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Keyboard Functions
The keyboard contains four push-buttons with separate
functions (SCROLL-down, SCROLL-up, MODE, and
CHANGE-LEVEL). The MODE and CHANGE-LEVEL, when
pressed together, provide a SAVE function.
1. SCROLL down-up push-buttons ( ). See Fig. 9. The
SCROLL down-up push-buttons ( ) are used to scroll
through the selectable messages. The double-headed
arrow ( ), which is located in the lower left position of
the second line of the display, represents the SCROLL
down-up push-buttons. The SCROLL down-up push-
buttons ( ) can be pressed to display the selectable
messages one at a time or held down to scroll through
the selectable messages at the rate of two per second.
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SAVE
)
Fig. 9. SCROLL (
push-button function.
SAVE
↔)
Fig. 10. CHANGE-LEVEL (
7
7800 SERIES S7800A KEYBOARD DISPLAY MODULE
When the last item of the selectable message is viewed,
the display wraps around and displays the first
selectable message again.
2. CHANGE-LEVEL push-button (
CHANGE-LEVEL push-button is used to change
between the first hierarchy of selectable messages to a
subset of selectable messages. The CHANGE-LEVEL
push-button can also be used to change from a subset
message to a first level selectable message. The
symbol (<), located on the second line in the lower right
corner of the display, represents a subset of selectable
messages.
3. MODE push-button, see Fig. 11. Use the MODE
push-button to instantaneously switch the display from a
second-line selectable message to a second-line
preempted message. The sixty second time-out
function can also be used for this task. The MODE
push-button only works if there is a second-line
preempted message or a lockout message.
push-button function.
↔
), see Fig. 10. The
SAVE
M1932A
SAVE
M1933A
65-0090—4
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