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2023-10-03
[ WEB PLC ] Triggering Alarm using DI0 to Activate DO0, Output Stops after n times of Cycle Output (Virtual Point Application)

Description:

This case demonstrates the application of cycle-based output using DI0 to trigger DO0. Additionally, a TIMER is utilized to control the output duration, shutting off the output after N seconds. This setup can be practically applied in parking lot lanes, where vehicle entry into the lane triggers an infrared sensor, activating a buzzer or relevant lights to indicate vehicle movement and ensure lane safety.

 

 

 

WEB Configuration Interface & Ladder Diagram: :

Ladder Diagram (Providing two configuration methods)

(1) Using Timer for Timing and Disabling Cycle Output  

Index 000: Set the trigger condition for virtual output M8 (Self-hold & TMR:000 < 81)

Index 001: Set the trigger condition for TMR:000 (M8 ON)

Index 002: Set the trigger condition for Y0 (X0 edge trigger)

Index 003: Set the close condition for Y0 (TMR:000 = 80)

  • X0/X1/.../Xn represent physical input points DIX0/DIX1/.../DIXn
  • Y0/Y1/.../Yn represent physical output points DOY0/DOY1/.../DOYn
  • M0/M1/.../Mn represent virtual output points DOM0/DOM1/.../DOMn

(2) Using Pulse for Timing and Disabling Cycle Output

Index 004: Set the trigger condition for virtual point M7 (X1 edge trigger), executing an 8-second output after trigger

Index 005: Set the trigger condition for physical point Y1 (X1 edge trigger), initiating cycle output after trigger

Index 006: Set the OFF condition for Y1 (M7 OFF)

  • X0/X1/.../Xn represent physical input points DIX0/DIX1/.../DIXn
  • Y0/Y1/.../Yn represent physical output points DOY0/DOY1/.../DOYn
  • M0/M1/.../Mn represent virtual output points DOM0/DOM1/.../DOMn

 

 

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