Chapter 3. Wiring and Signals
3-7
3.1.2 Turning ON/Off of power supply
As the main circuit of the servo drive is designed in condenser input type, high charging current
(charging time approximately 03-0.5 seconds) flows when main power is connected. If the main
power supply is turned ON/OFF frequently, the main circuit element may be deteriorated leading to
an error. Use SVONEN (CN1-15) terminal and Stop (CN1-38) terminal to start or stop the motor.
(Caution!)
1) It takes approximately 1-2 seconds before Alarm signal is activated after power is connected.
Press power switch for at least 2 seconds or longer.
2) If the main power is connected immediately after power is shut off, Power Fail (AL-04) alarm may
occur. Connect power at least 10 seconds after the power is turned off.
3) The above wiring diagram shows that only the main power is turned off when alarm occurs and
you can check the details of the alarm.
3.1.3 Timing diagram at the time of power connection
Power is supplied to the control circuit, if single-phase power is connected to the r and t terminals.
Servo becomes RDY after maximum 3s, the time required to initialize the inside of the drive system;
and if the servo drive signal is turned on, operation starts 25 ms later.
50ms
Max. 3s
300ms
Power Good
SVON
DB reset
PWM
(Motor rotation)
Alarm
Nomal ON
Servo RDY
100ms
25ms
1ms
Max. 1s
Control powerset
(5V)
Control program
initialization
Single & 3-Phase power
(r,t) & (R,S,T)
