Mitsubishi Electric FR-A800, Instruction Manual

Page: 750 / 1042

(A) Application parameters Parameters
5 - 570
Adjustment of restart operation (Pr. 163 to Pr. 165, Pr. 611)
●
The voltage cushion time at a restart can be adjusted by Pr. 163 and Pr. 164 as shown in the figure
on the left.
●
The stall prevention operation level at a restart operation can be set at 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.
Fig. 5-286:
Voltage rise at automatic restart
I001170E
NOTES Pr. 163 to Pr. 165 are invalid under Real sensorless vector control and 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.
When the restart operation is selected, undervoltage (E.UVT) and instantaneous power failure
(E.IPF) of the fault output signals become invalid.
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.
The automatic restart after instantaneous power failure function is invalid when the load torque
high-speed frequency control (Pr. 270 = "2, 3, 13") is set.
E
CAUTION:
●
Provide a mechanical interlock for MC1 and MC2. The inverter will be damaged if power
supply is input to the inverter output section.
●
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. Apply the supplied CAUTION stickers to easily visible
places when automatic restart after instantaneous power failure has been selected.
Parameters referred to
Pr. 7 Acceleration time => page 5-233
Pr. 21 Acceleration/deceleration time increments => page 5-233
Pr. 13 Starting frequency => page 5-251, page 5-253
Pr. 65, Pr. 67 to Pr. 69 Retry function => page 5-307
Pr. 78 Reverse rotation prevention selection => page 5-281
Pr. 178 to Pr. 189 (input terminal function selection) => page 5-422
Voltage
Time
Pr. 164
(Pr. 163) Pr. 58