SMC Networks LECSB2-T Series User Manual

4. STARTUP
4 - 6
4.2 Startup in position control mode
Make a startup in accordance with section 4.1. This section provides the methods specific to the position
control mode.
4.2.1 Power on and off procedures
(1) Power-on
Switch power on in the following procedure. Always follow this procedure at power-on.
1) Switch off SON (Servo-on).
2) Make sure that a command pulse train is not input.
3) Switch on the main circuit power supply and control circuit power supply.
When main circuit power/control circuit power is switched on, the display shows "C (Cumulative
feedback pulses)", and in 2 s later, shows data.
In the absolute position detection system, first power-on results in [AL. 25 Absolute position
erased] and the servo system cannot be switched on. The alarm can be deactivated by then
switching power off once and on again.
Also, if power is switched on at the servo motor speed of 3000 r/min or higher, position mismatch
may occur due to external force or the like. Power must therefore be switched on when the servo
motor is at a stop.
(2) Power-off
1) Make sure that a command pulse train is not input.
2) Switch off SON (Servo-on).
3) Switch off the main circuit power supply and control circuit power supply.
4.2.2 Stop
Turn off SON (Servo-on) after the servo motor has stopped, and then switch the power off.
If any of the following situations occurs, the driver suspends the running of the servo motor and brings it to a
stop. Refer to section 3.10 for the servo motor with an electromagnetic lock.
Operation/command
Stopping condition
Switch of SON (Servo-on).
The base circuit is shut off and the servo motor coasts.
Alarm occurrence
The servo motor decelerates to a stop with the command. With some alarms,
however, the dynamic lock operates to bring the servo motor to a stop. (Refer to
chapter 8.)
EM2 (Forced stop 2) off
The servo motor decelerates to a stop with the command. [AL. E6 Servo forced stop
warning] occurs. EM2 has the same function as EM1 in the torque control mode.
Refer to section 3.5 for EM1.
STO (STO1, STO2) off
The base circuit is shut off and the dynamic lock operates to bring the servo motor to
a stop.
LSP (Forward rotation stroke end) of LSN
(Reverse rotation stroke end) off
It will bring the motor to a sudden stop and make it servo-locked. It can be run in the
opposite direction.

SMC Networks LECSB2-T Series Specifications

General

Brand	SMC Networks
Model	LECSB2-T Series
Category	DC Drives
Language	English