Installation guide

D6600 NetCom
RAM IV NetCom Programming
D6600 NetCom System Guide
© 2001 Radionics Page 67 46542C
If the panel is going to be programmed to send "heartbeat" events to the central station,
consideration must be given to the frequency. The connection with RAM IV over a Local or Wide
Area Network becomes increasingly difficult the lower the poll rate is set.
Each time the 9000 series panel sends this heartbeat event, it will expect an acknowledgement back within the
amount of time programmed in Path # Ack Wait. If the acknowledgement is not received, the panel checks to
see if the Path # Retry Count entry is greater than 0. If so, the panel will retry the number of times programmed
(in Path # Retry Count) to send the heartbeat event before declaring the Path as failed and generating a COMM
FAIL SDI ## event (Path 1 = SDI 88, Path 2 = SDI 89, Path 3 = SDI 90, Path 4 = SDI 91). If the Poll Rate is
programmed with a value and the Central Station does not acknowledge the Poll from the panel, Command
Centers will not currently annunciate a trouble condition. To transmit this event to the central station, see Comm
Fail in the Routing section.
As an example of how the "heartbeat" operates, let’s say the Path # Poll Rate is set to 120 seconds, the Path #
Ack Wait time is set to 10 seconds, and the Path # Retry Count is set to 2. In the example below when the
panel first powers up, the first ‘heartbeat’ event for Path 1 is sent and it gets acknowledged in 1 second. 120
seconds after the first heartbeat event is sent, the second heartbeat event for Path 1 is generated and sent to the
central station. To show how the Retry Count operates, we will assume that the acknowledgement is not
received in 10 seconds. When this occurs, the heartbeat event is re-sent after the first 10 second ack wait period
has expired. If this heartbeat event is not acknowledged, the panel declares this Path as failed (and generates
the Comm Fail SDI ## Event) but continues to re-send the heartbeat events every 10 seconds until it is
acknowledged.
Panel
Powered Up
10 second
interval
10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180
Additional heartbeats
sent every 10 seconds
until acknowledged.
190 200 210
'heartbeat' event
sent
Acknowledgement
received
Second 'heartbeat'
event sent
No ack, 'heartbeat'
re-sent, retry #1
No ack, 'heartbeat'
re-sent, retry #2
Path declared
as failed
about 500
milliseconds
difference
Figure 26: Poll Rate Timeline
Once the panel receives acknowledgement from the central station, the panel will then return to the normal Poll
Rate (which, in this example, is 120 seconds). If more than one SDI Path is being used, the 9000 series panel
will handle them on a successive basis. For example, in a “dual SDI Path application”, if SDI Path 1 did not
receive its acknowledgement within 10 seconds (using the previous example), the panel will move on to
SDI Path 2 to send its heartbeat event (and subsequently wait for the ack) before returning to SDI Path 1 to re-
send its heartbeat.
Entries are made in one second increments.
0 Disables the ‘heartbeat’ poll.
5 – 65535 Enables the poll rate for the amount of time programmed here.
Programming
Tip
0101
0101
0101
Even though RAM IV and the D5200 allow entries of 1 – 4, the 9000 series panel will interpret this as
an entry of 5.