Mitsubishi Electric FR-A720-0.4K Instruction Manual page 134

Torque control by real sensorless vector
control, vector control
Speed
Forward rotation
Pr.7
Speed setting
value during
speed control
Reverse rotation
STF(STR) ON
REMARKS
⋅
When the above speed limit command is greater than the Pr. 1 Maximum frequency value, the speed limit value is the Pr. 1
Maximum frequency value, and when the speed limit command is less than the Pr. 2 Minimum frequency value, the speed limit
value is the Pr. 2 Minimum frequency value. Similarly when the speed limit command is smaller than Pr. 13 Starting frequency , the
speed limit value is 0Hz.
⋅
When speed limit is to be made using analog input, perform calibration of the analog input terminal 1, 2 and 4. (Refer to page
288.)
CAUTION
When speed limit is to be made using the analog command (terminal 1,2,4), turn off the external signals (RH, RM, RL). If any of
external signals (RH, RM, RL) is on, multi-speed limits are made valid.
(3) Set the forward rotation and reverse rotation individually (Pr. 807 = "1")
Set the speed limit during foward rotation using Pr. 808 Forward rotation speed limit and the speed limit during reverse
rotation using Pr. 809 Reverse rotation speed limit.
The speed during forward and reverse rotation is limited at the setting value of Pr. 808 when "9999" (initial value) is set
in Pr. 809 .
Speed limit
150
Output torque
(%)
Speed limit
124
The speed setting
value is a speed
limit value.
Pr.8
Time
Torque controllable
range
OFF
Speed
Torque controllable range
Forward rotation
Pr.808
Speed limit
150
0
Speed limit
Pr.809
Reverse rotation
STF(STR)
(2) Use the speed command for speed control
(Pr. 807 = "0" initial value)
⋅ Set the speed limit in the same method as speed setting
for speed control (speed setting by the PU (FR-DU07/
FR-PU07/FR-PU04), multi-speed setting, options, etc.)
⋅ According to the acceleration time set in Pr. 7 Acceleration
time, the limit level is increased from 0Hz upon turning on
of the start signal, and when the start signal turns off, the
speed limit level is decreased from the then speed limit
level to the DC injection brake operation speed in Pr. 10
to a stop in accordance with the deceleration time set in
Pr. 8 Deceleration time.
Forward rotation
Pr.7
Reverse rotation
ON
Pr.8
Pr.808
Time Time Time
Pr.809 Pr.809 Pr.809
Torque controllable range Torque controllable range Torque controllable range
OFF