This document presents a project to design a water control system for an amusement park ride using a programmable logic controller (PLC). The project is being conducted through an internship program in association with Mitsubishi Electric. The water ride involves detecting carts, filling and emptying a water tank using solenoid valves, and triggering a water jet. The PLC will sense the ride status and control the inlet and outlet valves to automate the water flow process.

1. A PROJECT ON AMUSEMENT PARK
WATER CONTROL SYSTEM
Presented by-
• Prashant Shekhar (23001611026)
• Soumaanil Sen (23001611042)

2. PROJECT UNDER
INTERNATIONAL INSTITUTE FOR ADVANCED TRAINING ON CONTROL AND
AUTOMATION(IIATCA)
DA-169,SALT LAKE, KOLKATA
IN ASSOCIATION WITH
MITSUBISHI ELECTRIC
DURATION-09/07/2014 to 09/08/2014

3. 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.

4. 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

5. 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

6. PROJECT OVERVIEW
A 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.

8. •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.

9. CONTROL PHILOSOPHY- FLOW CHART