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Section 8 - CPM2 Central Processing Module
8.1
General Information
The CPM2 16-bit microcontroller and real-time
assembly language program running at 16 MHz allow
the system to quickly and efficiently execute several
tasks at the same time. The use of a unique menu dis-
play system enhances the system’s ease of use for the
operator and makes the system configuration and
programming simple and efficient. Several diagnostic
modes are available to assist the operator in trouble-
shooting and maintenance.
8.2
Feature
• Multi-tasking allows the receiver to perform func-
tions that might otherwise be delayed by a slow
computer acknowledgment response
• Fast internal communication results in practically
no delay in transfer of information between the line
card and the CPM2.
8.3
CPM2 Controls
• 128-event computer alarm message buffer
• 128-event printer alarm message buffer
• LCD contrast easily adjusted
• Ability to individually examine each line card mes-
sage
• “Cold boot” option allows easy installation of
default configuration
• Built-in diagnostic “debug” mode allows each line
card to be monitored individually
• Serial port COM1 features LED indicators for Trans-
mit (Tx) and Receive (Rx) functions
• Available COM1 Baud rates: 110, 150, 300, 600,
1200, 2400, 4800, 9600, 19200 or 38400
• COM1 Data bits: 7, 8 or 9
• COM1 Parity: Even, odd or none
• COM 1 Stop bits: fixed at 1
• Built-in Serial Communication Diagnostic Mode for
COM1. The technician can test the communication
with the central station computer and monitor
what is being transmitted to and received from the
computer
• Two programmable outputs, one with front panel
LED indicator
• Buzzer mute option for system testing
• System menu for easy programming and diagnos-
tics
• Software version 2.1 (or higher) supports SCADA
(SCADA stands for Supervisory Control and Data
Acquisition) line cards for networks of receivers
• Software version 2.1 (or higher) supports line card
and CPM2 programming through computer soft-
ware interface
• Software version 2.4 (or higher) allows up to 30
line cards to be connected to a single CPM2.
Figure 9, CPM2 Front View
8.3.1 Liquid Crystal Display
2-line, 16 character per line liquid crystal display;
backlit for easy reading in low level light
8.3.2 “Option” light
Indicates the state of the “Option” programmable
output. Flashing 2 seconds ON, 2 seconds OFF, with
the standard program.
8.3.3 [ACK] button
Used to manually acknowledge an alarm event when a
computer is not connected to the receiver or when
the UL Receiver option is enabled. Press the [ACK]
button to turn the “ACK” light OFF and silence the
buzzer. The [ACK] button is also used in the Configura-
tion mode to select menu items.
8.3.4 “ACK” light
Flashes when a message is received from the line card
and COM1 is disabled or disconnected.
8.3.5 [Enter] button
Executes a command or scrolls the display to the next
message.
8.3.6 “TX” light
Monitors the COM1 transmission signal.
8.3.7 [Backspace] button
Used to erase errors or move the cursor back one
character; also used to scroll the display back to the
previous message.
8.3.8 “RX” light
Monitors the signal received from the computer con-
nected to COM1.
8.3.9 [Escape] button
Used to save changes and exit a mode; also used for
other functions when indicated on the display screen.
8.3.10 “AC” light
Indicates that AC power is present.
Summary of Contents for MLR2E
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