YASKAWA E-V Series User Manual page 82

Stopping Method for Servomotor for Gr.2 Alarms (Alarms that Result in a Zero-speed Stop)
Parameter
Pn00B Pn001
n. 0
[Factory setting]
n. 0
n. 1
[Factory
setting]
n. 2
n. 0
[Factory setting] Stops by
n. 1
n. 1
n. 2
Note: The setting of Pn00B.1 is effective for position control and speed control. Pn00B.1 will be ignored for force control
and only the setting of Pn001.0 will be valid.
<Terms>
Dynamic brake (DB)
A common method for quickly stopping a servomotor. The servomotor is
stopped by short-circuiting the servomotor circuit. This circuit is built into the
SERVOPACK.
Mode After
Stop Mode
Stopping
Dynamic
Brake
Zero-speed
stopping
Coast
Dynamic
Brake
dynamic
brake
Coast
Coast to stop
• Dynamic braking (DB) is used for emergency stops. The DB circuit will operate fre-
quently if the power is turned ON and OFF with a reference input applied, which may
result in deterioration of the internal elements in the SERVOPACK.
Use speed input references or position references to start and stop the servomotor.
• The SERVOPACK is forced to stop by dynamic braking despite the above parameter
settings when the main circuit power supply (L1, L2, L3) or control power supply (L1C,
L2C) turns OFF.
• If the servomotor must be stopped by coasting rather than by dynamic braking when
the main circuit power supply (L1, L2, L3) or the control power supply (L1C, L2C)
turns OFF, arrange the sequence externally so the servomotor wiring (U, V, W) will be
interrupted.
• To minimize the coasting distance of the motor to come to a stop, 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 than the zero-speed stop-
ping method, however, depending on the application. Change the method to the DB
stopping method as required by the application.
For example, for a twin-drive coupling operation, machinery damage may result if a
zero-speed stop alarm occurs for one of the coupled shafts.
Meaning
Stops the servomotor by zero-speed stop,
then holds it in Dynamic Brake Mode.
Stops the servomotor by zero-speed stop,
then places it into Coast (power OFF)
Mode.
Stops the servomotor by zero-speed stop,
then places it into Coast (power OFF)
Mode.
Stops the servomotor by dynamic braking
(DB), then holds it in Dynamic Brake
Mode.
Stops the servomotor by dynamic braking
(DB), then places it into Coast (power
OFF) Mode.
Stops the servomotor by coasting, and
continues in Coast mode (power OFF).
4.3 Setting Common Basic Functions
When Classifica-
Enabled tion
After
Setup
restart
SERVOPACK Servomotor
4
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