Document No: LT0117
F4000 LCD Operator's Manual
System Description
Issue 2.38
19 April 2002
Page 2-17
LCD INFORMATION DISPLAYS (CONTINUED)
The "NEXT" and "PREV" keys display the information for the next or previous point.
The selection of the point depends upon the mode of the recall, either all points, or
searches for point status meeting certain criteria e.g. points in dirty alert.
(d)
History Recall Display - displays the stored event history. Newer and older events
are displayed by pressing the "NEXT" and "PREV" key respectively.
Pressing the "CLEAR" key whilst in the Zone Recall, Point Recall or History Recall displays
will make the system revert to the Base Display. All command sequences can be started
from any of the displays. Note, however, that how some command sequences proceed is
dependent upon which display was being shown. Refer Section 2.3.9 Starting Command
Sequences from Different Information Displays.
2.3.9 STARTING COMMAND SEQUENCES FROM DIFFERENT INFORMATION
DISPLAYS
The LCD keypad is usually in one of three modes:
(i)
Alarm List display, or "FFCIF", when alarms exist in the fire alarm system.
(ii)
Command Sequence Entry, when commands are being entered.
(iii)
Information Display mode, when zone status, point status, time and date or history
recalls are being shown.
Often, the pressing of a key to start a command sequence will have a different effect,
depending upon what mode the LCD was in.
As an example, pressing the "ZONE" key whilst the time and date are being displayed, will
result in a prompt for a zone number. If zone information was being displayed, however, the
LCD keypad would assume that the zone being viewed is the zone to be selected, and no
zone number would be requested.
If the LCD makes an assumption that is not correct, pressing the "CLEAR" key will allow an
operator to recover to a position at which, for example, the required zone number can be
entered, or, an alternative command sequence entered.
As a example, if zone status is displayed, and an operator wishes to reset system faults,
then pressing the "SYSTEM" key, followed by the "RESET" key results in the required
function being executed. However, if the "RESET" key had been pressed first, the LCD
keypad would have queried whether the zone that was displayed should be reset. In the
event of this occurring, pressing the "CLEAR" key will make the LCD keypad revert to the
zone status display. The "SYSTEM RESET" command sequence can then be used to
execute the required function.
Alternately, the "Clear" key can be pressed until the base display is obtained.
