Yaskawa Sigma-5 User Manual: Design and Maintenance - Rotary Motors - Analog Voltage and Pulse Train Reference - Manual (Page 130)

5 Operation
5.2.6 Instantaneous Power Interruption Settings
5-16
5.2.6 Instantaneous Power Interruption Settings
Determines whether to continue operation or turn OFF the servomotor’s power when the power supply voltage
to the SERVOPACK's main circuit is interrupted.
If the power interruption time is shorter than the set value in Pn509, the servomotor will continue operation. If
it is longer than the set value, the servomotor’s power will be turned OFF during the power interruption. The
servomotor is turned ON when power supply to the main circuit recovers.
Note: If the instantaneous power interruption is longer than the set value of Pn509, the /S-RDY signal turns OFF.
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.
Pn509
Instantaneous Power Cut Hold Time
Classification
Setting Range Setting Unit Factory Setting When Enabled
20 to 1000 1 ms 20 Immediately Setup
• The holding time of the control power supply for the 200-V SERVOPACKs is approxi-
mately 100 ms. The holding time of the control power supply for the 100-V SERVO-
PACKs 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 normally turning OFF the power supply, and the setting of Pn509 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 setting of Pn509 will be ignored.
• The holding time of the control power supply (24 VDC) for the 400-V SERVOPACKs
depends on the capability of the power supply (not included). Check the power supply
before using the application.
Speed Position Torque
Instantaneous power interruption
Set value for Pn509 ≥ OFF time (t)
Instantaneous power interruption
OFF time (t)
Power OFF
Set value for
Pn509 ≥ OFF time (t) Set value for
Pn509 < OFF time (t)
Main circuit
power supply
Set value for
Pn509
Servomotor
status
Power ON
Instantaneous power interruption
Set value for Pn509 < OFF time (t)
Instantaneous power interruption
Forced OFF
OFF time (t)
Main circuit
power supply
Set value for
Pn509
Servomotor
status
Power ON
Operation
continues.