YASKAWA SGD7S-1R9D Product Manual page 188

6.3 SEMI F47 Function
Setting for A.971 Warnings (Undervoltage)
You can set whether or not to detect A.971 warnings (Undervoltage).
Pn008
(2008
hex)
 Related Parameters
The following parameters are related to the SEMI F47 function.
Pn424
(2424
hex)
Pn425
(2425
hex)
Pn509
(2509
hex)
*
Set a percentage of the motor rated torque.
Note: If you will use the SEMI F47 function, set the time to 1,000 ms.
Important
6-16
Parameter
n.0
Do not detect undervoltage warning.
(default setting)
Detect undervoltage warning and limit
n. 1
 
torque at host controller.
To detect undervoltage warnings, use
Pn424 (Torque Limit at Main Circuit Voltage
 
n. 2 Drop) and Pn425 (Release Time for Torque
Limit at Main Circuit Voltage Drop).
(i.e., only in SERVOPACK).
Torque Limit at Main Circuit Voltage Drop
Setting Range
0 to 100
Release Time for Torque Limit at Main Circuit Voltage Drop
Setting Range
0 to 1,000
Momentary Power Interruption Hold Time
Setting Range
20 to 50,000
• 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 Servo OFF command (Disable Operation com-
mand).
Meaning
Setting Unit Default Setting
1%* 50
Setting Unit Default Setting
1 ms 100
Setting Unit Default Setting
1 ms 20
When Enabled Classification
After restart Setup
Speed Position Torque
When Enabled Classification
Immediately Setup
Speed Position Torque
When Enabled Classification
Immediately Setup
Speed Position Torque
When Enabled Classification
Immediately Setup