Pre-Alarm Information - Toshiba TOSVERT VF-AS3 Instruction Manual

Alarm
English
display
MOFF Undervoltage alarm The input voltage (power circuit) declined.
PrA Terminal STO OFF
t Communication
alarm
(RS485, option)
tUn1 Brake learning error 1) The load is heavy.
tUn3 Light-load high-
speed learning error

■ Pre-alarm information

Pre-alarm
English
display
C Overcurrent pre-
alarm
H Overheat pre-alarm
L Motor overload pre-
alarm
P Overvoltage pre-
alarm
Detection factor
Terminal [STO] is OFF.
Condition very close to the communication
time out trip.
2) Parameter setting is improper.
3) Braking operation is abnormal.
Setting of the motor parameter is improper.
Detection factor
Condition close to the overcurrent trip.
Condition close to the overheat trip.
Condition close to the overload trip.
Condition close to the overvoltage trip.
13-9
E6582062
Measures
Check the input voltage. If no problem is
found, internal error may be the issue. Con-
tact your Toshiba distributor.
Short circuit [STOA] - [STOB] - [PLC]. (By
default, short circuit is done with a shorting
bar).
Perform the same measures with
communication time out "Err5" and "Err8".
1) Perform learning with no load or light load
in approx. 3 % or less rating.
2) Set the motor parameters and learning
related parameters in advance.
3) Check the brake.
Set the motor parameters according to the
motor.
Measures
Perform the same measures with overcurrent
"OC1", "OC2", and "OC3".
Perform the same measures with overheat
"OH".
Perform the same measures with overload
"OL1", "OL2", and "OL3".
Perform the same measures with overvoltage
"OP1", "OP2", and "OP3".
13. Trip information and measures
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