How to Create Controller Tags and Three-Wire Control Logic for a Conveyor Motor

Controller Tags for Devices:

A) N/C Emergency Stop push button: E_STOP

B) N/O Start push button: START

C) Green pilot light: GREEN_LIGHT

D) Red pilot light: RED_LIGHT

E) Yellow pilot light: YELLOW_LIGHT

F) A5 second on delay timer: ON_DELAY_TIMER

G) A5 second off delay timer: OFF_DELAY_TIMER

H) Production part count (max 5000): PART_COUNT

Three-Wire Control Logic for Conveyor Motor:

The logic for controlling a conveyor motor with three-wire control involves ensuring the motor runs smoothly and indicators are activated correctly.

Here is how you can create the logic:

Power Flow Rung:

The motor will be energized when either the start button is pressed or the on-delay timer is timing.

Rung 1:

- Checks if the motor is enabled but not running.

- When true, the yellow light will be on.

- When false, the yellow light will be off.

- Flashing the yellow light every half second is achieved by using a flashing bit and a timer.

- The timer is triggered by the motor enable signal and flashes the bit every half second.

- When the timer finishes timing, the flashing bit will alternate between true and false, causing the yellow light to flash.

- The yellow light will stop flashing when the motor starts running.

Rung 2:

- Checks if the motor is stopped or the stop button is pressed.

- When true, the red light will be on.

- When false, the red light will be off.

Rung 3:

- Checks if the start button is pressed and the motor is not running.

- When true, the on-delay timer will be triggered.

- The timer will time for 5 seconds before activating the motor.

Rung 4:

- Checks if the motor is running.

- When true, the green light will be on.

- When false, the green light will be off.

End of Logic:

This logic ensures smooth operation of the conveyor motor with proper indicator lights for troubleshooting and monitoring.