Operation Selection Function (Pr. 251); Output Phase Failure Protection Selection (Pr. 251) - Mitsubishi Electric FR-V500 Instruction Manual

(1) Pr. 250 = "9999"
When the start signal turns off, the motor is decelerated to a stop.
Start signal
Output
speed
(r/min)
(2) Pr. 250 = other than "9999" (Output is shut off after preset time)
The output is shut off when the time set in Pr. 250 has elapsed after the start signal had turned off. The motor coasts
to a stop.
Start signal
Output
speed
(r/min)
RUN signal
CAUTION
1. The RUN signal turns off when the output stops.
2. When the start signal is turned on again during motor coasting, the motor starts at 0Hz.
3. The output speed becomes the speed limit value during torque control.

3.23 Operation selection function (Pr. 251)

3.23.1 Output phase failure protection selection (Pr. 251
You can disable the output phase failure protection (E.LF) function that will stop the inverter output if any of
the three phases (U, V, W) on the inverter output side (load side) opens.
Parameter Name
Output phase
251 failure protection
selection
ON
Decelerated when start signal turns off.
Minimum
Setting
Setting Factory Setting
Range
Increments
0, 1 1
155
Operation selection function (Pr. 251)
OFF
Deceleration time (time set in Pr. 8, etc.)
DC brake
Time
OFF
Output is shut off when the preset time has
elapsed after start signal had turned off.
Pr.250
Motor coasts to a stop.
Time
OFF
speed torque
Description
0: Without output
phase failure
1 protection
1: With output phase
failure protection
position )
Remarks
Extended mode
3