Mitsubishi Electric FR-E800 Series Instruction Manual page 408

 Restart cushion time (Pr.58)
• The cushion time is the time taken to raise the voltage to the level required for the specified speed after the motor speed
detection (output frequency before the instantaneous power failure when Pr.162 = "1 or 11").
• Normally, the motor runs at the initial value as it is. However, adjust to suit the moment of inertia (J) of the load or the size
of the torque.
NOTE
• Pr.58 is invalid under Real sensorless vector control or Vector control.
 Adjustment of restart operation (Pr.165, Pr.611)
• The stall prevention operation level at a restart operation can be set in Pr.165.
• Using Pr.611, the acceleration time to reach Pr.20 Acceleration/deceleration reference frequency after a restart
operation can be set. This can be set individually from the normal acceleration time.
NOTE
• Pr.165 is invalid under Real sensorless vector control or Vector control.
• Changing the Pr.21 setting does not affect the Pr.611 setting increment.
• Changing the terminal assignment using Pr.178 to Pr.189 (Input terminal function selection) may affect the other functions.
Set parameters after confirming the function of each terminal.
• The SU and FU signals are not output during the restart. These signals are output after the restart cushion time passes.
• Restart operation is also performed after the inverter reset is released or after the retry by the retry function occurs.
CAUTION
• When the automatic restart after instantaneous power failure function is selected, the motor suddenly starts
(after reset time passes) when an instantaneous power failure occurs. Stay away from the motor and machinery.
When the automatic restart after instantaneous power failure function has been selected, apply the CAUTION
sticker(s), which are found in the Inverter Safety Guideline enclosed with the inverter, to easily visible places.
Parameters referred to
Pr.7 Acceleration time, Pr.21 Acceleration/deceleration time
Pr.13 Starting frequencypage 207,
Pr.65, Pr.67 to Pr.69 Retry functionpage 250
Pr.78 Reverse rotation prevention
Pr.178 to Pr.189 (Input terminal function
incrementspage 196
page 208
selectionpage 231
selection)page 328
15.7 Automatic restart after instantaneous power failure / flying start with an induction motor
15. (A) Application Parameters
11
12
13
14
15
16
17
18
19
20
407