Emerson Process Management ControlWave EFM 3808 - Manual (Page 184)

E-2 / Appendix E - Display/5x5Keypad CI-CW MICRO/CW EFM
Display/Keypad Assemblies are supported by Automatic Mode and Manual Mode.
Automatic Mode
In Automatic Mode a set of screens (based on the application load) are displayed. The
application programmer provides strings for the opening screen. From there the firmware is
responsible for displaying the screens and responding to key presses. Screens are fixed and
start off with an opening screen, which displays user information passed into the function
block. Users can view a list to select which list is to be scrolled. Once the list to be scrolled
has been selected, the user can scroll through the list by pressing the down arrow key. List
elements will be displayed automatically, scrolling at a predetermined rate (determined by
iiScrollTime). The user may pause on a variable by pressing the right arrow key. Pressing
the right arrow key again will cause the list to start scrolling again.
The essence of Automatic Mode is that the user can supply inputs into the function that
will determine which list can be displayed, but cannot change the menu or display. The
user is allowed to select a list and to start/stop scrolling.
Manual Mode
In Manual Mode the programmer is responsible for creating each screen and displaying the
next desired screen, based on key inputs. The programmer has access to all lines of the
display and can provide any string that he/she desires to display. Special formats that must
be adhered to that allow the programmer to display what they want on the screen are
provided in the description of iaScrnSruct in the ACCOL 3 Display function block within
ControlWave Designer’s On-Line Help. It should be noted that currently, Manual Mode
does not support reading Keypad keypresses. Note: Manual Mode operation requires
ControlWave Firmware 4.50 or newer.
If you're setting up the keypad, follow the configuration instructions provided in Section E3
of this appendix.
If your keypad has already been set up, Section E4 will tell you how to use the keypad and
interpret the display.
E2.1 DISPLAY FUNCTION BLOCK DESCRIPTION
Keypad and display control/configuration are handled by the DISPLAY Function Block.
This function block allows an operator to view/change variable data or to be allowed to
scroll through lists of variable data based upon their login privileges.
In order for the keypad and display to operate, the ControlWave Designer project must
include a properly configured DISPLAY Function Block. Use ControlWave Designer to
configure this function block and assign the parameters according to the four steps covered
in Section 3.
E2.1.1 DISPLAY Function Block Parameters
Referring to Figure 2, various DISPLAY Function Block Parameters are available. For
information on configuring the Display Function Block, please reference on-line help in
ControlWave Designer.