Section 5: Sg-Dvl2A Operating Mode; Dvl2A In Standby Mode; Shutdown Of Line Card Communication With Cpm2; Cpm2 Error; Display Alarm Messages - DSC SG SECURITY MLR2-DV Instruction Manual

Section 5: SG-DVL2A Operating Mode

5.1 DVL2A Standby Mode
With the Line Card installed, apply power to the unit. This
message will be displayed on the LCD screen for 1 second:
SG-DVL2A CSL-X28
NOV 08,96 V 1.0
The following messages are sent to the printer and computer:
Printer: L0x???????Dx LCardReset
Computer: 0000 A Dx
A hexadecimal digit from 1 to E representing the number of
the Line Card will be sent for each "x" shown above.
After these start-up transmissions, the Line Card enters the
Standby Mode and monitors the telephone line and the
CPM2. Depending on the system's status, the following
conditions will be indicated:
DSR Lost
PAD Absent

• Shutdown of Line Card communication with CPM2

• CPM2 error; display alarm message

• Keep last alarm message

• System in Standby
5.2 Shutdown of Line Card
Communication with CPM2
A Line Card may be temporarily removed from CPM2 polling
for testing and maintenance purposes; refer to "CPM2 Utility
Modes" for information on shutting down a line card. While
in the shutdown mode, the Line Card will retain up to 256
alarm messages in its event buffer. When the Line Card is
shut down, the "Trouble" light will come ON and this message
will be displayed:
-L01-Digital Rec
LnCard Shutdown!
5.3 CPM2 Error; Display Alarm
Messages
If the DVL2A cannot detect CPM2 polling and there are no
alarm events in the event buffer, this message will be
displayed:
-L01-Digital Rec
<<-CPM Error!->>
If alarm messages cannot be sent to the CPM2 because of
the error, the DVL2A will display the oldest message which
has not been manually acknowledged. The "Alarm" light
will FLASH and the sounder will beep if the "Mute Buzzer"
Option is programmed as [00], [02] or [03].
When a CPM2 Error is present, each alarm must be manually
acknowledged. Press the [ACK/FUNCTION] button to
acknowledge the alarm and silence the Line Card sounder.
If several alarms have been received but cannot be sent to
the CPM2, they will have to be individually acknowledged;
when all alarms are acknowledged, the Line Card sounder
will be silenced.
Up to 256 alarm messages for the printer and computer will
be retained in the CPM2 event buffer. When the event buffer
is full, the oldest messages will be deleted as new events
are recorded.
When the CPM2 Error condition is corrected, the alarm
messages in the event buffer will be transmitted to the CPM2.
5.4 Keep Last Alarm Message
The DVL2A may be programmed to leave the last alarm
message on the display screen until a new message is
received. A typical alarm message is shown below:
• "L01" indicates Line Card 01
• "1234" is the account code
• In this example, a 4-8-1 communication format is used.
• "240" is the event's location in the event buffer.

5.5 Standby Mode

When the Line Card is operating normally, this message
will be displayed:

5.6 Data Reception

During data reception, a message similar to this will be
displayed:
The DVL2A will send each message it receives to the printer
for review by the system operator.
firealarmresources.com
L03-1234-102
Alarm
_L01-Digital Rec
*Unit in Standby
In Communication
240
1234 56
9