4-29
4-2 Function Mode
4
Functions
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
(Example 4) b004: 01
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.
ON
While the Inverter is stopped
Power supply
RUN command
Inverter output
Alarm
OFF
ON
OFF
ON
OFF
While the Inverter is running
ON
Power supply
RUN command
Inverter output
Alarm
OFF
ON
OFF
ON
OFF
ON
While the Inverter is stopped
Power supply
RUN command
Inverter output
Alarm
OFF
ON
OFF
ON
OFF
While the Inverter is running
ON
Power supply
RUN command
Inverter output
Alarm
OFF
ON
OFF
ON
OFF
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