Siemens SINUMERIK 840D sl Series Diagnostics Manual page 691

08/2005
Remedy: - check the line supply voltage.
- check the infeed module
- reduce the lower DC link threshold (p1248).
- switch-out (disable) the DC link voltage monitoring (p1240 = 0).
207404 <location>Drive: Upper DC link voltage threshold reached
Reaction: OFF2 (NONE, OFF1, OFF3)
Acknowledge: IMMEDIATELY
Cause: The DC link voltage monitoring is active (p1240 = 1, 3) and the upper DC link voltage
threshold (p1244) was reached in the "Operation" state.
Remedy: - check the line supply voltage.
- check the infeed module or the braking module.
- increase the upper DC link voltage threshold (p1244).
- switch-out (disable) the DC link voltage monitoring (p1240 = 0).
207410 <location>Drive: Current controller output limited
Reaction: OFF2 (NONE, OFF1)
Acknowledge: IMMEDIATELY
Cause: The condition "I_act = 0 and Uq_set_1 longer than 16 ms at its limit" is present and can be
caused by the following:
- motor not connected or motor contactor open.
- no DC link voltage present.
- motor module defective.
- the "flying restart" function is not activated.
Remedy: - connect the motor or check the motor contactor.
- check the DC link voltage (r0070).
- check the motor module.
- activate the "flying restart" function (p1200).
207411 <location>Drive: Flux controller output limited
Reaction: OFF2 (NONE, OFF1)
Acknowledge: IMMEDIATELY
Cause: The specified flux setpoint cannot be reached although 90% of the maximum current has
been specified.
- incorrect motor data.
- motor data and motor configuration (star/delta) do not match.
- the current limit has been set too low for the motor.
- induction motor with sensorless operation in I2t limiting.
- the motor module is too small.
Remedy: - correct the motor data.
- check the motor configuration.
- correct the current limits (p0640, p0323).
- reduce the induction motor load.
- if required, use a larger motor module.
207412 <location>Drive: Commutation angle incorrect (motor model)
Reaction: ENCODER (NONE, OFF2)
Acknowledge: IMMEDIATELY
© Siemens AG, 2005. All rights reserved
SINUMERIK 840D sl/840D/840Di/810D Diagnostics Guide (DA), 08/2005 Edition
Overview of Alarms
2-691