162
Remedy:
The following applies for a positive direction of rotation:
- check r1084 and if required, correct p1082, CI:p1085 and p2162.
The following applies for a negative direction of rotation:
- check r1087 and if required, correct p1082, CI:p1088 and p2162.
Activate precontrol of the speed limiting controller (p1401.7 = 1).
Increase the hysteresis for the overspeed signal p2162. This upper limit is dependent upon the maximum motor speed
p0322 and the maximum speed p1082 of the setpoint channel.
F07902 (N, A) Drive: Motor stalled
Reaction:
OFF2 (IASC/DCBRK, NONE, OFF1, OFF3, STOP2)
Acknowledge:
IMMEDIATELY
Cause:
The system has identified that the motor has stalled for a time longer than is set in p2178.
Fault value (r0949, interpret decimal):
1: Reserved.
2: Stall detection using r1408.12 (p1745) or via (r0084 ... r0083).
See also: p2178 (Motor stalled delay time)
Remedy:
Steps should always be taken to ensure that both motor data identification and the rotating measurement were carried out
(see p1900, r3925).
- check whether the drive stalls solely due to the load in controlled mode or when the speed setpoint is still zero. If yes, then
increase the current setpoint using p1610.
- if the motor excitation time (p0346) was significantly reduced and the drive stalls when it is switched on and run
immediately, p0346 should be increased again.
- check whether a line phase failure is affecting power unit PM230, PM250, PM260.
- check whether the motor cables are disconnected (see A07929).
If there is no fault, then the fault tolerance (p1745) or the delay time (p2178) can be increased.
- check the current limits (p0640, r0067, r0289). If the current limits are too low, then the drive cannot be magnetized.
- if the fault occurs with fault value 2 when the motor accelerates very quickly to the field weakening range, the deviation
between the flux setpoint and flux actual value can be reduced and, in turn, the message prevented, by reducing p1596
or p1553.
A07903
Drive: Motor speed deviation
Reaction:
NONE
Acknowledge:
NONE
794
Operating Instructions, 03/2019, FW V1.0, A5E44751205B AB
SINAMICS G120XA converter
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