Technological Choices Used
Original instructions
About us
At a Glance
There are several ways of writing an application using Control Expert. The one proposed allows you to structure the application so as to facilitate its creation and debugging.
Technological Choices
The following table shows the technological choices used for the application.
Objects
Choices used
Use of the pump
Creation of a user function block (DFB) to facilitate management of the pump in terms of entering a program and speed of debugging. The programming language used to develop this DFB is a function block diagram (FBD)-based graphic language.
Use of the valve
Creation of a user function block (DFB) to facilitate management of the valve in terms of entering a program and speed of debugging. The programming language used to develop this DFB is a function block diagram (FBD)-based graphic language.
Supervision screen
Use of elements from the library and new objects.
Main supervision program
This program is developed using a sequential function chart (SFC), also called GRAFCET. The various sections are created in Ladder Diagram (LD) language, and use the different DFBs created.
Fault display
Use of the ALRM_DIA DFB to control the status of the variables linked with the detected errors.
NOTE: Using a DFB function block in an application enables you to:
  • simplify the design and entry of the program
  • increase the legibility of the program
  • facilitate debugging the application
  • reduce the volume of generated code