6.3 SEMI F47 Function
6-15
6
Application Function
s
Setting for A.971 Warnings (Undervoltage)
You can set whether or not to detect A.971 warnings (Undervoltage).
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.
Parameter
Meaning
When Enabled
Classification
Pn008
n.
0
(default setting)
Do not detect undervoltage warning.
After restart
Setup
n.
1
Detect undervoltage warning and limit
torque at host controller.
n.
2
Detect undervoltage warning and limit
torque with Pn424 and Pn425
(i.e., only in SERVOPACK).
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 host controller or SERVOPACK 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 momentary power interruption hold 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, use the /S-ON (Servo ON) signal.
Speed
Position
Torque
Speed
Position
Torque
Speed
Position
Torque
Important
