Mitsubishi Electric FR-A820-00046 Instruction Manual page 349

Parameters
Speed limit mode 3 (Pr. 1113 = "1")
● Select this mode when the torque command is positive. The forward rotation command is for
power driving (such as winding) and the reverse rotation command is for regenerative driving
(such as unwinding). (Refer to each inside of the frames in the following figures.)
● When Pr. 807 "Speed limit selection" = "0 or 2", the speed setting value for speed control is applied
for the speed limit. When Pr. 807 "Speed limit selection" = "1", the setting of Pr. 808 "Forward
rotation speed limit/speed limit" is applied for the speed limit.
● When the torque command becomes negative, the setting of Pr. 809 "Reverse rotation speed limit/
reverse-side speed limit" is applied to prevent the speed from increasing in the reverse rotation
direction. (The speed limit value and reverse-side speed limit value are limited at Pr. 1 "Maximum
frequency" (maximum 400 Hz under vector control).
Unwinding
(regenerative driving)
Forward
rotation
Winding
(power driving)
Reverse
rotation
Reverse side speed
limit value
Pr. 809
For forward rotation command
Rotation speed
Pr. 7
Speed limit value
Speed limit value
Pr. 809
Reverse side speed
limit value
Start signal OFF ON
For power driving
by forward rotation command (winding)
Fig. 5-53: Speed limit mode 3
FR-A800
Torque control under Real sensorless vector control and vector control
Winding
(power driving)
Forward
rotation
Unwinding
(regenerative driving)
Reverse
rotation
Torque command
value
Speed limit value
Forward rotation
power driving
Rotation speed
Range where torque
control is available
Range where torque
control is available
Pr. 8
Time
Reverse side speed Speed limit value
limit value
Pr. 809
Reverse rotation
regenerative drive
For reverse rotation command
Range where torque
Rotation speed
control is available
Speed limit value
Pr. 809
Reverse side speed
limit value
Reverse side speed
Pr. 7
limit value
Start signal OFF ON
For regenerative driving
by reverse rotation command (unwinding)
Torque command
value
Pr. 809
Rotation speed
Range where torque
control is available
Time
Pr. 8
I002818E, I002819E
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