Mitsubishi Electric 800 Series Instruction Manual page 150

FR-A800/A800 Plus Series
Instruction Manual Supplement
1
Emergency drive
V/F V/F V/F Magnetic flux Sensorless Sensorless Sensorless
Magnetic flux Magnetic flux
This function is used in case of emergency such as a fire to forcibly continue inverter operation to drive a motor without
activating protective functions even if the inverter detects a fault. Using this function may cause damage of the motor
or the inverter because driving the motor is given the highest priority. Use this function for emergency operation only.
When the inverter is damaged by a fault, the motor operation can be continued by switching to the commercial power
supply operation.
The emergency drive function is available only for standard structure models and IP55 compatible models.
Pr. Name
523
Emergency drive
*1
mode selection
H320
524
Emergency drive
*1*2
running speed
H321
Emergency drive
515
dedicated retry
*1
H322
count
Emergency drive
1013
running speed after
*1
H323
retry reset
Emergency drive
514
dedicated waiting
*1
H324
time
136 MC switchover
A001 interlock time
Automatic
switchover
139
frequency from
A004
inverter to bypass
operation
57 Restart coasting
A702 time
*1 The setting is available for the standard structure model and the IP55 compatible model.
*2 Set Pr.524 after setting Pr.523.
*3 When Pr.523 = "100, 200, 300, or 400", the emergency drive is activated regardless of the Pr.524 setting.
PM PM PM
Initial value
Setting range
FM CA
100, 111, 112, 121,
122, 123, 124,
200, 211, 212, 221,
222, 223, 224,
300, 311, 312, 321,
9999
322, 323, 324,
400, 411, 412, 421,
422, 423, 424
9999
0 to 590 Hz
9999
0% to 100%
*3
9999
1 to 200
1
*3
9999
60 Hz 50 Hz 0 to 590 Hz
0.1 to 600 s
9999
9999
1 s 0 to 100 s
0 to 60 Hz
9999
8888, 9999
0
9999
0.1 to 30 s
9999
Select the operation mode of the emergency drive.
Emergency drive disabled.
Set the running frequency in the fixed frequency mode of
*3
the emergency drive (when the fixed frequency mode is
selected in Pr.523)
Set the PID set point in the PID control mode of the
*3
emergency drive (when the PID control mode is selected in
Pr.523)
Emergency drive disabled.
Set the retry count during emergency drive operation.
Without retry count excess (no restriction on the number of
retries).
Set the frequency for operation after a retry when any of
E.CPU, E.1 to E.3, and E.5 to E.7 occurs during emergency
drive operation.
Set the retry waiting time during emergency drive
operation.
The Pr.68 setting is applied to the operation.
Set the operation interlock time for MC2 and MC3.
Set the frequency at which the inverter-driven operation is
switched over to the commercial power supply operation
when the condition for the electronic bypass is established
during emergency drive operation.
Electronic bypass during emergency drive is disabled.
Coasting time differs according to the inverter capacity.
(Refer to the description of the automatic restart after
instantaneous power failure function in the Instruction
Manual (Detailed) or the Instruction Manual (Function).)
Set the waiting time for the inverter to perform a restart after
restoring power due to an instantaneous power failure.
No restart
1
Description
BCN-C22005-959