Learn SIEMENS-TIA-PORTAL with Real Code Examples

Updated Nov 26, 2025

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Code Sample Descriptions

Hello World in Siemens TIA Portal (SCL - Structured Control Language)

IF Start_Button = TRUE THEN
    Motor_Output := TRUE;
ELSE
    Motor_Output := FALSE;
END_IF;

A basic SCL program in TIA Portal setting an output when a condition is met.

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Timer Example in TIA Portal (SCL)

TON_DB(IN := Start_Button,
    PT := T#5s,
    Q => Motor_Output,
    ET => Elapsed_Time);

Using an on-delay timer (TON) in SCL.

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Counter Example in TIA Portal (SCL)

IF Pulse = TRUE THEN
    Counter := Counter + 1;
END_IF;

A simple up-counter that increments when a signal is TRUE.

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Move Instruction in TIA Portal (SCL)

Temp_Value := Sensor_Value;

Copying a value into a variable using SCL.

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Analog Input Scaling in SCL

Scaled := (Raw_AI * 100.0) / 27648.0;

Scaling raw analog input (0–27648) to engineering units.

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Start/Stop Motor Logic (SCL)

IF Start = TRUE THEN
    Motor := TRUE;
END_IF;
IF Stop = TRUE THEN
    Motor := FALSE;
END_IF;

Basic motor latch logic using start/stop switches.

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Edge Detection (SCL)

Prev_Signal := Current_Signal;
Current_Signal := Input;
Rising_Edge := Current_Signal AND NOT Prev_Signal;

Detecting a rising edge of a signal.

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Array Loop in SCL

Sum := 0;
FOR i := 1 TO 10 DO
    Sum := Sum + Values[i];
END_FOR;

Summing values of an INT array.

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Simple FB With Input/Output (SCL)

Double_Value := In_Value * 2;

A Function Block that outputs double the input value.

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PID Call in TIA Portal (SCL)

PID_DB(
    PV := Process_Value,
    SP := Setpoint,
    OUT => Control_Output
);

Calling a PID controller block in SCL.

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Code Sample Descriptions

Hello World in Siemens TIA Portal (SCL - Structured Control Language)

IF Start_Button = TRUE THEN
    Motor_Output := TRUE;
ELSE
    Motor_Output := FALSE;
END_IF;

A basic SCL program in TIA Portal setting an output when a condition is met.

Let’s Try →

Timer Example in TIA Portal (SCL)

TON_DB(IN := Start_Button,
    PT := T#5s,
    Q => Motor_Output,
    ET => Elapsed_Time);

Using an on-delay timer (TON) in SCL.

Let’s Try →

Counter Example in TIA Portal (SCL)

IF Pulse = TRUE THEN
    Counter := Counter + 1;
END_IF;

A simple up-counter that increments when a signal is TRUE.

Let’s Try →

Move Instruction in TIA Portal (SCL)

Temp_Value := Sensor_Value;

Copying a value into a variable using SCL.

Let’s Try →

Analog Input Scaling in SCL

Scaled := (Raw_AI * 100.0) / 27648.0;

Scaling raw analog input (0–27648) to engineering units.

Let’s Try →

Start/Stop Motor Logic (SCL)

IF Start = TRUE THEN
    Motor := TRUE;
END_IF;
IF Stop = TRUE THEN
    Motor := FALSE;
END_IF;

Basic motor latch logic using start/stop switches.

Let’s Try →

Edge Detection (SCL)

Prev_Signal := Current_Signal;
Current_Signal := Input;
Rising_Edge := Current_Signal AND NOT Prev_Signal;

Detecting a rising edge of a signal.

Let’s Try →

Array Loop in SCL

Sum := 0;
FOR i := 1 TO 10 DO
    Sum := Sum + Values[i];
END_FOR;

Summing values of an INT array.

Let’s Try →

Simple FB With Input/Output (SCL)

Double_Value := In_Value * 2;

A Function Block that outputs double the input value.

Let’s Try →

PID Call in TIA Portal (SCL)

PID_DB(
    PV := Process_Value,
    SP := Setpoint,
    OUT => Control_Output
);

Calling a PID controller block in SCL.

Let’s Try →