Learn CITECT-SCADA with Real Code Examples

Updated Nov 27, 2025

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Code Sample Descriptions

Hello World Message in Citect SCADA

Message("Hello World from Citect SCADA!");

Show a simple message box in Citect SCADA using Cicode.

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Increment an Integer Tag

INT val;
val = TagReadInt("Counter");
val = val + 1;
TagWrite("Counter", val);

Increase the value of an integer tag by 1.

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Toggle a Boolean Tag

BOOL current;
current = TagReadBool("LightOn");
TagWrite("LightOn", NOT current);

Toggle a boolean tag, useful for lights or motor start/stop.

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Display Tag Value in Graphic

REAL level;
level = TagReadReal("TankLevel");
SetLabelText("TankLevelLabel", NumToStr(level, 2));

Read a tag and display it in a numeric text object in a graphic.

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Acknowledge Active Alarms

AckAlarm("*");

Script to acknowledge all active alarms.

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Write Multiple Tags at Once

TagWrite("MotorStart", TRUE);
TagWrite("MotorSpeed", 50);

Set multiple tag values in a single script.

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Slider Control for Speed Tag

REAL speed;
speed = GetSliderValue("SpeedSlider");
TagWrite("MotorSpeed", speed);

Bind a slider in a graphic to update a speed tag.

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Log Button Click Event

STRING logEntry;
logEntry = DateTime() + " Button clicked";
WriteLog("ButtonLog", logEntry);

Log each time a button is pressed.

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Read Multiple Tags into Array

REAL values[2];
values[0] = TagReadReal("TankLevel");
values[1] = TagReadReal("PumpStatus");

Read several tag values and store them in an array.

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Conditional Action Based on Tag Value

REAL temp;
temp = TagReadReal("TankTemp");
IF temp > 80 THEN
    TagWrite("CoolerOn", TRUE);
ELSE
    TagWrite("CoolerOn", FALSE);
ENDIF;

Control another tag based on a condition.

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Code Sample Descriptions

Hello World Message in Citect SCADA

Message("Hello World from Citect SCADA!");

Show a simple message box in Citect SCADA using Cicode.

Let’s Try →

Increment an Integer Tag

INT val;
val = TagReadInt("Counter");
val = val + 1;
TagWrite("Counter", val);

Increase the value of an integer tag by 1.

Let’s Try →

Toggle a Boolean Tag

BOOL current;
current = TagReadBool("LightOn");
TagWrite("LightOn", NOT current);

Toggle a boolean tag, useful for lights or motor start/stop.

Let’s Try →

Display Tag Value in Graphic

REAL level;
level = TagReadReal("TankLevel");
SetLabelText("TankLevelLabel", NumToStr(level, 2));

Read a tag and display it in a numeric text object in a graphic.

Let’s Try →

Acknowledge Active Alarms

AckAlarm("*");

Script to acknowledge all active alarms.

Let’s Try →

Write Multiple Tags at Once

TagWrite("MotorStart", TRUE);
TagWrite("MotorSpeed", 50);

Set multiple tag values in a single script.

Let’s Try →

Slider Control for Speed Tag

REAL speed;
speed = GetSliderValue("SpeedSlider");
TagWrite("MotorSpeed", speed);

Bind a slider in a graphic to update a speed tag.

Let’s Try →

Log Button Click Event

STRING logEntry;
logEntry = DateTime() + " Button clicked";
WriteLog("ButtonLog", logEntry);

Log each time a button is pressed.

Let’s Try →

Read Multiple Tags into Array

REAL values[2];
values[0] = TagReadReal("TankLevel");
values[1] = TagReadReal("PumpStatus");

Read several tag values and store them in an array.

Let’s Try →

Conditional Action Based on Tag Value

REAL temp;
temp = TagReadReal("TankTemp");
IF temp > 80 THEN
    TagWrite("CoolerOn", TRUE);
ELSE
    TagWrite("CoolerOn", FALSE);
ENDIF;

Control another tag based on a condition.

Let’s Try →