Yaskawa Sigma-5 User Manual: Design and Maintenance - Rotary Motors - Manual (Page 105)

4 Operation
4.2.10 SEMI-F47 Function (Torque Limit Function for Low Power Supply Voltage for Main Circuit)
4-22
(1) Execution Method
This function can be executed either with the host controller or independently with the SERVOPACK.
Pn008.1 is used to specify whether the function is executed with the host controller or independently with the
SERVOPACK.
Execution with Host Controller (Pn008=n. 1 )
The host controller limits the torque in response to a low-voltage warning.
The torque is no longer limited when the low-voltage warning is cleared.
Execution Independently with SERVOPACK (Pn008=n. 2 )
The torque is limited in the SERVOPACK in response to a low-voltage warning.
The SERVOPACK stops limiting the torque in the set time (Pn425) when the low-voltage warning is cleared.
Main circuit power interruption time
Main circuit
input supply
Main circuit
bus voltage
Low-voltage
warning detected
Torque limit
reference
280 V
*1
200 V
*2
Low-voltage
warning
Torque limit
SERVOPACK
Host
controller
Torque limit starts.
0%
0%
Torque limit ends.
Setting value for Pn425
Setting value for Pn424
Main circuit bus voltage
increases by recovery
of the main circuit power.
The bus voltage drops slowly because
output torque is limited.
The torque is limited in
response to a low-
voltage warning.
*1 560 V for 400 V power supply.
*2 400 V for 400 V power supply.
280 V
*1
200 V
*2
0%
Main circuit power interruption time
Main circuit
input supply
Main circuit
bus voltage
Low-voltage
warning detected
Torque limit starts.
Setting value for Pn424
Setting value for Pn425
Torque limit
SERVOPACK
Main circuit bus voltage
increases by recovery
of the main circuit power.
The bus voltage drops slowly because
output torque is limited.
*1 560 V for 400 V power supply.
*2 400 V for 400 V power supply.