Design & Simulation of a Cyclic Sequential Control System for Three Motors(Traffic sequence)

Objective:

Designed and simulated a comprehensive Classic Control circuit to operate three industrial motors in a specific, repetitive time sequence (Cyclic Operation), integrated with a centralized safety interlocking system.

Sequence of Operation:

The control logic was built using On-Delay Timers to automatically execute the following sequence upon pressing the 'Start' button:

Phase 1: Motor 1 runs independently for 3 seconds.

Phase 2: Motor 2 energizes and runs simultaneously with Motor 1 for 3 seconds.

Phase 3: Motors 1 and 2 are de-energized, while Motor 3 starts and runs for 3 seconds.

Phase 4: Motor 2 re-energizes to run simultaneously with Motor 3 for 3 seconds.

Continuous Loop: The system automatically resets and repeats the entire cycle continuously.

Integrated Safety & Protection (Interlocking):

To ensure the safety of the production line, the Thermal Overload (OL) contacts for all three motors are connected in series within the control circuit. If any single motor experiences an overload or fault, the power to the entire control circuit is immediately interrupted, safely shutting down the whole system to prevent mechanical or electrical damage.

Tools Used:

CADe_SIMU: Utilized for drafting the electrical schematics and performing live dynamic simulations to verify the timing accuracy and the reliability of the protection logic.