Torque Monitor Function - Omron SYSDRIVE RX Series User Manual

Torque Monitor Function

•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.
Parameter No. Function name
V/f characteristics
A044/A244
selection
C027 MP selection
C028 AM selection
C029 AMI selection
H003/H203 Motor capacity selection
Motor pole number
H004/H204
selection
•To use the monitor via the Digital Operator, select display code d012.
•To use the monitor with a signal from the control terminal block, refer to "Digital MP Terminal"
(page 4-106) or "Analog Output AM/AMI Terminals" (page 4-107).
•If "VC", "special VP", or "free V/f setting" is selected in V/f characteristics selection A044/A244, this
function is disabled, and the display or the output signal from the control terminal block is not
defined.
•For a torque monitor value of this function, the output torque at the rated frequency equivalent to
the motor's output rating during synchronous rotation is indicated as 100%.
•Since this function estimates output torque based on the motor current, the accuracy is approx.
20% when a motor with the same output capacity as the Inverter is used.
Preliminary Excitation Function (FOC)
•This function supplies excitation current from an input terminal to establish magnetic flux
preliminarily, when "03" (sensorless vector control), "04" (0-Hz sensorless vector control), or "05"
(sensor vector control) is selected in V/f characteristics selection A004/A244.
•Allocate 55 (FOC) to the desired multi-function input.
•The Inverter does not accept the RUN command unless the FOC terminal is turned on when FOC
is allocated.
•If the FOC terminal is turned off during operation, the Inverter goes into free-run status. If the FOC
terminal is turned on again, the Inverter restarts according to the setting of free-run stop selection
b088.
FOC
FW (RV)
Output frequency
Related functions
03: Sensorless vector
04: 0-Hz sensorless vector
05: Sensor vector (A244 is blank.)
02: Output torque
11: Output torque (signed) (C028 only)
0.20 to 160.0
2/4/6/8/10
Excitation current flows.
4-2 Function Mode
Data Default setting
Factory default
Free running Restarts according to b088.
A044/A244, C001 to C008
Unit
⎯
00
⎯
00
kW
4 Pole
Does not operate because
the FOC terminal is OFF.
4-116
4