Question

use what you have learned to design a small PLC system that controls the East Garage Entrances, Exits and parking capacity. For this problem submit what sensors you need (type, power-requirement, digital outputs and digital inputs needed for the PLC), your PLC hardware selection and your hand written ladder code controling Entrances, Exits and parking capacity. (Submit Boolean Logic and Ladder Code). Assume the East Parking Garage has a max capacity of 150 cars and that the only users that can enter and exit the garage are those with valid CSU IDs. Also note the parking attendant vehicles must be allowed entrance at all time even when the garage is full however anyone else with a valid CSU ID cannot enter the East Garage when it is full.

Answer 1

To design a small PLC system for controlling the East Garage Entrances, Exits, and parking capacity, we need sensors such as RFID card readers for entrances and exits, and a proximity sensor for monitoring the parking capacity. The PLC hardware should have digital inputs and outputs, and can be powered by an appropriate power supply. The ladder code can use boolean logic to control the entrances, exits, and parking capacity, taking into account valid CSU IDs and special rules for parking attendant vehicles.

Step-by-step explanation:

Designing a Small PLC System for East Garage Control

To design a small PLC system that controls the East Garage Entrances, Exits, and parking capacity, we will need the following sensors:

1. Sensor for Entrance: This could be a RFID card reader sensor that detects valid CSU IDs.

2. Sensor for Exit: Similar to the entrance sensor, we will need a RFID card reader sensor to detect valid CSU IDs.

3. Parking Capacity Sensor: This could be a proximity sensor that counts the number of cars in the garage.

For the PLC hardware, we can use a compact PLC with digital inputs and outputs, powered by an appropriate power supply.

Here is an example of ladder code controlling the entrances, exits, and parking capacity:

1. Initialize the parking capacity counter to 0.
2. Read the entrance sensor. If a valid CSU ID is detected, increment the parking capacity counter if the garage is not full.
3. Read the exit sensor. If a valid CSU ID is detected, decrement the parking capacity counter if it is not already zero.
4. Keep a separate counter for parking attendant vehicles. Whenever a parking attendant vehicle is detected at the entrance sensor, allow entry regardless of the parking capacity.
5. In the ladder code, add logic to ensure that valid CSU IDs cannot enter the East Garage when it is full.

Using boolean logic and ladder code, we can create a small PLC system that controls the East Garage Entrances, Exits, and parking capacity.