4.2 Basic Functions Settings4-194 Operation4.2.8 Stopping Servomotors after Turning OFF Servo ON Command or AlarmOccurrenceThe servomotor stopping method can be selected after the Servo ON command is turned OFF or an alarmoccurs.(1) Stopping Method for Servomotor after Servo ON Command is Turned OFFUse Pn001.0 to select the stopping method for the servomotor after the Servo ON command is turned OFF.∗ Always connect a dynamic brake circuit for these settings.Note: Similar to the Coast Mode, the n.0 setting (which stops the servomotor by dynamic braking and then holds itin Dynamic Brake Mode) does not generate any braking force when the servomotor stops or when it rotates at verylow speed.(2) Stopping Method for Servomotor When an Alarm OccursThere are two types of alarms (Gr.1 and Gr.2) that depend on the stopping method when an alarm occurs.Select the stopping method for the servomotor when an alarm occurs using Pn001.0 and Pn00B.1.The stopping method for the servomotor for a Gr.1 alarm is set to Pn001.0.The stopping method for the servomotor for a Gr.2 alarm is set to Pn00B.1.Refer to the information on alarm stopping methods in 9.1.1 List of Alarms.• Dynamic braking (DB) is used for emergency stops. The DB circuit will operate fre-quently if the power is turned ON and OFF or the Servo ON command is turned ONand OFF with a reference input applied to start and stop the servomotor, which mayresult in deterioration of the internal elements in the SERVOPACK and converter.Use speed input references or position references to start and stop the servomotor.• If you turn OFF the control power supply during operation without turning OFF theservo, the servomotor will coast to a stop. In this case, you cannot set the stopmethod in a parameter.• To minimize the coasting distance of the servomotor to come to a stop when an alarmoccurs, the zero-speed stopping method is factory-set for alarms to which the zero-speed stop method is applicable. The DB stopping method may be more suitable thanthe zero-speed stopping method, however, depending on the application.For example, for multiple axes coupling operation (a twin-drive operation), machinerydamage may result if a zero-speed stop alarm occurs for one of the coupled shaftsand the other shaft stops by dynamic brake. In such cases, change the method to theDB stopping method.Parameter Stop Mode Mode After Stopping When Enabled ClassificationPn001n.0*[Factory setting] DB DBAfter restart Setupn.1* Coastn.2 Coast Coast
