Yaskawa Sigma II Series Servo System - Manual (Page 149)

Sigma II User’s Manual Chapter 5: Parameter Settings and Functions
5-63
5.4.2 Servo OFF Stop Mode Selection
To stop the servomotor by applying the dynamic brake (DB), set the desired mode in
the following parameter. The servomotor will stop due to equipment friction if the
dynamic brake is not applied.
The SGDH servo amplifier turns OFF under the following conditions:
• The Servo ON input signal (/S-ON, CN1-40) is turned OFF.
• A servo alarm occurs.
• Power is turned OFF.
Specify the Stop Mode if any of these occurs during operation.
Note: *1. If the servomotor is stopped or moving at extremely low speed, it will coast to a stop.
*2. For the following servo amplifiers, the DB circuit is turned ON when the main power supply is
OFF:
30 to 200W for 100V:
SGDH-A3BE to -02BD
30 to 1500W for 200V: SGDH-A3AE to -15AE
0.5 to 7.5kW for 400V: SGDH-05DE to -75DE
For the above servo amplifiers, the DB Circuit is turned ON when the control power supply is OFF.
If the DB circuit needs to be turned OFF when the main power supply or the control power
supply is OFF, disconnect the servomotor wiring (U, V, and W).
Note: The dynamic brake is an emergency stop function. Do not repeatedly start and stop the servomo-
tor using the servo ON signal (/S-ON) or by repeatedly turning power ON and OFF.
Parameter Signal
Setting
(ms)
Description
Pn001.0 Servo OFF or Alarm Stop Mode Default Setting: 0
Speed/Torque Control,
Position Control
Pn001.0 Setting Result
0
Uses the dynamic brake to stop the servomotor.
Maintains dynamic brake after the servomotor stops.
*1
1
Uses the dynamic brake to stop the servomotor.
Releases dynamic brake after the servomotor stops, and the servomotor coasts to a stop.
2
Coasts the servomotor to a stop. 2)
The servomotor is turned OFF and motion stops due to equipment friction.
Stop mode After stopping
Coast to a
stop
Dynamic
brake stop
Hold dynamic brake
Coast status
0
1
Pn001.0 = 0
or 1
Servo
OFF
Pn001.0
= 2
Coast status
Servo amplifier Servomotor
Note: Dynamic brake (DB) is a common way of quickly stopping
a servomotor by electrically shorting its electrical windings.
The DB circuit is incorporated into the servo amplifier.