Mitsubishi Electric FR-A820-00046 (0.4K), Instruction Manual

Page: 350 / 1218

Torque control under Real sensorless vector control and vector control Parameters
5 - 148
Speed limit mode 4 (Pr. 1113 = "2")
●
Select this mode when the torque command is negative. The forward rotation command is for
regenerative driving (such as unwinding) and the reverse rotation command is for power driving
(such as winding). (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 positive, the setting of Pr. 809 "Reverse rotation speed limit/
reverse-side speed limit" is applied to prevent the speed from increasing in the forward 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).)
I002820E, I002821E_D
Fig. 5-54: Speed limit mode 3
ON
Speed limit value
Torque
command
value
Range where torque
control is available
Reverse side speed
limit value
Pr. 809
Range where torque
control is available
Range where torque
control is available
Reverse side speed
limit value
Start signal Start signal OFF OFF ON
Time
Speed limit value
Pr. 809
Pr. 809
Pr. 7
Pr. 8
Pr. 8
Pr. 7
Forward
rotation
Reverse
rotation
Unwinding
(regenerative driving)
Winding
(power driving)
Unwinding
(regenerative driving)
Winding
(power driving)
Forward
rotation
Reverse
rotation
Rotation speed
Range where torque
control is available
Rotation speed
Torque command
value
Reverse side speed
limit value
Pr. 809
Forward rotation
regenerative driving
Reverse rotation
power driving
Rotation speed
Time
Speed limit value
Rotation speed
For forward rotation command
For reverse rotation command
For power driving
by reverse rotation command (winding)
For regenerative driving
by forward rotation command (unwinding)
Speed limit value
Reverse side speed
limit value