6-22
MHT258a (Engl.)
6.3.7 Undervoltage
Selects the operation when undervoltage at main circuit input is detected.
System parameter 84, 85
Para.
Name
Setting range
Initial value
Change
84
Operation at undervoltage
0: Rapid deceleration to a stop
1: Free-run
0
Power
85
Alarm detection at undervoltage
0: No detection
1: Detects
1
Power
■
Operation at undervoltage (system para. 84)
Specifies the motor operation when undervoltage has been detected while the run command [RUN] is on.
Setting range
Operation
0: Rapid decel. to a stop
The motor rapidly decelerates to a stop (within amplifier’s highest capacity).
1: Free-run
The motor decelerates (or accelerates) with free-run condition according to the load torque.
■
Alarm detection at undervoltage (system para. 85)
Specifies the alarm detection operation when undervoltage has been detected while the run command [RUN] is on.
Setting range
Operation
0: No detection
Alarm is not detected.
1: Detects
Undervoltage alarm was detected.
If “0” has been set, the motor stops according to the preset operation to be made at undervoltage, and alarm detection will not be output.
Remark: If the power voltage decrease (undervoltage) due to momentary power failure is detected, the motor decelerates by system para.
84 setting. Due to regenerative power generated by the motor during deceleration, voltage level may exceed undervoltage level.
In this case, the motor starts deceleration at the undervoltage level. After that, the motor will accelerate again after alarm detection
of undervoltage is released.
Summary of Contents for Faldic-a Series
Page 1: ...RYS V Type User s Manual MHT258a Engl...
Page 55: ...3 28 MHT258a Engl 2 RYS amplifier a 0 03 to 0 2 kW 5 5 150 0 5 0 5 53 60 160 130...
Page 56: ...3 29 MHT258a Engl b 0 4 kW 160 130 60 80 53 150 0 5 0 5 5 5...
Page 57: ...3 30 MHT258a Engl c 0 75 kW 130 160 60 100 54 39 0 5 0 5 150 0 5 0 5 5 5...
Page 58: ...3 31 MHT258a Engl d 1 to 1 5 kW 160 130 60 115 54 54 0 5 0 5 150 0 5 0 5 5 5 Cooling fan...
