Motor Stopping Method Meaning
Stopping by Applying the Dynamic Brake The electric circuits are internally con-
nected to stop the Servomotor quickly.
Coasting to a Stop The motor stops naturally due to friction
during operation.
Zero-speed Stopping The speed reference is set to 0 to stop the
Servomotor quickly.
Decelerating to a Stop Emergency stop torque is used to decel-
erate the motor to a stop.
There are the following three conditions after stopping.
Status after Stopping Meaning
Dynamic Brake Applied The electric circuits are internally con-
nected to hold the Servomotor.
Coasting The SERVOPACK does not control the
Servomotor. (The machine will move in
response to a force from the load.)
Zero Clamping A position loop is created and the Servo-
motor remains stopped at a position refer-
ence of 0. (The current stop position is
held.)
– The dynamic brake is used for emergency stops. The dynamic brake
circuit will operate frequently if the power supply is turned ON and
OFF or the servo is turned ON and OFF while a reference input is
applied to start and stop the Servomotor. This may result in deteriora-
tion of the internal elements in the SERVOPACK. Use speed input
references or position references to start and stop the Servomotor.
– If you turn OFF the main circuit power supply or control power supply
during operation before you turn OFF the servo, the Servomotor stop-
ping method depends on the SERVOPACK model as shown in the
following table.
Servomotor Stopping Method
Condition Servomotor Stopping Method
SGD7S-R70A, -1R6A,
-2R8A, -3R8A, -5R5A,
-7R6A, -120A, -180A,
-200A, -R70F, -R90F,
-2R1F, or -2R8F
SGD7S-330A, -470A,
-550A, -590A, or -780A
Main circuit power supply
turned OFF before turning
OFF the servo
Stopping with dynamic brake
Control power supply
turned OFF before turning
OFF the servo
Stopping with dynamic
brake
Coasting to a stop
Sigma-7 Series SERVOPACKs
Basic Functions That Require Setting before Operation
Motor Stopping Methods for Servo OFF and Alarms > Overview
| | PROFINET Communications - SIEP YEUOC7P 02A Revision 0 | en | 173
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