Yaskawa Sigma-5 User Manual: Design and Maintenance - Linear Motors - Manual (Page 97)

4.2 Settings for Common Basic Functions
4-7
4
Operation
(3) 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.
(4) Motor Stopping Method When Overtravel is Used
There are three linear servomotor stopping methods when an overtravel is used.
• Stop by dynamic brake
By short-circuiting the electric circuits, the linear servomotor comes to a quick stop.
• Decelerate to stop
Stops by using deceleration (braking) force.
• Coast to a stop
Stops naturally, with no control, by using the friction resistance of the linear servomotor in operation.
After stopping, there are two modes.
• Coast mode
Stopped naturally, with no control, by using the friction resistance of the linear servomotor 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 linear servomotor is operat-
ing can be set with parameter Pn001.
Parameter Meaning When Enabled Classification
Pn50A
n.1†††
Inputs the Forward Run Prohibited (P-OT) signal from
CN1-7.
[Factory setting]
After restart Setup
n.8†††
Disables the Forward Run Prohibited (P-OT) signal.
Allows constant forward movement.
Pn50B
n.†††2
Inputs the Reverse Run Prohibited (N-OT) signal from
CN1-8.
[Factory setting]
n.†††8
Disables the Reverse Run Prohibited (N-OT) signal.
Allows constant reverse movement.
Parameter Stop Mode
Mode
After
Stopping
Meaning When Enabled Classification
Pn001
n.††00
Stop by
dynamic
brake
Coast
Immediately stops the lin-
ear servomotor by dynamic
braking (DB), then places it
into Coast Mode.
After restart Setup
n.††01
n.††02
Coast to a
stop
Stops the linear servomotor
by coast stop, then places it
into Coast Mode.
n.††1†
Decelerate
to stop
Zero
Clamp
Decelerates the linear ser-
vomotor with emergency
stop force (Pn406), then
places it into Zero Clamp
(Servolock) Mode.
n.††2† Coast
Decelerates the linear ser-
vomotor with emergency
stop force (Pn406), then
places it into Coast Mode.