Mitsubishi Electric FR-A820-00046 (0.4K) Instruction Manual page 278

NOTE
• To perform speed limit by using terminal 1, calibrate terminal 1. (Refer to
 Speed limit mode 2 (Pr.1113 = "0" initial value)
• Following the polarity change in the torque command, the polarity of the speed limit value changes. This prevents the
speed from increasing in the torque polarity direction. (When the torque command value is 0, the polarity of the speed limit
value is positive.)
• When Pr.807 Speed limit selection = "0, 2", the setting during speed control is applied for the speed limit. When Pr.807
Speed limit selection = "1", Pr.808 Forward rotation speed limit/speed limit is applied for the speed limit.
• When the load has reversed the rotation opposite to the torque polarity, the setting of Pr.809 Reverse rotation speed
limit/reverse-side speed limit is applied for the speed limit. (The speed limit value and reverse-side speed limit value are
limited at Pr.1 Maximum frequency (maximum 400 Hz under Vector control).)
Reverse-side
speed limit value
-Pr.809
-Speed limit value
Rotation speed
Pr.7
Speed limit value
-Pr.809
Reverse-side
speed limit value
OFF
Start signal
When the torque command value is positive
 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 following
figures.)
• When Pr.807 Speed limit selection = "0, 2", the setting during speed control is applied for the speed limit. When Pr.807
Speed limit selection = "1", Pr.808 Forward rotation speed limit/speed limit is applied for the speed limit.
Torque
command
value Speed limit value
Range where torque
control is available
Rotation speed
Reverse-side
speed limit value
Pr.809
Range where torque
control is available
Pr.8
Time
ON
5.4 Torque control under Real sensorless vector control and Vector control
page 482.)
Range where torque
Rotation speed
control is available
Pr.809
Reverse-side
speed limit value
Speed limit value
Pr.7
OFF ON
Start signal
When the torque command value is negative
1
2
3
4
5
6
7
8
9
10
Time
Pr.8
277
5. PARAMETERS