Mitsubishi Electric FR-A700 Instruction Manual page 300

Torque control by real sensorless vector control, vector control
Forward rotation/reverse rotation speed limit (Pr. 807 = 2)
● When making a speed limit using analog input from terminal 1, the speed limit of the forward
and reverse rotation can be switched according to the polarity of voltage.
● Forward/reverse rotation speed limit is made valid when Pr. 868 "Terminal 1 function
assignment" = 5.
● For 0 to 10V input, set the forward rotation speed limit. The reverse rotation speed limit at
this time is the value of Pr. 1 "Maximum frequency".
● For −10 to 0V input, set the reverse rotation speed limit. The forward rotation speed limit at
this time is the value of Pr. 1 "Maximum frequency".
● The maximum speed of both the forward and reverse rotations is Pr. 1 "Maximum frequency".
When terminal 1 input is −10 to 0V
Torque
controllable range
The forward
rotation
speed limit
Terminal 1
(−10 to 0V)
The reverse
rotation
speed limit
Start signal
Fig. 6-33: Forward rotation/reverse rotation speed limit
NOTE
When making speed limit from terminal 1, make calibration of terminal 1. (Refer to
section 6.20.6).
b
CAUTION:
When the actual speed reaches or exceeds the speed limit value, torque control is
switched to speed control to prevent overspeed. "SL" appears on the operation panel
during speed limit operation and the OL signal is output. (Refer to section 6.4.6.)
6 - 120
Speed
Forward rotation
Reverse rotation
Speed
Torque controllable
range
Pr. 1
input
Pr. 7
OFF ON
When terminal 1 input is 0 to 10V
Pr. 1
Output
torque [%]
Terminal 1 input
Torque controllable
Terminal 1
The forward
speed limit
Time
Pr. 8
The reverse
Start signal
Speed
Forward rotation
Reverse rotation
range
Speed
Torque
controllable range
Pr. 7
input
(0 to 10V)
rotation
Pr. 1
rotation
speed limit
OFF ON
Parameter
Terminal 1 input
Output
torque [%]
Pr. 1
Pr. 8
Time
I001534E