Mitsubishi Electric FR-A800 Series Instruction Manual page 294

• 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).)
(regenerative driving)
Forward
rotation
Reverse
rotation
Speed limit value
Rotation speed
Pr.809
Reverse-side
speed limit value
Speed limit value
Start signal
by reverse rotation command (winding)
 Speed limit mode switching via external terminals (Pr.1113 = "10")
• The speed limit mode can be switched between 3 and 4 using the Torque control selection (X93) signal.
• To assign the X93 signal, set "93" in any of Pr.178 to Pr.189 (Input terminal function selection).
X93 signal
OFF
ON
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Unwinding Winding
(power driving)
Winding Unwinding
(power driving) (regenerative driving)
Reverse-side
Torque
speed limit value
command
value
Pr.809
Reverse rotation
power driving
Range where torque
control is available
For reverse rotation command
Range where torque
control is available
Pr.7
OFF ON
For power driving
Speed limit mode
Mode 3 (positive torque command, same status as
setting Pr.1113 = "1")
Mode 4 (negative torque command, same status
as setting Pr.1113 = "2")
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Forward
rotation
Reverse
rotation
Torque
command
value
Rotation speed
Forward rotation
regenerative driving
Rotation speed
Pr.809
Reverse-side
speed limit value
Speed limit value
Time
Pr.8
Start signal
by forward rotation command (unwinding)
5.4 Torque control under Real sensorless vector control and Vector control
Reverse-side
speed limit value
Speed limit value
Pr.809
Range where torque
control is available
For forward rotation command
Range where torque
control is available
Pr.7
OFF ON
For regenerative driving
1
2
3
4
5
6
7
Rotation speed
8
9
10
Time
Pr.8
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5. PARAMETERS