Siemens SINUMERIK 840D sl Series Diagnostics Manual page 703

08/2005
Cause: The BICO signal "external fault 2" was triggered.
See also: p2107
Remedy: Eliminate the causes of this fault.
207862 <location>External fault 3
Reaction: OFF2 (DCBRAKE, NONE, OFF1, OFF3, STOP1, STOP2)
Acknowledge: IMMEDIATELY (POWER ON)
Cause: The BICO signal "external fault 3" was triggered.
See also: p2108, p3111, p3112
Remedy: Eliminate the causes of this fault.
207900 <location>Drive: Motor locked
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, p2177
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).
207901 <location>Drive: Motor overspeed
Reaction: OFF2 (NONE, OFF1)
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: For a positive direction of rotation:
- check r1084 and if required, correct p1082, CI: p1085 and p2162.
For a negative direction of rotation:
- check r1087 and if required, correct p1082, CI: p1088 and p2162.
207902 <location>Drive: Motor stalled
Reaction: OFF2 (NONE, OFF1, OFF3, STOP1, STOP2)
Acknowledge: IMMEDIATELY
Cause: Only for vector drives (refer to p0107):
It was detected that the motor was stalled for a time longer than that entered into p2178.
Fault value (r0949, decimal):
1: Stall detection using r1408.11 (refer to p1744)
2: Stall detection using r1408.12 (refer to p1745)
© Siemens AG, 2005. All rights reserved
SINUMERIK 840D sl/840D/840Di/810D Diagnostics Guide (DA), 08/2005 Edition
Overview of Alarms
2-703