Mitsubishi Electric FR-A820-00046 Instruction Manual page 318

Torque control under Real sensorless vector control and vector control
Setting separately for forward and reverse rotation
(Pr. 1113 = "9999", Pr. 807 = "1", Pr. 808, Pr. 809)
Set the speed limit by Pr. 808 "Forward rotation speed limit/speed limit" for forward rotation, and by
Pr. 809 "Reverse rotation speed limit/reverse-side speed limit" for reverse rotation.
When Pr. 809 = "9999 (initial value)", speed limit is determined by the setting value of Pr. 808 for both
forward and reverse rotations.
Speed limit
Output
torque [%]
Speed limit
Fig. 5-50:
Forward/reverse rotation speed limit using analog input (Pr. 1113 = "9999", Pr. 807 = "2")
● When performing speed limit by analog inputs to terminal 1, speed limit can be switched between
forward and reverse rotation by its voltage polarity.
● When Pr. 868 "Terminal 1 function assignment" = "5", forward/reverse speed limit is enabled.
● If 0 to 10 V is input, forward rotation speed limit is applied. Reverse rotation speed limit at this
time is the value of Pr. 1 "Maximum frequency".
● If
10 to 0 V is input, reverse rotation speed limit is applied. Forward rotation speed limit at this
–
time is the value of Pr. 1.
● Upper speed limit is the value of Pr. 1 for both forward and reverse rotations.
5 - 138
Speed
Torque controllable
range
Forward rotation
Pr. 808
Pr. 809
Reverse rotation
Set the forward rotation and reverse rotation individually
Forward rotation
Pr. 7
Speed limit
Speed limit
Reverse rotation
ON
STF (STR)
Parameters
Pr. 8
Pr. 808
Time
Pr. 809
Torque controllable
range
OFF
I001533E