Operating instructions

Vector Control Chassis Type Frequency Converter Faults and Alarms
SIEMENS AG 476 869 4070 76 J AB-74
SIMOVERT MASTERDRIVES Operating Instructions 11-3
Fault
number
Fault Counter-measure
F015
Motor stall
Motor has stalled or is locked:
• if the static load is too high
• if the acceleration or deceleration time is
too fast or if load change is too fast and
too great,
• due to incorrect parameterization of the
pulse encoder pulse number P151 or of
the analog tachometer scaling P138.
• due to disturbed speed signals
(tachometer shield not connected)
The fault is only generated after the time set
in P805.
The binector B0156 is set, in the status word
2 r553 Bit28.
To detect whether the drive is locked, see
P792 (Perm Deviation) and P794. With n/f
control, this fault is tripped if the torque limits
have been reached (B0234).
With speed control (P100 = 4) and master
drive (see P587), the fault can also point to
an interruption in the encoder cable. This
case has the same significance as if the drive
is locked.
With v/f control, the I(max) controller has to
be activated (P331). The monitor does not
operate with v/f textile applications (P100 = 2).
Motor has stalled or is locked:
• By reaching the maximum frequency in
the case of synchronous motors
(P095 = 12,13)
As a result of missing or excessively high
excitation current in the case of externally
excited synchronous motors (P095 = 12):
(flux is too small or too great).
When the maximum frequency (including
control reserves) (B0254) has been reached
on synchronous motors, the fault is generated
immediately. If the deviations in the rotor flux
are too great, first of all, the converter current
is switched to zero, the excitation current is
reduced and, after some time, the fault
message is tripped at the level of the double
damping time constant (2*r124.1). During this
wait time, the status word bit is set already
B0156 (r553.28)
• Reduce load
• Release brake
• Increase current limits
• Increase P805 PullOut/BlckTime
• Increase P792 response threshold for
set/actual deviation
Only for f/n/T control (P100 = 3, 4, 5)
• Increase torque limits or torque setpoint
Only n/T control or v/f control with speed
controller: (P100 = 0, 4, 5)
• Check tachometer cable breal
• Check pulse encoder pulse number
• Check analog tachometer scaling
• Connect shield of tachometer cable on
motor side and converter side
• Reduce smoothing of speed pre-control
P216 (only n/T control)
Only frequency control: (P100 = 3)
• Slow down acceleration time (see also
P467-ProtRampGen Gain)
• Increase current in the lower frequency
range (P278, P279, P280)
• Switch in speed controller pre-control
(P471>0)
• Set EMF controller more dynamically
(P315) to max. approx. 2
• Increase changeover frequency for the
EMF model (P313)
• Replace by speed control with pulse
encoder
In the case of overmodulated n/f controller:
• Track speed setpoint with the speed
actual value so that the set/actual
deviation is always less than that set in
P792.
Only for synchronous motor: (P095 = 12)
• Check current limits of the excitation unit.
• Check excitation current setpoint and
actual value (incl. wiring)
• Check voltage limits of the excitation unit
during dynamic current changes.
• Check drive system for resonance
oscillations.