Nexto XF #60 – Using the STATISTICS_REAL Functional Block

The purpose of this tutorial is to explain how to insert and use the STATISTICS_REAL functional block in a MasterTool X project.

Components

Equipment: 1 computer/laptop.

Software:  MasterTool X

Tutorial Sections

1. ARCHITECTURE
2. DEVELOPMENT

1.ARCHITECTURE

A computer/laptop is required to use MasterTool X.

Figure 1. Computer running MasterTool X

2.DEVELOPMENT

The STATISTICS_REAL block is used to calculate basic statistical values of a variable over time, allowing analysis of signal behavior within the system.

It is very useful for monitoring and data analysis in industrial applications.

Prerequisite

The STATISTICS_REAL block is only available in the Util library.

Therefore, the library must be added to the project through the Library Manager.

Functionality

The STATISTICS_REAL block calculates statistical values based on the data received at the input over time.

Unlike STATISTICS_INT, the only difference is the data type analyzed, which in this case is REAL.

The block continuously performs calculations based on the values received at IN:

• Updates the minimum value (MN) when a lower value is found
• Updates the maximum value (MX) when a higher value is found
• Calculates the average (AVG) considering values over time

Inserting the block into the logic

The block does not appear directly in the toolbox, so it must be inserted manually:

1. Create a new network
2. Insert a generic box (EN/ENO)
3. Inside the box, type:
   STATISTICS_REAL

Figure 2. Adding the STATISTICS_REAL Functional Block

Input Parameters

IN (REAL)

• Input value to be analyzed

RESET (BOOL)

• Resets the statistical calculations when TRUE

Outputs

MN (REAL)

• Minimum recorded input value

MX (REAL)

• Maximum recorded input value

AVG (REAL)

• Average (arithmetic mean) of the input

Application example

Reference_Temperature :REAL; //IN

RESET_STATISTIC: BOOL; //RESET

Results:

• MN → lowest recorded temperature
• MX → highest recorded temperature
• AVG → average temperature over time

Figure 3. Parameterization of the STATISTICS_REAL block

Applications in automation

The STATISTICS_REAL block is used in:

• Monitoring of analog variables
• Process performance analysis
• Recording minimum and maximum values
• Calculating averages for supervision
• Integration with supervisory systems

Important notes

• Works with variables of type REAL
• Requires the Util library
• RESET clears the accumulated history
• Ideal for continuous signal analysis

In summary, the STATISTICS_REAL block allows performing real-time statistical analyses, being an important tool for monitoring, diagnosis, and process optimization in automation systems.

Figure 4. Operation of the STATISTICS_REAL block