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Section 4 -
Front Panel Operation
4.1
Introduction
The front panel consists of a 128x32 pixel monochrome graphic OLED display with 6
membrane key switches below it. Each switch has legends on and above or below it to
indicate its function under different conditions, although there are certain common
functions to each screen, as detailed below.
For the purpose of the following sub-sections, the switches shall be referred to using the
legends on the buttons.
4.2
Common Switch Functions
The switches on certain types of screens and in certain modes, have the same functionality
as detailed here:
(a)
Menu screens
On the menu screen, the ‘
▲
’ & ‘
▼
’ switches are used to navigate through the menu
options. The ‘
Func
’ switch is used to go back to the main screen. The ‘
Zero
’ switch
doubles up as an Enter switch and this actions the chosen menu selection. This
may be to go to a sub-menu or to an editable or information screen (see HMI
breakdown for more details).
(b)
Editable screens
On any screen that has editable fields, switches ‘
▲
’ & ‘
▼
’ move the selection
between the possible editable fields. ‘
Func
’ goes back to the parent screen which is
usually the menu that was used to get to the screen in question. ‘
Zero
’ activates edit
mode (see below).
(c)
Edit mode
When in edit mode, the edit cursor appears on the first character in the editable field
(the cursor is a horizontal bar below the character being edited). If the field is bigger
than 1 character then switches ‘
◄
’ & ‘
►
’ are used to move left and right across the
field. If the field is only one character (e.g. a Yes/No selection) or has a rolling
selection (e.g. for selection of a percentage) then ‘
◄
’ & ‘
►
’ do nothing. Switches
‘
▲
’ & ‘
▼
’ are used to change the character being edited within the valid range (field
position dependant). ‘
Func
’ cancels edit mode and returns the field to it’s previous
value. ‘
Zero
’ accepts any changes to the field and also comes out of edit mode.
