Multi-Level Parking Control Program in TIA Portal

This article discusses a multi-level parking control program using the Siemens TIA Portal. The PLC system is used to efficiently manage the vehicle parking process by providing real-time information on parking slot availability on each floor. Through indicator lights, drivers can easily identify which floor still has empty slots, making it easier to choose a parking location. The PLC system records every car entering and exiting to monitor the number of available slots. When the parking area is full, the system will automatically issue a warning and prevent additional vehicles from entering.

Contents

Program Objective

Multi-Level Parking Control Program in TIA Portal

Parking Process in the Automatic Parking System

Vehicle Detection
A sensor detects an incoming vehicle. The system immediately checks for available parking slots on each floor.
Parking Slot Monitoring
Each floor contains 10 parking slots and an individual exit gate. An exit sensor is installed on each floor to detect vehicles leaving the area.
Automatic Slot Update
When the exit sensor is triggered, the system automatically decreases the count of parked vehicles on that floor.
Parking Floor Selection
If multiple floors have available slots, the driver selects the desired floor. The system logs the selected floor and increments the vehicle count accordingly.
Gate Access Control
After the floor selection, the entry gate opens automatically for 10 seconds to allow the vehicle to enter.
Full Parking Indicator
If all parking slots are occupied, the system activates the “FULL” indicator to inform that no space is available.

IO Mapping in TIA Portal

S.No.	Comment	Input (I)	Output (Q)	Memory Bit	Memory Word	Timer
1	START	I0.0
2	STOP	I0.1
3	SENS_CAR	I0.2
4	PB_FLOOR1	I0.3
5	PB_FLOOR2	I0.4
6	PB_FLOOR3	I0.5
7	SENS_OUT1	I0.6
8	SENS_OUT2	I0.7
9	SENS_OUT3	I1.0
10	LAMP_FLOOR1		Q0.0
11	LAMP_FLOOR2		Q0.1
12	LAMP_FLOOR3		Q0.2
13	GATE_OPEN		Q0.3
14	LAMP_FULL		Q0.4
15	COUNT_FLOOR1				MW2
16	COUNT_FLOOR2				MW4
17	COUNT_FLOOR3				MW6
18	TIMER_GATE					DB1
19	SYSTEM_ON			M0.0
20	IR_TIMER_GATE			M0.1
21	CAR_DETECT			M0.2
22	IR_PB_FLOOR1			M0.3
23	IR_PB_FLOOR2			M0.4
24	IR_PB_FLOOR3			M0.5
25	IR_SENS_OUT1			M0.6
26	IR_SENS_OUT2			M0.7
27	IR_SENS_OUT3			M1.0

Multi-Level Parking Control Program

Three-Floor Parking System Using Siemens TIA Portal

RUNG 1 (SYSTEM ON)

In this Rung, the memory bit SYSTEM_ON (M0.0) will be in a HIGH state if the START (I0.0) button is pressed. The memory bit SYSTEM_ON (M0.0) will remain in a HIGH state even though the PB_START (I0.0) button has been released. Because it uses Latching.

If the STOP (I0.1) button is pressed, then the memory bit SYSTEM_ON (M0.0) will return to a LOW state.

RUNG 2 (CAR DETECT)

In this Rung, the memory bit CAR_DETECT (M0.2) will be in a HIGH state when the NO contact of the memory bit SYSTEM_ON (M0.0) and the SENS_CAR (I0.2) sensor are in a HIGH state.

The memory bit CAR_DETECT (M0.2) will remain in the HIGH state even though the NO contact of the SENS_CAR (I0.2) sensor has been in the LOW state. Because it uses the SET Output instruction.

Because it uses the RESET Output instruction, the memory bit CAR_DETECT (M0.2) will be in the LOW state if the NO contact of the IR_TIMER_GATE (M0.1) timer has been in the HIGH state.

RUNG 3 (FLOOR-1)

In this Rung, the LAMP_FLOOR1 (I1.0) output will be ON if the NO contact of the memory bit CAR_DETECT (M0.2) and the memory word COUNT_FLOOR1 (MW2) is Less Than “15”.

Because the memory word COUNT_FLOOR1 (MW2) uses an Increment instruction, the value of the memory word COUNT_FLOOR1 (MW2) will increase (+1) if the PB_FLOOR1 (I0.3) button is pressed.

PLC Program for Multi-Level Vehicle Parking System

RUNG 4 (FLOOR-2)

In this Rung, the LAMP_FLOOR2 (Q0.1) output will be ON when the NO contact of the memory bit CAR_DETECT (M0.2) and the memory word COUNT_FLOOR2 (MW4) is Less Than “15”.

Because memory word COUNT_FLOOR2 (MW4) uses an Increment instruction, the value of the memory word COUNT_FLOOR2 (MW4) will increase by (+1) when the PB_FLOOR2 (I0.4) button is pressed.

Vehicle Counting and Parking Slot Control Using PLC

RUNG 5 (FLOOR-3)

In this Rung, the LAMP_FLOOR3(Q0.2) output will be ON when the NO contact of the memory bit CAR_DETECT (M0.2) and the memory word COUNT_FLOOR3 (MW6) is Less Than “15”.

Because the memory word COUNT_FLOOR3 (MW6) uses an Increment instruction, the value of the memory word COUNT_FLOOR3 (MW6) will increase by (+1) when the PB_FLOOR3 (I0.5) button is pressed.

RUNG 6 (CAR OUT SENS)

In this Rung, the value in the memory word COUNT_FLOOR1 (MW2) will decrease (-1) when the NO contact of the memory bit SYSTEM_ON (M0.0) and the SENS_OUT1 (I0.6) sensor are in the HIGH state. Because it uses the Decrement instruction.

When the SENS_OUT2 (I0.7) sensor is in the HIGH state, the value in the memory word COUNT_FLOOR2 (MW4) will decrease by (-1). Because it uses the Decrement instruction.

And, the value in the memory word COUNT_FLOOR3 (MW6) will decrease by (-1) when the SENS_OUT3 (I1.0) sensor is in the HIGH state. Because it uses the Decrement instruction.

RUNG 7 (CAR PARKING FULL INDICATOR)

If the NO contact of the memory bit CAR_DETECT (M0.2) is in the HIGH state and the value of the memory words COUNT_FLOOR1 (MW2), COUNT_FLOOR2 (MW4), and COUNT_FLOOR3 (MW6) is Equal To “15”, then the output LAMP_FULL (Q0.4) will be ON.

RUNG 8 (GATE OPEN)

The output GATE_OPEN (Q0.3) will be ON when the NO contact of the memory bit CAR_DETECT (M0.2) is in the HIGH state and any of the buttons PB_FLOOR1 (I0.3), PB_FLOOR2 (I0.4), or PB_FLOOR3 (I0.5) is pressed.

The TIMER_GATE (DB1) timer will start counting up to 7 seconds. When the TIMER_GATE (DB1) timer has finished counting.

Even if any of the buttons PB_FLOOR1 (I0.3), PB_FLOOR2 (I0.4), PB_FLOOR3 (I0.5) have been released, the GATE_OPEN (Q0.3) will remain ON. Because it uses Latching.

When the TIMER_GATE (DB1) timer has finished counting, the GATE_OPEN(100.03) output will be OFF because the NC contact of the memory bit IR_TIMER_GATE (M0.1) is in the HIGH state.

Tia Portal PDF

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