Mitsubishi Electric MELSERVO-J4 Series Instruction Manual page 108

Device
Forward rotation stroke
end
Reverse rotation stroke
end
Proximity dog
Proportional control
Gain switching
Fully closed loop
selection
3 SIGNALS AND WIRING
106
3.5 Signal (device) explanations
Symbol Connect Function and application
or pin
No.
LSP CN3-2 To start the operation, turn on LSP and LSN. Turn it off to bring the servo motor to a slow stop
and make it servo-locked.
LSN CN3-12
Input device
LSP
1
0
1
0
*1 0: Off
1: On
Setting [Pr. PD01] as follows turns the signals on automatically (always connected) in the servo
amplifier.
[Pr. PD01]
_ 4 _ _
_ 8 _ _
_ C _ _
When LSP or LSN is turned off, [AL. 99 Stroke limit warning] occurs.
In the torque mode, this device cannot be used during normal operation. It can be used during
the magnetic pole detection in the linear servo motor control mode and the DD motor control
mode. Also, when the magnetic pole detection in the torque mode is completed, this signal will
be disabled.
DOG CN3-19 Turning off DOG will detect a proximity dog. The polarity for dog detection can be changed with
[Pr. PT29].
[Pr. PT29]
_ _ _ 0
_ _ _ 1

PC Turn PC on to switch the speed amplifier from the proportional integral type to the proportional
type.
If the servo motor at a stop is rotated even one pulse due to any external factor, it generates
torque to compensate for a position shift. When the servo motor shaft is to be locked
mechanically after positioning completion (stop), switching on the PC (Proportion control) upon
positioning completion will suppress the unnecessary torque generated to compensate for a
position shift.
When the shaft is to be locked for a long time, switch on the PC (Proportion control) at the same
time to make the torque less than the rated one.
Do not use PC (Proportional control) in the torque mode. When PC (Proportional control) is
used in the torque mode, operation may be performed at a speed exceeding the speed limit
value.

CDP Turn on CDP to use the values of [Pr. PB29] to [Pr. PB36] and [Pr. PB56] to [Pr. PB60] as the
load to motor inertia ratio and gain values.

CLD This is used when the semi closed loop control/fully closed loop control switching is enabled
with [Pr. PE01].
Turn off CLD to select the semi closed loop control, and turn on CLD to select the fully closed
loop control.
This is used with servo amplifiers with software version A1 or later.
*1 Operation
LSN CCW direction
Positive direction
1 
1

0 
0

Status
LSP
Automatic on

Automatic on
Polarity for proximity dog detection
Detection with off
Detection with on
I/O
division
DI-1
CW direction
Negative
direction




LSN

Automatic on
Automatic on
DI-1
DI-1
DI-1
DI-1