Internal Voltage Protection/Armature Short-Circuit With Sto Active; Drive: Motor Locked/Speed Controller At Its Limit; Drive: Motor Overspeed - Siemens Sinamics S120 Diagnostic Manual

SINAMICS alarms
207890 <location>Internal voltage protection / internal armature short-circuit with STO active
Message value: -
Drive object: SERVO_COMBI, SERVO_SINUMERIK828
Reaction: OFF2
Acknowledge: IMMEDIATELY
Cause: The internal armature short-circuit (p1231 = 4) is not possible as Safe Torque Off (STO) 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).
Note:
STO: Safe Torque Off / SH: Safe standstill
207900 <location>Drive: Motor locked/speed controller at its limit
Message value: -
Drive object: SERVO_COMBI, SERVO_SINUMERIK828
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 rotate freely.
- 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 encoderless operation and motors with low power ratings (< 300 W), increase the pulse frequency
(p1800).
- after de-selecting the "Basic positioner" (EPOS) function mode, check the motoring (p1528) and regenerative
(p1529) torque limit and modify again.
207901 <location>Drive: Motor overspeed
Message value: -
Drive object: SERVO_COMBI, SERVO_SINUMERIK828
Reaction: OFF2 (IASC/DCBRAKE)
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.
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Diagnostics Manual, 07/2010, 6FC5398-8BP40-0BA0
Alarms