YASKAWA Sigma-V Series User Manual page 101

4 Operation
4.3.2 Overtravel
(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.
Pn50A
Pn50B
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.
(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.
Pn001
∗
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 SV_OFF command is received or an alarm occurs,
refer to 4.3.5 Stopping Servomotors after SV_OFF Command or Alarm Occurrence.
4-10
Parameter
n.2 Inputs the Forward Run Prohibited (P-OT) signal from
[Factory setting] CN1-42.
Disables the Forward Run Prohibited (P-OT) signal.
n.8
Allows constant forward rotation.
n.3 Inputs the Reverse Run Prohibited (N-OT) signal from
[Factory setting] CN1-43.
Disables the Reverse Run Prohibited (N-OT) signal.
n.8
Allows constant reverse rotation.
Parameter
n.00
[Factory setting]
DB
*
n.01
n.02 Coast
n.1
Deceleration to a stop
n.2
Meaning
Mode After
Stop Method
Stopping
DB
Coast
Zero clamp
Coast
When
Classification
Enabled
After restart Setup
When Enabled Classification
After restart Setup