ENIGMA XM88422 Digital Receiver
Version 1.50
13
4. CPM Module
The CPM Module is the central processing module of
the ENIGMA XM88422 that controls the Line Cards
and forwards the information from the Line Cards to
the printer and the central station computer. The
CPM can monitor up to 30 Line Cards (15 Line Card
Modules)
General Information
The CPM Module incorporates two high-speed RISC
micro-controllers working together and sharing the
tasks of the CPM Unit between each other. This
allows very fast and effective system operation and
also unique features, like handling of big, graphical
display and implementing pull down menus and
dialog boxes for easy, user-friendly and efficient
programming of the system modules.
Features
Dual-microcontroller
architecture
and
multi-
tasking allow the receiver to perform functions
that might otherwise be delayed by a slow
computer acknowledgement response
Fast internal communication between system
modules ensures no delay in transfer information
between the CPM Unit and the Line Cards. The
CPM Unit polls all the Line Cards in less than 1
second.
8192 event (128 kBytes) printer and computer
alarm buffer
16 kBytes separate printer output buffer
Large, graphical LCD display
– user-friendly
environment
Ability to list, browse and examine the Line Card
messages on the screen.
Selectable font size on the LCD to improve
display visibility
Pull down menus and dialog boxes help
programming and diagnostics
User definable event libraries.
2 individual RS232 serial ports, COM1 and
COM2
Serial port data rates can be set at 1200, 2400,
4800, 9600, 14400, 19200 and 28800 baud.
Serial port data parameters (data bits, parity) are
programmable
External acknowledge input
2 OC Programmable Outputs to follow different
system status
CPM Controls
Liquid Crystal Display
240 x 128 dot graphical display, backlit for easy
reading in low light level environment. In normal
operation the LCD is capable to display 11 events at
a time with the normal font set, and 5 events with the
extended font set. The last system message and the
time and date are displayed in the bottom row of the
display. The upper row displays the main menu.
When executing the reset sequence, the ENIGMA
logo and version information is displayed.
Power LED
The Power LED indicates that power is applied to the
CPM Module.
Check LED
The Check LED flashes up in every ten seconds if
the watchdog circuitry of the CPM Module is
functional, and the microprocessor program is
running normally.
Event LED
The Event LED indicates that there is unreported
event in the memory buffer.
Trouble LED
If a trouble condition exists, the Trouble LED lights
up.
ENTER/ACK button
Used to manually acknowledge incoming events
when a computer is not connected or failed. Pressing
the Enter/Ack button will silence the buzzer and
register a “Manual Ack” event. The Enter/Ack button
is also used in the menus and dialog boxes when
programming for Enter and Store functions.
CLR button
This button is used to implement the Exit and Cancel
functions in the pull down menus and dialog boxes
when programming.
SHIFT button
Pressing the Shift button will change the font size of
the displayed list of events between normal and
extended fonts. Extended fonts are useful for
improving display visibility. Note, that after changing
the font size, only the last event will be remain
displayed. The previous events can be viewed by
browsing the list of events. When programming, this
button is idle.
Содержание XM88422
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