6.12 Motor Stopping Methods for Servo OFF and Alarms
6.12.1 Stopping Method for Servo OFF
6-38
6.12.1
Stopping Method for Servo OFF
Set the stopping method for when the servo is turned OFF in Pn001 = n.
X (Servo OFF or
Alarm Group 1 Stopping Method).
To use the dynamic brake to stop the motor, set Pn001 to n.
0 or n.
1.
If you do not connect an external dynamic brake, set Pn001 to n.
2 (Coast the motor to a
stop without the dynamic brake).
*
The Servomotor will coast to a stop when the SERVOPACK is not equipped with a built-in Dynamic Brake Resistor
or an External Dynamic Brake Resistor is not connected.
Note: If Pn001 is set to n.
0 (Stop the motor by applying the dynamic brake) and the Servomotor is stopped or
operates at a low speed, braking force may not be generated, just like it is not generated for coasting to a
stop.
6.12.2
Servomotor Stopping Method for Alarms
There are two types of alarms, group 1 (Gr. 1) alarms and group 2 (Gr. 2) alarms. A different
parameter is used to set the stopping method for alarms for each alarm type.
Refer to the following section to see which alarms are in group 1 and which are in group 2.
Motor Stopping Method for Group 1 Alarms
When a group 1 alarm occurs, the Servomotor will stop according to the setting of Pn001 =
n.
X. The default setting is to stop by applying the dynamic brake.
Refer to the following section for details.
6.12.1 Stopping Method for Servo OFF
Motor Stopping Method for Group 2 Alarms
When a group 2 alarm occurs, the Servomotor will stop according to the settings of the follow-
ing three parameters. The default setting is for zero clamping.
•
Pn001 = n.
X (Servo OFF or Alarm Group 1 Stopping Method)
•
Pn00A = n.
X (Motor Stopping Method for Group 2 Alarms)
•
Pn00B = n.
X
(Motor Stopping Method for Group 2 Alarms)
However, during torque control, the group 1 stopping method is always used.
If you set Pn00B to n.
1
(Apply dynamic brake or coast Servomotor to a stop), you can
use the same stopping method as group 1. If you are coordinating a number of Servomotors,
you can use this stopping method to prevent machine damage that may result because of dif-
ferences in the stopping method.
The following table shows the combinations of the parameter settings and the resulting stop-
ping methods.
Parameter
Servomotor Stop-
ping Method
Status after Servo-
motor Stops
When Enabled
Classifi-
cation
Pn001
(2001h)
n.
0
(default setting)
Dynamic brake
*
Dynamic brake
*
After restart
Setup
n.
1
Coasting
n.
2
Coasting Coasting
When connecting an external dynamic brake circuit to SGD7S-210D, -260D, -280D, and -370D
SERVOPACKs, set the /DBANS (Dynamic Brake Answer Input) and /DBON (Dynamic Brake
Operation Request Output) signals regardless of the setting of Pn001 = n.
X. The A.F30
(Dynamic Brake Circuit Error) alarm will occur if the /DBANS and /DBON signals are not con-
nected to I/O signal terminals.
Important