Mitsubishi Electric FR-A700 EC, Instruction Manual

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Parameter Torque control by real sensorless vector control, vector control
FR-A700 EC 6 - 113
6.4.3 Torque control
●
Torque control is exercised to develop torque as set in the torque command.
●
The motor speed becomes constant when the motor output torque and load torque are
balanced. For torque control, therefore, the speed is determined by the load.
●
For torque control, the motor gains speed as the motor output torque becomes greater than
the motor load. To prevent overspeed, set the speed limit value so that the motor speed
does not increase too high. (Torque control is disabled under speed limit since speed control
is exercised.)
●
When speed limit is not set, the speed limit value setting is regarded as 0Hz to disable torque
control.
6.4.4 Torque command (Pr. 803 to Pr. 806)
Torque command source for torque control can be selected.
Pr.
No.
Name
Initial
Value
Setting
Range
Description Parameters referred to
Refer to
Section
803
Constant power range
torque characteristic
selection
0
0
Constant motor
output limit Select the torque
limit in the con-
stant power region
by torque limit set-
ting.
868
C16–C19
Terminal 1 func-
tion assignment
Terminal 1 bias,
gain torque 6.3.2
6.20.6
1
Constant torque
limit
804
Torque command source
selection
0
0
Torque command by terminal 1 analog
input (Refer to section 6.20.6.)
1
Torque command by parameter setting
(Pr. 805 or Pr. 806)
(
−
400% to +400%)
3
Torque com-
mand by parame-
ter setting
(Pr. 805 or
Pr. 806)
(
−
400% to
+400%)
Torque command
with using CC-Link
communication
(FR-A7NC)
Setting from the
remote resistor
can be made.
(
−
400% to
+400%)
4 12 bit/16 bit digital input (FR-A7AX)
5
Torque com-
mand by parame-
ter setting
(Pr. 805 or
Pr. 806)
(
−
400% to
+400%)
Torque command
with using CC-Link
communication
(FR-A7NC)
Setting from the
remote resistor
can be made.
(
−
327.68% to
+327.67%)
6
Torque command
with using CC-Link
communication
(FR-A7NC))
(
−
327.68% to
+327.67%)
805
Torque command value
(RAM)
1000% 600–1400%
Writes the torque command value to
the RAM.
On the assumption that 1000% is 0%,
the torque command is set by an offset
from 1000%.
806
Torque command value
(RAM, EEPROM)
1000% 600–1400%
Writes the torque command value to
the RAM and EEPROM.
On the assumption that 1000% is 0%,
the torque command is set by an offset
from 1000%.
Sensorless Sensorless Sensorless Vector Vector Vector