List of faults and alarms
Faults and Alarms
3-1575
© Siemens AG 2007 All Rights Reserved
SINAMICS S List Manual (LH1), 07/2007
F07862 (A)
External fault 3
Drive object:
All objects
Reaction:
A_INFEED: OFF2 (NONE, OFF1)
SERVO: OFF2 (IASC / DCBRAKE, NONE, OFF1, OFF3, STOP1, STOP2)
VECTOR: OFF2 (IASC / DCBRAKE, NONE, OFF1, OFF3, STOP1, STOP2)
Acknowledge:
IMMEDIATELY (POWER ON)
Cause:
The BICO signal "external fault 3" was triggered.
See also: p2108 (External fault 3), p3111 (External fault 3, enable), p3112 (External fault 3 enable negated)
Remedy:
Eliminate the causes of this fault.
Reaction upon A:
NONE
Acknowl. upon A:
NONE
F07890
Internal voltage protection / internal armature short-circuit with Safe Torque Off active
Drive object:
SERVO, VECTOR
Reaction:
OFF2
Acknowledge:
IMMEDIATELY
Cause:
The internal armature short-circuit (p1231=4) is not possible as Safe Torque Off is enabled. The pulses cannot be
enabled.
Remedy:
Switch-out the internal armature short-circuit (p1231=0) or de-activate Safe Torque Off (p9501 = p9561 = 0).
F07900 (N, A)
Drive: Motor locked/speed controller at its limit
Drive object:
SERVO
Reaction:
OFF2 (NONE, OFF1, OFF3, STOP1, STOP2)
Acknowledge:
IMMEDIATELY
Cause:
Motor has been operating at the torque limit longer than the time specified in p2177 and below the speed threshold
set in p2175.
This signal can also be initiated if the speed actual value is oscillating and the speed controller output repeatedly
goes to its limit.
See also: p2175 (Motor locked speed threshold), p2177 (Motor locked delay time)
Remedy:
- check that the motor can freely rotate.
- check the torque limit: For a positive direction of rotation r1538, for a negative direction of rotation r1539.
- check the parameter, message "Motor locked" and if required, correct (p2175, p2177).
- check the inversion of the actual value (p0410).
- check the motor encoder connection.
- check the encoder pulse number (p0408).
- for SERVO with sensorless operation and motors with low power ratings (< 300 W), increase the pulse frequency
(p1800).
- after de-selecting basic positioning, check the torque limits when motoring (p1528) and when regenerating (p1529).
Reaction upon N:
NONE
Acknowl. upon N:
NONE
Reaction upon A:
NONE
Acknowl. upon A:
NONE
F07900 (N, A)
Drive: Motor locked/speed controller at its limit
Drive object:
VECTOR
Reaction:
OFF2 (NONE, OFF1, OFF3, STOP1, STOP2)
Acknowledge:
IMMEDIATELY
Cause:
Motor has been operating at the torque limit longer than the time specified in p2177 and below the speed threshold
set in p2175.
This signal can also be initiated if the speed actual value is oscillating and the speed controller output repeatedly
goes to its limit.
If the simulation mode is enabled (p1272 = 1) and the closed-loop control with speed encoder activated (p1300 =
21), then the inhibit signal is generated if the encoder signal is not received from a motor that is driven with the torque
setpoint of the closed-loop control.
See also: p2175 (Motor locked speed threshold), p2177 (Motor locked delay time)