General

The Control Expert application is used to create your own diagnostic DFBs.

These diagnostic DFBs are standard DFBs that you will have configured beforehand with the Diagnostic property and in which you will have used the following two functions:

  • REGDFB to save the alarm date

  • DEREG to de-register the alarm

NOTE: It is strongly recommended to only program a diagnostic DFB instance once within the application.

These DFBs enable you to monitor your process. They will automatically report the information you will have chosen in the Viewer. You can thus monitor changes in state or variations in your process.

Advantages

The main advantages inherent in this service are as follows:

  • The diagnostic is integrated in the project, and can thus be conceived during development and therefore better meets the user's requirements.

  • The error dating and recording system is done at the source (in the PLC), which means the information exactly represents the state of the process.

  • You can connect a number of Viewers (Control Expert, Magelis, Factory Cast) which will transcribe the exact state of the process to the user. Each Viewer is independent, and any action performed on one (for example, an acknowledgement) is automatically viewed on the others.