Modifying program data via the display function using the buttons on the front panel

If a user wants to change the function block output data containing the program directly using the buttons on the front panel of the controller, display function blocks with the "modification authorised" parameter checked must be inserted in the program. The screens associated with the display supersede all the other displays of the front panel of the controller.

Only the symbols on the first line of the screen contain information about the status and activity of the controller.

The following screen shows an example user program containing 6 Display function blocks all with VALIDATE FUNCTION set to ON.

The first display has the following parameters:

Note: As soon as a display is inserted in the program, the default values of its parameters display an "empty" screen: the digital VALIDATE FUNCTION input is set to ON if it is not connected and the text selection and an empty string are selected by default in the parameters!

Of all the Display functions (LCD display) activated at a given time (validate function input set to on), only those which have the lowest 8 block numbers (Bxx) are displayed on the front panel.

The values can be modified as described in General information about controlling the controller via the buttons.

The start-up screen can be displayed briefly by pressing the ESC key.

The DISPLAY mode output – if it is authorised - is activated by pressing the ESC and OK keys simultaneously if the controller is being controlled via the buttons on the front panel, or by pressing ESC or OK and right-clicking with the mouse when in ClsM2 monitoring or simulation mode.

Warning: If OK is pressed after a value within a parameter has been modified, the M2 will write to its permanent memory (FLASH). This can distort the cycle time considerably, thereby corrupting processes based on this cycle time (real time, filtered digital input, filtered analog input, etc.).

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