DISPLAY FUNCTION (LCD DISPLAY)

The display function controls the liquid crystal display (LCD) integrated in M2 controllers (with the exception of the controllers in the series known as "economic EC..." and "bare board CN").

It also controls the M2 "front panel" window in CLS M2 during simulation and monitoring sessions. In effect, this front panel window is the image of the liquid crystal display for controllers with LCD and replaces the LCD on economic and bare board series controllers.

Using this function, the user can enter text (48 characters max.) or indicate which values are to be displayed and in which format (number, month, day, year, etc.)

All the standard ASCII characters (numbers, upper case letters, lower case letters and punctuation marks) plus accented characters and Greek letters can be used to display text in the DISPLAY function. Characters and symbols which do not appear in the input window when typed on the keypad are not available in the LCD matrix.

If it is set to OFF, the VALIDATE FUNCTION input can be used to disable the function (no display). If it is set to ON, it can be used to activate the selected displays in the parameters window. If it is not connected, this input is set to ON. Only 8 of these functions can be active simultaneously in one program. If more than 8 are active, only the first 8 (in order of compilation) are processed.

If the VALUE INPUT is not connected, the character string displayed on the LCD and in the "front panel" window will correspond to the selections made in the "User options" parameter field, i.e.:

The parameterisation box/Parameters tab is used to modify the parameters of all the display functions used at a time given in the edit window. This dialogue box also displays the string resulting from all the display strings described in the parameters for all the display functions in the edit window (text, date, time and values).

These parameters can only be modified in edit mode.

All the display functions are selected by their block number (BXX) chosen from the list on the top left of the parameterisation window. By default, this selection list suggests the number of the function block from which the dialogue box is opened. Each block number selected represents the display box associated with the function with this number.

The format string of the active block number is indicated by red letters or stars. If the strings become superimposed, a warning will appear underneath the grid and the affected cells will be displayed with a red background. All other strings are displayed in black. Each parameter window associated with a display function number has the following input commands:

If the VALUE INPUT is connected to the output of a function, the value of this output is displayed in the format indicated in the parameterisation window.

The integer value present on the input is converted into a corresponding display string which is placed starting at the location (line, column) in the grid. The format of the string displayed depends on the display formats selected in the parameters in edit mode.

Selecting the display style for an integer:

Selecting a calendar date format:

Modification option authorised: The user can use this check box to modify the following parameters directly:

Modifications are made using the dialogue buttons on the front panel of the controller or the image of the buttons shown on the front panel window in CLS M2.

Parameterisation box/Comments tab

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