37
Section 13 - Detailed Description of Computers
13.1 COM Responses
When the CPM2000 sends an event to the computer, it
checks for 3 responses: Ack, Nack or Unknown/No
Response
An ACK tells the CPM2000 the computer got the event
successfully. A NACK tells the CPM2000 the computer got
the message but didn't understand it. The CPM will
attempt to send the message 20 times. If after 20
attempts it continually got NACK from the computer, the
CPM and line card will send a communication error event
to the printer, and then begin attempting to send the next
event in the Line card buffer to the computer. Any other
response from the computer, including no response will
cause the CPM to attempt to send the message again, up
to 4 attempts. If after 4 attempts the CPM got no
response or an unknown response, it will assume nothing
is connected and generate an alarm.
13.2 Automation Absent
When the computer is not responding to transmissions,
the CPM will generate a 'COMx Absent' or 'TCP/IP
Absent' trouble. When a trouble occurs, the CPM will
continue to attempt to send a signal to the computer until
it gets a response.
The CPM2000 will use the heartbeat signal to poll auto-
mation for a response. It will make 4 attempts, then wait
the next Heartbeat time before making another 4
attempts. The typical heartbeat interval is 30 seconds.
Supervisory Heartbeat Signal Protocol (1):
This signal is used to supervise the communication
between the receiver and the computer. It is sent to the
computer about every 30 seconds and is programmable
from the receiver. The computer should acknowledge this
signal with an [ACK].
The CPM can be programmed to send a test signal to the
computer once every 01-99 seconds to test the connec-
tion between the CPM and the computer (30 seconds is
recommended). If a heartbeat fails to get a response from
the computer, the CPM will immediately transmit the
heartbeat again, up to 4 attempts.
If all automation outputs failed, the CPM will start the
manual mode operation. (See manual mode). If the line-
cards buffers are full, the line-cards will stop answering
the calls.
1RR000sssssssssss@ssss[DC4]
RR:
Receiver number (Real programmed
number. Never virtual).
s:
Space Character.
@:
Supervisory Signal.
[DC4]:
Terminator, 14 Hex.
firealarmresources.com
Содержание MLR2000
Страница 4: ...NOTE firealarmresources com...
Страница 8: ...4 Figure 2 72 Line Cards Configuration Expansion cabinet firealarmresources com...
Страница 11: ...7 2 1 4 Signaling Supervisory Connections Figure 5 60 Line Cards Configuration firealarmresources com...
Страница 12: ...8 Figure 6 72 Line Cards Configuration Expansion Cabinet firealarmresources com...
