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SD710 Series Servo Drive User Manual Chapter 5 Commissioning and Operation
8
Servo ON
Motor power
on state
Braking
output
Motor power
off
Motor power
on
ON
OFF
ON
OFF
/S- ON
/Bk
Pn009
Motor
speed
Pn010
Figure 5.7 Timing diagram of the motor running with/BK signal OFF
Note
●
There may be slight differences in holding and release times depending on the brake model.
●
Ensure that the input command is after the brake opening action time to ensure the accuracy
of the command.
●
When the motor is locked to prevent possible danger caused by motor action when the servo
is OFF, the motor lock time (Pn008) can be set to ensure that the motor does not operate during
the holding process.
5.1.7 Overtravel Settings
The overtravel prevention function of the servo unit is a safety function that forces the servo motor to stop by inputting a
limit switch signal when the movable part of the machine exceeds the moveable area.
The overtravel signals include the prohibit forward side input (P-OT) signal and the prohibit reverse side input (N-OT)
signal. The P-OT and N-OT signals are installed at a specific position of the mechanical load, and the mechanical load
is stopped by the P-OT and N-OT signals when the mechanical load is out of the range of that specific position.
(1) Use of External Overtravel Signals
Switching signals using external limit switches.
Setting
Symbol
Functional name
Instructions
Trigger
method
Running
mode
0x02
P-OT
Prohibit forward
drive
When
the
mechanical
movement
exceeds
the
moveable range, the overtravel
prevention function is entered.
ON-Disable forward drive
OFF-Allows forward drive
Voltage
level
trigger
□
P
□
S
□
T
0x03
N-OT
Prohibit reverse
drive
When
the
mechanical
movement
exceeds
the
moveable range, the overtravel
prevention function is entered.
ON - Disable reverse drive
OFF - Allows reverse drive
Voltage
level
trigger
□
P
□
S
□
T
To use the overtravel function, connect the input signal of the overtravel limit switch to the pre-assigned input terminal
correctly. In the case of linear drive (screw), be sure to connect the limit switch as shown in the following diagram to
prevent damage to the machine. For the wiring diagram of the input signal, refer to
"Multi-function CN1 terminal wiring".
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