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7 Detailed Functions
High-function General-purpose Inverter 3G3RX-V1 User’s Manual (I578-E1)
7-5 Multi-function Terminal Functions (Group C)
7
This function allows you to monitor an estimated motor output torque, when Sensorless vector control,
0-Hz sensorless vector control, or Sensor vector control is selected as the control method.
• To monitor the motor output torque via the Digital Operator, set the Output Torque Monitor (d012). To
monitor the motor output torque as a signal from the control circuit terminal block, refer to the Digital
MP Terminal on page 7-140 or Analog Output AM/AMI Terminals on page 7-142 section.
• When the 1st/2nd Control Method (A044/A244) is set to 00 (Constant torque characteristics), 01
(Reduced torque characteristics), or 02 (Free V/f setting), this function is disabled. Note that the
output signal to the display or the control circuit terminal block will be indefinite. This function shows
the output torque during synchronous rotation at the rated frequency equivalent to the rated motor
output as 100%.
• Since this function estimates the output torque based on the motor current, the accuracy is
approximately 20% when a motor with the same output capacity as the inverter is used.
Torque Monitor Function
Parameter No. Function name Data Default data Unit
A044/A244/
A344
1st/2nd/3rd Control
Method
00: Constant torque characteristics
01: Reduced torque characteristics
02: Free V/f setting
03: Sensorless vector control
*1
04: 0-Hz sensorless vector control
*1
05: Sensor vector control (V2)
*1
*1. The 1st Control Method (A044) can be set to 00 to 05; the 2nd Control Method (A244) can be set to 00 to 04;
the 3rd Control Method (A344) can be set to 00 to 01.
When the Heavy Load/Light Load Selection (b049) is set to 01 (Light load mode), this parameter cannot be set
to 04 or 05.
00 –
C027/C028/
C029
MP Selection/
AM Selection/
AMI Selection
(Heavy load mode only)
02: Output torque
11: Output torque (signed)
(C028 only)
00 –
H003/H203 1st/2nd Motor Capacity
0.1/0.2/0.4/0.55/0.75/1.1/1.5/2.2/3.0/
3.7/4.0/5.5/7.5/11.0/15.0/18.5/22/30/
37/45/55/75/90/110/132
Maximum
applicable
motor capacity
kW
H004/H204
1st/2nd Motor Pole
Number
2/4/6/8/10 4 poles
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