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Chapter 4
4.2.102 Torque LAD stop function
The torque LAD stop function is effective when "03" (sensorless vector
control), "04" (0Hz-range sensorless vector control), or "05" (vector
control with sensor) is specified for the V/F characteristic curve
selection (A044/A244). This function temporarily stops the
frequency-based deceleration function (LAD) when the torque
limitation function operates.
Item
Function code
V/F characteristic
curve selection
Torque limit selection
Torque limit (1)
Torque limit (2)
Torque limit (3)
Torque limit (4)
Torque limit LADSTOP
enable
Terminal function
4.2.103 High-torque multi-motor operation
The high-torque multi-motor operation function allows you to make
a single inverter operate the two motors (having the same
specifications) that drive a single load (machine). This function is
effective when the V/F characteristic curve selection is the
sensorless vector control or 0Hz-range sensorless control.
To use the function, adjust the inverter settings required for the
sensorless vector control (see Section 4.2.92) or 0Hz-range
sensorless control (see Section 4.2.93), except for the motor
constant settings. Adjust the motor constants as follows:
1) For constants R1, R2, and L, specify a value half as large as that
normally specified for one motor.
2) For constant Io, specify a value twice as large as that normally
specified for one motor.
3) For constant J, specify a value half as large as the total moment
of inertia of the two motors and the load connected to them.
Select the motor capacity that is closest to the collective capacity of both motors.
If different loads are driven by the two motors operated by the inverter, the load fluctuations on one motor may
change the other motor's operation status, and the inverter may be unable to normally control the motors. Be sure to
configure your system so that the motors drive only a single load or multiple loads that can, at least, be recognized as a
single load.
Data or range of data
A044/A244
b040
b041
CT mode:
0 to 200 (%)
b042
<0 to 180(%)>
b043
VT mode:
0 to 150 (%)
b044
<0 to 150(%)>
b045
C001 to C008
A044/A244: V/F characteristic curve selection,
1st/2nd motors
b040: Torque limit selection
b041 to b044: Torque limits (1) to (4)
b045: Torque limit LADSTOP enable
03
Sensorless vector control
04
0Hz-range sensorless vector control
05
Vector control with sensor (not available for A244)
00
Quadrant-specific setting mode
01
Terminal-switching mode
02
Analog input mode
03
Option 1 mode
04
Option 2 mode
Forward powering (in quadrant-specific setting mode)
Reverse regeneration (in quadrant-specific setting
mode)
Reverse powering (in quadrant-specific setting mode)
Forward regeneration (in quadrant-specific setting
mode)
00
Disabling the torque LAD stop function
01
Enabling the torque LAD stop function
40
Whether to enable torque limitation
41
Torque limit switch 1
42
Torque limit switch 2
A044/A244: V/F characteristic curve selection, 1st/2nd
motors
F001: Output frequency setting
b040: Torque limit selection
b041 to b044: Torque limits (1) to (4)
H002/H202: Motor data selection, 1st/2nd motors
H003/H203: Motor capacity, 1st/2nd motors
H004/H204: Motor poles setting, 1st/2nd motors
H005/H205: Motor speed constant, 1st/2nd motors
H020/H220: Motor constant R1, 1st/2nd motors
H021/H221: Motor constant R2, 1st/2nd motors
H022/H222: Motor constant L, 1st/2nd motors
H023/H223: Motor constant Io, 1st/2nd motors
H024/H224: Motor constant J, 1st/2nd motors
H050/H250: PI proportional gain, 1st/2nd motors
H051/H251: PI integral gain, 1st/2nd motors
H052/H252: P proportional gain setting, 1st/2nd motors
4-94
Explanation of Functions
Related code
Description
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