Emergency Stop - Toshiba TOSVERT VF-PS1 Instruction Manual

Be sure to select this setting if the main power supply is turned on and off endlessly for reasons of sequence, as
shown below, in the event the control power supply backup device fails or not connected.
<Example of a situation in which the main power supply is turned on and off endlessly>
In the example of connection shown above, if the control power supply backup device (optional) fails or not
connected and becomes incapable of supplying control power, control power is supplied from the inverter's main
circuit and operation is continued without interruption. If the inverter is tripped under these circumstances because of
a ground fault or overcurrent :
(1) The FL relay is triggered and the main power supply is shut off by the MC.
(2) As a result of shutoff by the MC, the voltage in the inverter's main circuit and control circuit drop.
6
(3) As a result of a drop in control voltage, the FL relay recovers from a trip.
(4) The release of the FL relay turns the MC back on.
(5) Operation is restarted and if the problem causing the inverter to be tripped is not eliminated, the inverter is tripped
again, the situation in (1) arises again, and thus the above cycle of operation is repeated endlessly.

6.26.3 Emergency stop

• Function
Emergency stop mode can be selected. At emergency stop, a trip message (" ") is displayed. FL relay can
be deactivated using the output function selection.
1) Emergency stop by terminal operation
Emergency stop can be performed with the a or b-contact. Assign the emergency stop function to a terminal as
described below, and select a stop mode.
2) Emergency stop
Use this setting to bring the motor to a stop within time different from the normal deceleration time specified with
.
In case of
φ
3 - 200~240V
-50/60Hz
Control power supply
backup device (option)
↓
↓
↓
↓
: Emergency stop
: Emergency DC braking control time
Input terminal
CC
= : The motor is brought to a stop within the time specified with
= : DC braking is performed at the current specified with
specified with (emergency DC braking control time).
MC
RUN
MC
RUN
Input terminal
a-contact
CC
F-48
E6581386
R/L1
S/L2
T/L3
+SU
CC
FLA
FLB
FLC
b-contact
(DC braking current) for the time