13 . Real Time Calendar Time Design Examples 13.3 HOUR - Control of Switching Motors after a Long Time Running Control Purpose: z Controlling the automatic motor switching between main motor and auxiliary motor. In some special applications, we use several motors running by turns to protect each motor and extend their service life. In this program, there are 2 motors running by turns in the cycle: 2 days (48 hours) for the main motor, then 1 day (24 hours) for the auxiliary motor. Devices: Control Program: X0 M0 hen current running time M10 When M10 = ON, SET M0 instruction will be executed for stopping the main motor and starting the auxiliary motor.
Clear the current running time of the main motor Reset M10 DVP-PLC Application Examples 13-6 Device Function X0 Start/Stop of the motor Y0 Starting the main motor Y1 Starting the auxiliary motor M10 M10 = ON when set time of the main motor reached M11 M11 = ON when set time of the auxiliary motor reached D0~D1 Storing the current running time of the main motor D2~D3 Storing the current running time of the auxiliary motor HOUR K48 D0 M10 When X0 = ON, M0 = OFF, the timer st Set value: 48 hr. D0~D1 store the curr of main motor. M10 will be ON when c reaches the set value.. Y0 When X0 = ON, M0 = OFF, ON and the main motor will M0 HOUR K24 D2 M11 When X0 = ON, M0 = ON, the timer sta Set value:
24 hr. D2~D3 store the curr of main motor. M10 will be ON when c reaches the set value. When X0 = ON and M0 = ON Y1 ON and the auxiliary motor HOUR K48 D0 M10 HOUR K24 D2 M11 SET M0 ZRST D0 D1 RST M10