Automatic Restart After Instantaneous Power Failure/Flying Start With An Induction Motor - Mitsubishi Electric FR-F820-00046 Instruction Manual

Fr-f800 series
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For reverse action
Input pressure
Input pressure warning level
(Pr.1378)
Input pressure fault level
(Pr.1379)
Set point
Output frequency
NOTE
• When the control switches between the first PID control and second PID control while the set point is changed by the Pr.1380
setting value or while the Y229 (Y230) signal is output, the set point first returns to its original value, and is changed to the
value after the switching.
• When the PID input pressure control function and the PID upper/lower limit pre-warning function are used simultaneously,
each function may change the set point. When the set point change is attempted by both functions, the change by the PID
input pressure control function has priority.
• When the PID input pressure control function and the PID sleep boost function are used simultaneously, each function may
change the set point. When the set point change is attempted by both functions, the change by the PID input pressure control
function has priority. (The sleep state is established without applying the set point change by the PID sleep boost function.)
5.11.12 Automatic restart after instantaneous power
failure/flying start with an induction motor
V/F
V/F
V/F
Magnetic flux
Magnetic flux
Magnetic flux
The inverter can be restarted without stopping the motor operation in the following situations:
• When switching from commercial power supply operation over to inverter running
• When an instantaneous power failure occurs during inverter running
• When the motor is coasting at start
446
5. PARAMETERS
5.11 (A) Application parameters
Input pressure
Pr.1370
Pr.1370
Pr.1370
Pr.1370
Pr.1370
Pr.1370
Pr.1380
Pr.1373
Pr.1373
ON
Y229
Y230
Pr.1370
Pr.1370
Pr.1370
ON
When Pr.1381 = "0"
When Pr.1381 = "1"
Output shutoff
(Pr.1381 = "0")
When Pr.1381="1", operation can be
restarted after the input pressure
reaches or exceeds the Pr.1378 setting.
Time
Time
ON
Deceleration stop
Deceleration stop
Deceleration stop
(Pr.1381 = "1")
(Pr.1381 = "1")
(Pr.1381 = "1")
Time

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