Operation Without Mains Supply - Lenze 8400 StateLine C Reference Manual

8400 StateLine C | Reference manual
Diagnostics & error management

Operation without mains supply

Maloperation
An asynchronous
motor with feedback
rotates without
control and with too
low speed
Motor phase (LP1)
monitoring does not
respond if the motor
phases are
interrupted
9.8 Operation without mains supply
The following display parameters have a value of "0" if the mains supply is switched off and
the external 24 V supply of the controller is switched on:
Parameter
C00050
C00051
C00052
C00053
C00054
C00058
C00061
C00064/1...3
C00066
C00177
C00725
400
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Cause
Motor phases have been interchanged
• Thus the rotating field of the motor is not
identical anymore with the rotating field
of the feedback system.
• Therefore, the drive shows the following
behaviour if V/f characteristic control
(C00006 = 7) is performed:
– The motor rotates faster than the speed
setpoint by the value set in C00074.
– After the controller has been enabled,
the controller will not stop if the speed
setpoint = 0 or a quick stop (QSP) occurs.
– Among other things, the final motor
current depends on the value set for the
V boost and may rise up to I
min
can trigger the "OC5: Ixt overload" fault
message.
Monitoring is not active (C00597
Info
MCTRL: Speed setpoint
MCTRL: Actual speed value
Motor voltage
DC-bus voltage
Motor current
Output frequency
Heatsink temperature
Device utilisation (Ixt)
Thermal motor load (I²xt)
Switching cycles
Current switching frequency
L
Remedy
Check the phase position of the motor cable
If possible: Operate the motor with
deactivated feedback
direction of rotation of the motor
which
max
= 0) Activate monitoring
Firmware ≤ 11.00 - DMS 8.0 EN - 10/2011
(C00006 = 6) and check
(C00597 = 1)