YASKAWA SGDV User Manual page 87

(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 3.3.1
Input Signal Allocations for details.
(3) Servomotor Stopping Method When Overtravel is Used
There are two servomotor stopping methods when an overtravel is used.
• 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. 02
[Factory setting]
Pn001
n. 1
n. 2
• A servomotor under torque control cannot be decelerated to a stop. Coast status is maintained after the ser-
vomotor coasts to a stop.
• For details on servomotor stopping methods after the /S-ON (Servo ON) signal turns OFF or an alarm
occurs, refer to 5.2.5 Stopping Servomotors after /S-ON Turned OFF or Alarm Occurrence.
When Servomotor Stopping Method is Set to Decelerate to Stop
Emergency stop torque can be set with Pn406.
Emergency Stop Torque
Pn406
Setting Range
0 to 800
• The setting unit is a percentage of the rated torque.
• The factory setting is 800% so that the setting is large enough a value to operate the servomotor at maximum
torque. The maximum value of emergency stop torque that is actually available, however, is limited to the
maximum torque of the servomotor.
Meaning
Inputs the Forward Run Prohibited (P-OT) signal from
CN1-17.
Disables the Forward Run Prohibited (P-OT) signal.
Allows constant forward rotation.
Inputs the Reverse Run Prohibited (N-OT) signal from
CN1-18.
Disables the Reverse Run Prohibited (N-OT) signal.
Allows constant reverse rotation.
Stop Method
Coast Coast
Zero clamp
Deceleration to a stop
Coast
Setting Unit Factory Setting
1%
5.2 Basic Functions Settings
When
Enabled
After restart
Mode After
When Enabled Classification
Stopping
After restart
Speed Position Torque
When Enabled
800 Immediately
Classification
Setup
Setup
5
Classification
Setup
5-7