4-2 Function Mode 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. 4 Functions •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 4-104) or "Analog Output AM/AMI Terminals" (page 4-105).
•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) Does not operate because the FOC terminal is OFF. Output frequency Free running Restarts according to b088. Excitation current flows. 4-114 Parameter No. Function name Data Default setting Unit A044/A244 V/f characteristics selection 03: Sensorless vector 04: 0-Hz sensorless vector 05: Sensor vector (A244 is blank.) 00 C027 C028 C029 MP selection AM selection AMI selection 02: Output torque 11: Output torque (signed) (C028 only) 00 H003/H203 Motor capacity selection 0.20 to 75.0 Factory default kW H004/H204 Motor pole number selection 2/4/6/8/10 4 Pole Related functions A044/A244, C001 to C008