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5
Keypad L240/PT
5.1
General description
Operation of the L240
Keypad L840/PT can be used both by system users for comfortable
operation as well as by Engineers to perform maintenance work or
programming of the system. The messages are shown in plain text on the
two line LCD display panel.
Located below the LCD display is a status LED for indication of fault or alarm
states. In the external set state, only the date/time is displayed and the LED
underneath the LCD keypad lights up.
Description of the buttons
Button
Function
1
2
0
,
-
Menu selection, entry of functions/parameters
X
Exit menu, go back a program step,
whereby changes are accepted!
?
Indicates the selection of the input possibilities and
further information (e.g. in the event log)
>
<
Page up/down in the menu list,
-
in the event or access memory
!
Reset of alarms,
incl. tamper alarms
Description of the status LED
The LED lights continuously if everything is OK
During an operating fault, signal, tamper and circuit alarm the LED
flashes. The user can log in and view the signal
22
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