4-2 Function Mode „ Alarm Selection for Momentary Power Interruption/Undervoltage During Stop •Use b004 to select whether to enable an alarm output in case of momentary power interruption or undervoltage. •An alarm output continues while Inverter control power supply remains. Alarm output for momentary power interruption and undervoltage during stop (Examples 3 and 4) (Example 3) b004: 00 While the Inverter is stopped While the Inverter is running Power supply OFF ON OFF ON ON Power supply OFF ON OFF 4 RUN command RUN command Inverter output Alarm ON OFF Inverter output Alarm ON OFF Functions (Example 4) b004:
01 While the Inverter is stopped ON While the Inverter is running RUN command Power supply OFF ON OFF RUN command ON Power supply OFF ON OFF Inverter output Inverter output Alarm ON OFF Alarm ON OFF Electronic Thermal Function This function electronically protects the motor from overheating. •Causes an overload trip (E05) to protect the motor from overheating by setting according to the motor rated current. •Provides the most appropriate protection characteristics, taking into account the decline of the motor cooling capability at a low speed. •To set a value over the rated current of the motor, be careful of any temperature rise of the motor.
* To switch to the 2nd control, allocate 08 (SET) to the multi-function input terminal and then turn it on. 4-29 Parameter No. Function name Data Default setting Unit b012 Electronic thermal level 0.2 × Rated current to 1.0 × Rated current Rated current A * b212 2nd electronic thermal level Rated current A b013 Electronic thermal characteristics selection 00: Reduced torque characteristics 1 01: Constant torque characteristics 02: Reduced torque characteristics 2 00 ⎯ * b213 2nd electronic thermal characteristics selection 00 ⎯ Related functions C021, C024