Learn ROCKWELL-STUDIO5000 with Real Code Examples

Updated Nov 26, 2025

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Code Sample Descriptions

Hello World in Studio 5000 (Structured Text)

IF Start_PB THEN
    Motor_Run := TRUE;
ELSE
    Motor_Run := FALSE;
END_IF;

A simple Structured Text routine turning on an output.

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TON Timer Example (ST)

TON_Timer(IN := Start_PB,
    PT := T#5s,
    Q => Done,
    ET => Elapsed);

Using an Allen-Bradley TON timer in ST.

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CTU Counter Example (ST)

CTU_Counter(CU := Pulse,
    RESET := Reset,
    PV := 10,
    CV => Count);

A simple up-counter using CTU.

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Move Instruction (ST)

Output_Value := Input_Value;

Copying a tag's value using MOV equivalent in ST.

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Scaling Analog Input (ST)

Scaled := (Raw_AI * 100.0) / 16383.0;

Scaling a 0–16383 analog input to 0–100 engineering units.

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Start/Stop Motor Latch (ST)

IF Start_PB THEN
    Motor := TRUE;
END_IF;
IF Stop_PB THEN
    Motor := FALSE;
END_IF;

Classic motor latch logic in Studio 5000 ST.

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Rising Edge Detection (ST)

Prev := Curr;
Curr := Signal;
Rising_Edge := Curr AND NOT Prev;

Detecting a rising edge on a BOOL tag.

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Array Summation (ST)

Sum := 0;
FOR i := 0 TO 9 DO
    Sum := Sum + Values[i];
END_FOR;

Looping through a DINT array to calculate the sum.

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Simple AO Scaling (ST)

Analog_mA := (Control_Output * 16.0) + 4.0;

Scaling a controller output to a 4–20 mA analog signal.

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PID Call in Studio 5000 (ST)

PID(
    PV := Process_Value,
    SP := Setpoint,
    CV => Control_Output,
    EN := TRUE
);

Calling an A-B PID instruction in Structured Text.

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Code Sample Descriptions

Hello World in Studio 5000 (Structured Text)

IF Start_PB THEN
    Motor_Run := TRUE;
ELSE
    Motor_Run := FALSE;
END_IF;

A simple Structured Text routine turning on an output.

Let’s Try →

TON Timer Example (ST)

TON_Timer(IN := Start_PB,
    PT := T#5s,
    Q => Done,
    ET => Elapsed);

Using an Allen-Bradley TON timer in ST.

Let’s Try →

CTU Counter Example (ST)

CTU_Counter(CU := Pulse,
    RESET := Reset,
    PV := 10,
    CV => Count);

A simple up-counter using CTU.

Let’s Try →

Move Instruction (ST)

Output_Value := Input_Value;

Copying a tag's value using MOV equivalent in ST.

Let’s Try →

Scaling Analog Input (ST)

Scaled := (Raw_AI * 100.0) / 16383.0;

Scaling a 0–16383 analog input to 0–100 engineering units.

Let’s Try →

Start/Stop Motor Latch (ST)

IF Start_PB THEN
    Motor := TRUE;
END_IF;
IF Stop_PB THEN
    Motor := FALSE;
END_IF;

Classic motor latch logic in Studio 5000 ST.

Let’s Try →

Rising Edge Detection (ST)

Prev := Curr;
Curr := Signal;
Rising_Edge := Curr AND NOT Prev;

Detecting a rising edge on a BOOL tag.

Let’s Try →

Array Summation (ST)

Sum := 0;
FOR i := 0 TO 9 DO
    Sum := Sum + Values[i];
END_FOR;

Looping through a DINT array to calculate the sum.

Let’s Try →

Simple AO Scaling (ST)

Analog_mA := (Control_Output * 16.0) + 4.0;

Scaling a controller output to a 4–20 mA analog signal.

Let’s Try →

PID Call in Studio 5000 (ST)

PID(
    PV := Process_Value,
    SP := Setpoint,
    CV => Control_Output,
    EN := TRUE
);

Calling an A-B PID instruction in Structured Text.

Let’s Try →