Power Loss Settings; Motor Maximum Speed - YASKAWA E-V Series User Manual

4 Operation

4.3.4 Power Loss Settings

4.3.4 Power Loss Settings

Determines whether to continue operation or turn the servo OFF when the power supply voltage is interrupted.
Pn509
An instantaneous power interruption will be detected when the main circuit power supply is turned OFF. If the
time required to restore the main circuit power supply is less than the parameter set value, the servo will con-
tinue operation. If the restoration time is the equal to or greater than the set value, the servo will be turned
OFF.
Power supply
voltage
Pn509 > t
Pn509 < t
If the uninterruptible power supplies are used for the control power supply and main circuit power supply, the
SERVOPACK can withstand an instantaneous power interruption period in excess of 1000 ms.

4.3.5 Motor Maximum Speed

By setting a lower speed, the following effects can be obtained.
• More delicate speed control and more strict protection by generating the overspeed alarm (A.510)

Motor Maximum Speed

Pn385 Setting Range
4-10
Instantaneous Power Cut Hold Time
Setting Range
20 to 1000
Momentary power interruption
Pn509
Power to motor
Pn509
Power to motor
Power supply voltage is interrupted.
• The holding time of the control power supply for the SERVOPACK is approximately
100 ms, but the time of the control power supply for the 100 V SERVOPACKs is
approximately 65 ms. If the control power supply makes control impossible during an
instantaneous power interruption, the same operation will be performed as for nor-
mally turning OFF the power supply, and the setting of the parameter will be ignored.
• The holding time of the main circuit power supply varies with the output of the SER-
VOPACK. If the load on the servomotor is large and an undervoltage alarm (A.410)
occurs, the parameter will be ignored.
Setting Unit
1 to 100 100 mm/s
Setting Unit Factory Setting
1 ms 20
OFF time t
Operation
continued
No power to motor
Speed
Factory Setting
50
Force
Speed Position
When Enabled
Immediately
Position Force
When Enabled
After restart
Classification
Setup
Classification
Setup