Firmware
≤
11.00 - DMS 8.0 EN - 10/2011
L
239
8400 StateLine C | Reference manual
Motor control (MCTRL)
Monitoring
5.12.5
Motor phase failure monitoring
In order to safely detect the failure of a motor phase, a certain motor current must flow for
the current sensor system. Thus, the response set in
C00597
(Lenze setting: "No Reaction")
is caused after a delay time of maximally 2 s after controller enable if a current-carrying
motor phase U, V, W fails or if motor connection is missing. If the current threshold value
set in
C00599
is already exceeded within the delay time, the motor phase failure
monitoring starts from this point in time.
The monitoring mode checks the current flow for each motor phase as a function of the
commutation angle. Monitoring is activated if a commutation angle of approx. 140° is
covered without the current set in
C00599
being exceeded. Monitoring is activated at an
output frequency of 0 Hz if none of the three motor phases reaches the threshold value set
in
C00599
.
If the motor phase failure detection is tripped:
– The response set in
C00597
will take place.
– The error message "
LP1: Motor phase failure
" is entered into the logbook.
– The
bMctrlMotorPhaseFault
status output of the
LS_DeviceMonitor
system block is
set to TRUE.
The motor phase failure detection is inactive if
– a controller inhibit is set,
– connection to a rotating machine is carried out (flying restart circuit or connection to
actual speed value),
– an error is pending due to a DC-bus overvoltage ("
OU
"),
– motor parameter identification is carried out,
– DC-injection braking is active.
Note!
In the Lenze setting (
C00597
= "0: No response"), the motor phase failure
monitoring is not activated!
Note!
If the "1: Fault" error response is set in
C00597
and a motor phase fails, the
bMctrlMotorPhaseFault
status output of the SB
LS_DeviceMonitor
is set to TRUE
for only 1 second, as with pulse inhibit via the error response no motor phase
error can be detected anymore. The logbook and
C00561/3...5
continue to show
the cause of the motor phase failure.
Phone: 800.894.0412 - Fax: 888.723.4773 - Web: www.clrwtr.com - Email: info@clrwtr.com
