A PROJECT ON AMUSEMENT PARK WATER CONTROL SYSTEM

Presented by-• Prashant Shekhar (23001611026)• Soumaanil Sen (23001611042)

PROJECT UNDER

INTERNATIONAL INSTITUTE FOR ADVANCED TRAINING ON CONTROL AND AUTOMATION(IIATCA)DA-169,SALT LAKE, KOLKATA

IN ASSOCIATION WITH

MITSUBISHI ELECTRICDURATION-09/07/2014 to 09/08/2014

What is PLC? PLC stands for Programmable

Logic Controller. They were introduced in 1960’s. First they were developed to offer

the samefunctionality as existing relay logic system.

They can start in seconds and use ladder logic in programming. It uses a programmable memory to store instructions in and specific functions such as ON/OFF control, timing, counting, etc.

The Need for PLCs

• Hardwired panels were very time consuming to wire, debug and change. • GM identified the following requirements for computer controllers to replace hardwired panels. • Solid-state not mechanical •Easy to modify input and output devices •Easily programmed and maintained by plant electricians

Advantages of PLC• Flexible • Faster response time • Less and simpler wiring • Solid-state - no moving parts • Modular design - easy to repair and expand • Handles much more complicated systems • Sophisticated instruction sets available • Allows for diagnostics “easy to troubleshoot” • Less expensive

PROJECT OVERVIEWA PLC is to control the amusement park water ride. The ride is associated with a tank and a splash on a group.

The ride is sensed by “cart detect” limit switch. A water tank is associated and is sensed with two solenoid operated valves and corresponding level sensors as filling valve by “level full sensor” and outlet valve by “empty sensor”. The PLC has to sense the ride and

control the inlet and outlet valve.

•The process starts in idle.•The cart detect limit switch opens the filling valve.•After a delay of 30 seconds the outlet valve opens. •When the tank is full, outlet valve open. When the tank is empty, the outlet valve closes.•After a delay of 10 seconds from the opening of outlet valve a water jet opens.•After a delay of 2 seconds, the water jet closes and the process returns to the idle state.

CONTROL PHILOSOPHY- FLOW CHART