Faults and Alarms
05.2006
6SE7087-2JD60 Siemens
AG
14-20
Operating Instructions
SIMOVERT MASTERDRIVES
Number / Alarm
Cause
Counter-measure
A036
Brake checkback
"Brake still closed"
The brake checkback indicates the "Brake still
closed" state.
Check brake checkback (see FD 470)
A037
Brake checkback
"Brake still open"
The brake checkback indicates the "Brake still
open" state.
Check brake checkback (see FD 470)
A041
Vdmax controller inhibit
The line voltage is too high or the drive line
voltage (P071) is incorrectly parameterized.
The Vdmax controller is disabled despite
parameter access (P515), as otherwise the
motor would accelerate immediately in
operation to the maximum frequency.
Check
- the line voltage
- P071 Line Volts
A042
Motor stall/lock
Motor is stalled or blocked.
The alarm cannot be influenced by P805
"PullOut/BlckTime", but by P794 "Deviation
Time"
Check
- whether the drive is locked
- whether the encoder cable is interruped
during speed control and whether the shield is
connected.
- Whether the drive has stalled
- For synchronous motors (P095=12):
excitation current injection
A043
n-act jump
The permissible change value of the speed
encoder signal (P215) has been exceeded.
Additionally for synchronous motors
(P095=12):
The motor rotates with more than 2% of the
rated speed at the time of inverter release.
The inverter status "Ready for operation" is not
exited.
Check the tachometer cables for interruptions.
Check the earthing of the tachometer shield.
- The shield must be connected both on the
motor and on the converter side.
- The encoder cable must not be interrupted.
- The encoder cable must not be laid with the
power cables.
- Only the recommended encoders should be
used.
- If there is a signal fault, use the DTI board if
necessary. If required, change P215.
- Additionally for synchronous motors
(P095=12):
Do not grant inverter release until the motor is
at standstill
A044
I too low
Only for synchronous motors (P095=12) in
operation:
The difference smoothed with P159 between
excitation current setpoint and actual value
(r160 - r156) deviates from zero by more than
25 % of the rated magnetizing current.
Only for synchronous motors P095=12)
Check:
- whether the current limitation of the excitation
current control is too small,
- whether the dynamic performance of the
excitation current injection is too low,
- whether the excitation current injection
function is operating,
- whether the wiring of excitation current
actual-value P155 is correct,
- whether the wiring of excitation current
setpoint r160 is correct,
- whether there is a wire break between
MASTERDRIVES and the excitation device,
- whether the voltage limitation is too low for
dynamic excitation current control,
- whether the analog output for r160 takes
place without isolating amplifiers (despite
cable length > 4 m)
