3 Wiring and Connections
37 SD780 Series Servo Technical Manual
3.8 Digital Input Signal
3.8.1 Input Signal Descriptions
Control
mode
Signal name
Pin No.
Function number and description
Common
/S-ON
Allocated
signal
(38
～
46)
0x01
Servo ON/OFF: Turns ON/OFF the servo
motor
POT
0x02
Forward limit, With over-travel prevention:
Stops servomotor when movable part
travels beyond the allowable range of
motion (Over-travel prevention function)
NOT
0x03
Reverse limit, stop the drive of the servo
motor When the mechanical movement
exceeds the movable range (over-travel
prevention function)
/ALM-RST
0x04
Alarm reset
/P-CON
0x05
Switches the speed control loop from PI
(proportional/integral) to P (proportional)
control when the P action command signal
is ON
/TLC
0x06
Torque limit switching used when torque
limit need to change during operation
/SPD-D
0x08
Used to change the motor control
direction at internal speed
/SPD-A
0x09
Use to select segment internal speed
instruction, when running in internal speed
mode
/SPD-B
0x0A
/C-SEL
0x0B
Control mode switching, used as
switching control mode when the control
mode is mixed mode
/ZCLAMP
0x0C
Zero fixed signal, used in speed mode as
zero fixed
/INHIBIT
0x0D
Pulse input prohibition, used as disable
pulse input count in position mode
/G-SEL
0x0E
Gain switching, gain switching to manual
gain switching when used as a switching
gain
/PSEL
0x10
Command pulse input rate switch, when in
position mode, it is used to switch pulse
input rate signal
+24VIN
47
Use when the sequence signal is input with the
control power supply
Operating voltage range: +11V
～
+25V (please
provide your own +24V power supply)
SEN
4
Initial data request signal when using an absolute
encoder
