Mitsubishi Electric FR-A700 EC, Instruction Manual

Page: 296 / 826

Torque control by real sensorless vector control, vector control Parameter
6 - 116
Torque command by CC-Link communication (Pr. 804 = 3, 5, 6)
●
Writing a value to Pr. 805 or Pr. 806 using the FR-A7NC (communication option) sets the
torque command value.
●
When "3 or 5" is set in Pr.804, torque command can be set in remote resister RWw1 or
RWwC using the FR-A7NC (communication option).
●
By setting "5, 6" in Pr.804, the range of torque command setting from FR-A7NC (communi-
cation option) is set from
−
327.68% to 327.67% (0.01% increments).
Torque command by 16 bit digital input (Pr. 804 = 4)
Give a torque command by 16 bit or 12 bit digital input using the FR-A7AX (plug-in option).
Change the torque characteristics in the constant power (Pr. 803)
Due to the motor characteristics, torque is reduced at or above the base frequency. Set "1" in Pr.
803 "Constant power range torque characteristic selection" when you want to limit the torque to
be constant even at or above the base frequency.
Pr. 804 Torque Command Source Setting Range
Incre-
ments
1
Torque command by parameter setting (Pr. 805 or Pr. 806) 600 to 1400
(
−
400% to 400%)
1%
3
Torque command by parameter setting (Pr. 805 or Pr. 806) 600 to 1400
(
−
400% to 400%)
1%
Torque command from remote resister (RWw1 or RWwC) with
using CC-Link communication (FR-A7NC)
5
Torque command by parameter setting (Pr. 805 or Pr. 806) 600 to 1400
(
−
400% to 400%)
1%
Torque command from remote resister (RWw1 or RWwC) with
using CC-Link communication (FR-A7NC)
−
32768 to 32767
(two's complement)
(−
327.68% to 327.67%)
0.01%
6
Torque command by parameter setting (Pr. 805 or Pr. 806) without
using CC-Link communication (FR-A7NC) 600 to 1400
(
−
400% to 400%)
1%
Torque command by parameter setting (Pr. 805 or Pr. 806) with
using CC-Link communication (FR-A7NC)
−
32768 bis 32767
(two's complement)
(−
327.68 % to 327.67%)
0.01%
Tab. 6-20: Torque command by CC-Link communication
NOTE For details of the setting with the FR-A7NC, refer to the FR-A7NC instruction manual.
NOTE For details of the setting with the FR-A7AX, refer to the FR-A7AX instruction manual.
I001526E
Fig. 6-29: Motor characteristic
T
o
rque command
Base speed
Constant torque range Constant power range
Pr. 803 = 1:
constant torque limit
Pr. 803 = 0:
constant power limit
(torque reduction)
Speed