9 Operation
9.6.3 Setting the Overtravel Limit Function
9-32
9.6.3 Setting the Overtravel Limit Function
The overtravel limit function forces movable machine parts to stop if they exceed the allowable range of motion
and turn ON a limit switch.
(1) Connecting the Overtravel Signal
To use the overtravel function, connect the following overtravel limit switch input signal terminals.
(2) Enabling/Disabling the Overtravel Signal
A parameter can be set to disable the overtravel signal. If the parameter is set, there is no need to wire the
overtravel input signal.
Type
Name
Connector Pin
Number
Setting
Meaning
Input
P-OT
CN1-42
(Factory setting)
ON (low level)
Forward run allowed. Normal operation status.
OFF (high level)
Forward run prohibited. Forward overtravel.
Input
N-OT
CN1-43
(Factory setting)
ON (low level)
Reverse run allowed. Normal operation status.
OFF (high level)
Reverse run prohibited. Reverse overtravel.
Connect limit switches as shown below to prevent damage to the devices dur-
ing linear motion.
Movement in the opposite direction is possible during overtravel. For example,
reverse run is possible during forward overtravel
IMPORTANT
When the linear servomotor stops due to overtravel during position control, the position error pulses are held. A clear sig-
nal
(CLR) input is required to clear the error pulses.
Limit
switch
Linear servomotor
SERVOPACK
42
CN1
43
N-OT
P-OT
Limit
switch
Forward
Parameter
Meaning
Pn50A
n.
2
Inputs the Forward Run Prohibited (P-OT) signal from CN1-42. (Factory setting)
n.
8
Disables the Forward Run Prohibited (P-OT) signal. (Allows constant forward run.)
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 run.)
• Applicable control methods: Speed control, position control, and force control
• After changing these parameters, turn OFF the main circuit and control power supplies and then turn them ON again to
enable the new settings.
* A parameter can be used to re-allocate input connector number for the P-OT and N-OT signals. Refer to
8.3.2 Input Cir-
cuit Signal Allocation
.
Summary of Contents for SGLFW
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