3 . Timer Design Examples Control Program: X0 X1 Y0 Y0 Y0 T0 Y2 Y1 Y1 T0 T1 Y1 X1 Y2 Y2 Program Description: z X0 = ON when START is pressed. Y0 will be ON and latched. The motor starting contactor KM0 will be ON and the timer T0 will start to count for 10 sec. At the same time, because Y0 = ON, T0 = OFF and Y2 = OFF, Y1 will be ON. The “Star Reduced Voltage Starter ” contactor KM1 will be activated. z When timer T0 reaches its set value, T0 will be ON and Y1 will be OFF. Timer T1 will start to count for 1 sec. After 1 sec, T1 = ON and Y2 = ON. “Delta Reduced Voltage Starter” contactor KM2 will be activated. z X1 = ON when STOP is pressed.
Y0, Y1 and Y2 will be OFF and the motor will stop running no matter it is in starting mode or running mode. DVP-PLC Application Examples 3-12 TMR T0 K100 TMR T1 K10