Text Sets

These are sets of phrases or texts, defined by the system developer, that clearly identify, in a user-friendly way, the different values that state or discrete points can take.

These points can take a finite number of numeric values. For each of these values, a label is assigned that helps the system operator determine which situation the current numeric value corresponds to.

As an example, suppose we want to determine the current state of an electric motor, which can be on or off. The motor has a dry contact output which closes when the motor is on and remains open when it is off. This dry contact is connected to a digital input of a data acquisition Device. The motor being off will represent a logical 0 on the digital input, while the motor being on will represent a 1.

This information will later be transmitted to the SCADA system through a communication link and a telecontrol protocol such as MODBUS.

A suitable Set must be assigned to the point corresponding to the motor, containing, for example, the texts OFF and ON; these texts will be used in the event and alarm list and other places in the system where the motor’s state needs to be indicated.

These Sets are also used to define the texts to be displayed when an analog point’s limit is violated, according to the Limit Sets.

Screenshot

Definition

  • Click New in the upper right area of the window
  • Name: the name of the Text Set; this is for user reference and is also the name that will appear listed alongside the other sets when double-clicking the corresponding cell within the Points section
  • Click Save
  • Select the Text Set you just created
  • Click Add Text. Each click adds a row to the Texts table. For Single Bit points 2 rows are needed, for Dual Bit points 4 rows, for Quad Bit 8 rows, etc.
  • The Indication column contains the numeric value. To its right, in Text, you can (by double-clicking) edit the text corresponding to this numeric value
  • Repeat the operation for the remaining rows
  • Click Save
  • From now on the new Set will be available to be assigned in the Points section