YASKAWA SGDV series User Manual page 103

(2) Overtravel Function Setting
Parameters Pn50A and Pn50B can be set to enable or disable the overtravel function.
If the overtravel function is not used, no wiring for overtravel input signals will be required.
Parameter
n.2
[Factory setting]
Pn50A
n.8
n.
3
[Factory setting]
Pn50B
n. 8
A parameter can be used to re-allocate input connector number for the P-OT and N-OT signals. Refer to 3.4.1
Input Signal Allocations for details.
Note: The factory settings of these parameters in a large-capacity Σ-V SERVOPACK are not all the same as those for a
standard Σ-V SERVOPACK.
Make sure that you consider any differences in the factory settings if you copy the parameters from a standard Σ-V
SERVOPACK to a large-capacity Σ-V SERVOPACK.
(3) Servomotor Stopping Method When Overtravel is Used
There are three servomotor stopping methods when an overtravel is used.
• Dynamic brake
By short-circuiting the electric circuits, the servomotor comes to a quick stop.
• Decelerate to a stop
Stops by using emergency stop torque.
• Coast to a stop
Stops naturally, with no control, by using the friction resistance of the servomotor in operation.
After servomotor stopping, there are two modes.
• Coast mode
Stopped naturally, with no control, by using the friction resistance of the servomotor in operation.
• Zero clamp mode
A mode forms a position loop by using the position reference zero.
The servomotor stopping method when an overtravel (P-OT, N-OT) signal is input while the servomotor is
operating can be set with parameter Pn001.
Parameter
n. 00
[Factory setting]
*
n. 01
Pn001
n. 02
n. 1
n. 2
∗
Always connect a dynamic brake circuit for these settings.
• A servomotor under torque control cannot be decelerated to a stop. The servomotor is stopped with the
dynamic braking (DB) or coasts to a stop according to the setting of Pn001.0. After the servomotor stops,
the servomotor will enter a coast state.
• For details on servomotor stopping methods after the Servo ON command is turned OFF or an alarm occurs,
refer to 4.2.8 Stopping Servomotors after Turning OFF Servo ON Command or Alarm Occurrence.
Meaning
Inputs the Forward Run Prohibited (P-OT) signal from
CN1-42.
Disables the Forward Run Prohibited (P-OT) signal.
Allows constant forward rotation.
Inputs the Reverse Run Prohibited (N-OT) signal from
CN1-43.
Disables the Reverse Run Prohibited (N-OT) signal.
Allows constant reverse rotation.
Stop Method
DB
DB
Coast
Coast
Zero clamp
Deceleration to a stop
Coast
4.2 Basic Functions Settings
When
Enabled
After restart
Mode After
When Enabled Classification
Stopping
After restart
Classification
Setup
4
Setup
4-7