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Page 49
Chapter 4: E2 Controller
4.2.3 Display Variables
The user interface display panel provides screens with three different forms of both the read-only and the modifiable variables:
• Numbers are displayed as positive (+) or negative (-) integers.
• Dual-State can be toggled between two (2) values, i.e. On/Off, Yes/No.
• Word Variables have a unique text message for each of the variable's possible choices.
4.2.4 Cursor Position in Screens
The following display screen is shown as an example after accessing a new menu loop display screen using the function keys.
The name of the menu loop is the line in the upper-most field of the screen. A flashing window also appears in the left of the
uppermost field, indicating that you're in the top level of that menu loop.
Figure 4-7. Flashing window.
From this position, the Up and Down arrow keys may be used to access additional selections within the current display
menu.
Each screen supports a specific functional requirement. Pressing the Enter key allows you access to the selected display screens
to adjust any of the modifiable fields. If a screen with modifiable values is accessed, you may use the Enter key to insert a flashing
cursor in the modifiable fields within that screen.
Figure 4-8. Flashing cursor.
If the flashing cursor is located in a modifiable field, the value of the field will be changed using the up and down arrow
keys. Press the Enter key to move the cursor to the next modifiable field. After entering the last modifiable field within a
screen, press the Enter key to remove the cursor and the enable the flashing window to reappear in the left-hand corner of
the upper-most field of the current screen. To get to the next adjacent menu loop screen, press the up or down arrow key.
Press the Enter key successively to advance the cursor through the various modifiable fields of the display screen,
eventually returning to the first field.
Values that are already correct may simply be skipped over by using the Enter key without modification of the variable. The
current value, if not changed, will be retained after pressing the Enter key. Values for fields being adjusted will automatically
wrap when adjusted beyond the high or low limit established for that field.
Whenever the flashing cursor is located in a modifiable field, press the Escape (Esc) key one time to return the user to the next
menu up. Each successive use of the Escape key returns you to the next menu level up until the Main screen is reached.