YASKAWA SGDS Sigma III Series, User Manual

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7.6 Setting Stop Functions
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7.6 Setting Stop Functions
This section describes the procedure used to stop the SERVOPACK stably.
7.6.1 Using the Dynamic Brake
To stop the servomotor by applying the dynamic brake (DB)
1
, set the desired mode in the following parameter.
The servomotor will stop due to machine friction if the dynamic brake is not applied.
The SERVOPACK turns OFF under the following conditions:
• When the SV_OFF command is transmitted.
• A servo alarm occurs.
• Main circuit power is turned OFF.
Specify the Stop Mode if any of these occurs during operation.
* 1. If the servomotor is stopped or moving at extremely low speed, it will coast to a stop.
* 2. A dynamic brake is used when the control power and main power are turned OFF.
The dynamic brake is an emergency stop function. Do not repeatedly start and stop the servomotor using the
SV_ON/SV_OFF command or by repeatedly turning power ON and OFF.
1
Dynamic brake (DB)
The dynamic brake is a common way of suddenly stopping a servomotor. Built into
the SERVOPACK, the dynamic brake suddenly stops a servomotor by electrically
shorting its electrical circuit.
Pn001.0 Setting Description
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.
After the servomotor stops, the dynamic brake is activated 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 machine friction.
SERVOPACK Servomotor
SERVOPACK Servomotor
TERMS
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
IMPORTANT