22
[Enter] is pressed, a message similar to this will be displayed:
L01-1234-05
Alarm
xx
• xx indicates the number (in hexadecimal) of printer
messages in the Line Card buffer.
Press the [Enter] button to scroll through the messages;
the messages will be displayed in order from the most recent
to the oldest. Press the [Backspace] button to scroll from
the oldest message to the most recent.
When finished viewing the messages, press the [Escape]
button.
[F] Examine Computer Messages on Display Screen
With the CPM2 in the Standby Mode, press the [F] key to
review computer messages on the display screen. When
the [F] key is pressed, this message will be displayed:
Examine COM1 msg
LCard#:F ent:EXE
Enter a hexadecimal number to view the following:
Enter...
to view
“0”
CPM2 internal trouble messages (if any)
“1” to “E” Computer messages for specified Line Card
“F”
Computer messages for all Line Cards
If an error is made in entering the number, simply re-enter
the desired number again on the keypad.
Press the [Backspace] or [Escape] button to cancel this
function and return to the Standby Mode. Or, press the
[Enter] button to view the indicated messages. When the
[Enter] button is pressed, the CPM2 will display the computer
messages, starting with the most recent message. When
[Enter] is pressed, a message similar to this will be displayed:
1011......0000.A
..03 1.06 xx
• xx indicates the number (in hexadecimal) of computer
messages in the Line Card buffer.
Press the [Enter] button to scroll through the messages;
the messages will be displayed in order from the most recent
to the oldest. Press the [Backspace] button to scroll from
the oldest message to the most recent. When finished viewing
the messages, press the [Escape] button.
8.10 MLR2-DV Computer Interface
The CPM2 is able to send alarm messages to a computer
connected to the COM1 serial port. This section describes
the communication procedures, and the communication
formats available for use.
Overview of Communication
When the CPM2 receives data from a Line Card, it forwards
the data to COM1 and awaits an acknowledgment signal
from the computer. If a NAK signal is received from the
computer, the CPM2 will make 4 attempts to send the
data. If all four attempts fail, CPM2 buzzer will sound and
the CPM2 will retain the alarms in its internal buffer until
communications are restored. This routing provides reliable
and supervised communication between the CPM2 and
the Line Cards.
The CPM2 also monitors the connection to the computer by
sending a supervisory “heartbeat” signal through COM1
every 30 seconds. If the “heartbeat” transmission determines
that the computer is off-line or disconnected, a message
similar to this will be sent to the printer:
Com#1 Absent!! 09:45-21/09/92
Note that the message indicates the time and date that
communications through COM1 were determined to be
interrupted.
When COM1 communications are re-established, a message
similar to this one will be printed:
Com#1 Restored 09:50-21/09/92
Note that the message indicates the time and date that
communications through COM1 were determined to be re-
established.
The “heartbeat” feature may be disabled if this feature is
not compatible with the central station automation software
being used on the computer.
CPM2 COM1 Status Report Messages
The CPM2 will send the following messages to COM1 to
report internal status conditions. CPM2 will use an Account
Code of “0000” to indicate that it is reporting an internal
condition. The line number is fixed to be "0".
Sent to COM1
Event
0000 A 00:
Reserved to indicate Operator activity for C
or ESC mode (Not Implemented in this program version).
0000 A 01:
Printer Error
0000 R 02:
Printer Restored
0000 A 03:
12V Battery Low
0000 R 04:
12V Battery Restored
0000 A 05:
COM#1 Absent
0000 R 06:
COM#1 Restored
0000 A 07:
UPS AC Fail
0000 R 08:
UPS AC Restored
0000 A 11:
9V Batt. Low
0000 R 12:
9V Batt. Restr
0000 A 13:
COM#2 Absent
0000 R 14:
COM#2 Restored
0000 A 15:
AC Failure
0000 R 16:
AC Restored
0000 A 17:
UPS Low Battery
0000 R 18:
UPS Low Batt Restr
0000 T 19:
CPM2 Master Fail
0000 A C1 to CE:
Internal communication error
NOTE
: Trouble can be caused by bad backplane connections
or RAM failure. Coldboot may be necessary.
0000 A D0:
CPM2 Reset
0000 A F1 to FE:
Line Card 01 to 0E Absent
0000 R E1 to EE:
Line Card 01 to 0E Restored
The following messages will be sent to COM1 to report
status changes on the Line Cards. Again, the Account Code
of “0000” indicates that an internal event is being reported.
The line number varies depending on which line card is
reporting.
Sent to COM1
Event
0000 A
20:
Line Fault on Line Card
0000 R
30:
Line Restored on Line Card
0000 P
0X:
Audio on line X
0000 A
D1 to DE: Line Card 01 to 0E Reset
xxxx A
0A
Account xxxx not responding
xxxx R
0A
Account xxxx back on-line
Section 8
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