Mitsubishi FR-A740-00023-EC, Instruction Manual

Page: 131 / 474

121
Torque control by real sensorless vector
control, vector control
4
P
ARAME
T
E
R
S
(4) 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 .
REMARKS
⋅
When making speed limit from terminal 1, make calibration of terminal 1. (Refer to page 288.)
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.
♦
Parameters referred to
♦
Pr. 1 Maximum frequency, Pr. 2 Minimum frequency Refer to page 151
Pr. 7 Acceleration time, Pr. 8 Deceleration time Refer to page 167
Pr. 13 Starting frequency Refer to page 169
Pr. 4 to Pr. 6, Pr. 24 to Pr. 27, Pr. 232 to Pr. 239 (Multi-speed operation) Refer to page 160
Pr. 868 Terminal 1 function assignment Refer to page 274
Pr. 125, Pr. 126, C2 to C7, C12 to C15 (frequency setting voltage (current) bias/gain) Refer to page 282
Pr.7
ON OFF Start signal
Speed
Time
Speed
Forward rotation
Reverse rotation
Output
torque (%)
0
Speed
Reverse rotation
Forward rotation
Output torque (%)
Terminal 1 input
Pr.1
0
Torque controllable range
Torque controllable range
Torque controllable range
Terminal 1
input
Terminal 1 input
(-10 to 0V)
The reverse
rotation speed
limit
150 150 150 150
Pr.1
Pr.8
Pr.1
Pr.7
ON OFF
Start signal
Speed
Time
Terminal 1 input (0 to 10V)
The forward rotation speed
limit
Pr.8
Pr.1
Torque controllable range
When terminal 1 input is "-10 to 0V" When terminal 1 input is "0 to 10V"
The reverse rotation
speed limit
The forward rotation
speed limit