#PLC Programming PLC is used to operate a parking garage door. A ladder logic pr
ID: 2266709 • Letter: #
Question
#PLC Programming
PLC is used to operate a parking garage door. A ladder logic program for parking garage automatic control is designed but necessary labels are missing. Name (i.e. define each action such "Gate Obstructed") the functions/commands on each rung based on the following operation of parking garage door;
1- The driver approaches an automated ticket machine at a parking lot gate.
2- The driver pushes a button on the ticket machine to receive a ticket. The machine does not provide a ticket if the lot is full or the gate is up.
3- Removing the ticket raises the gate and turns on a green light to signal the driver to enter.
4- After the car clears the gate, the gate lowers and the green light shuts off.
5- The vehicle population is known at any time.
6- An alarm sounds when the gate is obstructed.
Note: Although it is advised that you use the ladder logic layout provided to you below, if you can not figure it out using the provided layout, you can design a new layout and name the functions to accomplish the same outcome based on the description of operation provided above.
000- E 002 HE Counter Counter 004 JE 005 006 (END)Explanation / Answer
002 is for 1- The driver approaches an automated ticket machine at a parking lot gate. when driver approaches the gate the distance sensor will give high so that the output will high.
000 is for 2 - The driver pushes a button on the ticket machine to receive a ticket. The machine does not provide a ticket if the lot is full or the gate is up. no contact is push button and one no contact is for lot is full and another one parallel to it is gate is up position (any of these two conditions will fulfil then the output didnot high).
003 is for 5- The vehicle population is known at any time.
001 is for 3- Removing the ticket raises the gate and turns on a green light to signal the driver to enter.
005 is for 4- After the car clears the gate, the gate lowers and the green light shuts off.
004 is for 6- An alarm sounds when the gate is obstructed.
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