YASKAWA SGD7C-***AMAA***, Product Manual

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5.21 SEMI F47 Function
5-67
5
Device-
S
pecific
S
etting
s

Execution with the Servo Section (Pn008 = n.

2

)
The torque is limited in the Servo Section in response to an Undervoltage warning.
The Servo Section controls the torque limit for the set time after the Undervoltage warning is
cleared.

Related Parameters
The following parameters are related to the SEMI F47 function.
*
Set a percentage of the motor rated torque.
Note: If you will use the SEMI F47 function, set the time to 1,000 ms.
Torque Limit at Main Circuit Voltage Drop
Pn424 Setting Range Setting Unit Default Setting When Enabled Classification
0 to 100 1%
*
50 Immediately Setup
Release Time for Torque Limit at Main Circuit Voltage Drop
Pn425 Setting Range Setting Unit Default Setting When Enabled Classification
0 to 1,000 1 ms 100 Immediately Setup
Pn509
Momentary Power Interruption Hold Time
Setting Range Setting Unit Default Setting When Enabled Classification
20 to 50,000 1 ms 20 Immediately Setup
•
This function handles momentary power interruptions for the voltage and time ranges stipu-
lated in SEMI F47. An uninterruptible power supply (UPS) is required as a backup for momen-
tary power interruptions that exceed these voltage and time ranges.
•
Set the SVD or Servo Section torque limit so that a torque reference that exceeds the specified
acceleration torque will not be output when the power supply for the main circuit is restored.
•
For a vertical axis, do not limit the torque to a value that is lower than the holding torque.
•
This function limits torque within the range of the SERVOPACK’s capability for power interrup-
tions. It is not intended for use under all load and operating conditions. Set the parameters
while monitoring operation on the actual machine.
•
You can set the allowable momentary power interruption time to increase the amount of time
from when the power supply is turned OFF until power supply to the motor is stopped. To stop
the power supply to the motor immediately, turn OFF the servo from the SVD.
280 V
200 V
Torque limit
S ervo
S ection
0%
The output torque i s limited to s uppre ss the
drop in the main circuit bu s voltage.
S etting of Pn425
S etting of Pn424
Torque limit s tart s .
A.971 warning
(Undervoltage)
Main circuit
bu
s voltage
Main circuit input
power
s upply
Main circuit power interruption time
The main circuit bu s voltage
increa s e s when the main
circuit power s upply recover s .
S peed Po s ition
Torque
S peed Po s ition
Torque
All Axes
S peed Po s ition
Torque
Important