YASKAWA SGMJV - Page 114

5.2 Setting Common Basic Functions
5-7
5
Operation
(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.
• 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.
(3) Motor Stopping Method When Overtravel is Used
There are three motor stopping methods when an overtravel is used.
• Dynamic brake
By short-circuiting the electric circuits, the servomotor comes to a quick stop.
• Decelerate to stop
Stops by using deceleration (braking) torque.
• Coast to a stop
Stops naturally, with no control, by using the friction resistance of the motor in operation.
After stopping, there are two modes.
• Coast mode
Stopped naturally, with no control, by using the friction resistance of the motor in operation.
• Zero clamp mode
A mode forms a position loop by using the position reference zero.
The stopping method when an overtravel (P-OT, N-OT) signal is input while the servomotor is operating can
be set with parameter Pn001.
Parameter Meaning When Enabled Classification
Pn50A
n.2

Inputs the Forward Run Prohibited (P-OT) signal from
CN1-42.
[Factory setting]
After restart Setup
n.8

Disables the Forward Run Prohibited (P-OT) signal.
Allows constant forward rotation.
Pn50B
n.
3
Inputs the Reverse Run Prohibited (N-OT) signal from
CN1-43.
[Factory setting]
n.
8
Disables the Reverse Run Prohibited (N-OT) signal.
Allows constant reverse rotation.
Parameter Stop Mode
Mode
After
Stopping
Meaning When Enabled Classification
Pn001
n.00
Stop by
dynamic
brake
Coast
Immediately stops the ser-
vomotor by dynamic brak-
ing (DB), then places it into
Coast Mode.
After restart Setup
n.01
n.02
Coast to a
stop
Stops the servomotor by
coast stop, then places it
into Coast Mode.
n.1
Decelerate
to stop
Zero
Clamp
Decelerates the servomotor
with emergency stop torque
(Pn406), then places it into
Zero Clamp (Servolock)
Mode.
n.2 Coast
Decelerates the servomotor
with emergency stop torque
(Pn406), then places it into
Coast Mode.