D9412GV2/D7412GV2 | Program Entry Guide | 6.0 GV2AUX EN | 128
Bosch Security Systems | 5/05 | F001U003636B
Path # Poll Rate
Default: 0
Selection: 0, 5 to 65535 seconds
0
Disables the heartbeat poll (not
recommended, refer to the first
Important Note that follows).
5 to 65535
Enables the poll rate for the amount
of time programmed here.
This prompt and the next two prompts determine how
the SDI Path is supervised between the SDI device
and the central station(s). Do not confuse the SDI Path
supervision with the supervision of the SDI device
itself (the connection of the SDI device to the control
panel). Each SDI Path can be configured to transmit a
Heartbeat Event to the central station for supervision
purposes. This ensures the integrity of the connection
at all times.
When sending reports to a central station
receiver over a network path, you must set
this programming prompt to a non-zero
value. Failure to program a value into this
field could prevent a failed network
communications path from restoring to
normal.
If the control panel is programmed to send
Heartbeat Events to the central station, a
rate of 60 sec maintains the virtual link in
most network configurations. As the poll
rate setting decreases, it becomes
increasingly difficult to send Heartbeat
Events to the central station within the
allotted time.
The control panel readjusts the poll rate if it
is less than 300 seconds to a temporary
poll rate of 300 seconds when online with
RPS. The poll rate returns to the
programmed value after the RPS session
ends.
The value programmed in
Path # Poll Rate
is the
interval at which the control panel sends a Heartbeat
Event to the central station connected to the same
network. The value programmed in
Path # Ack Wait
is the length of time the control panel waits for an
acknowledgment of the Heartbeat Event. If the
acknowledgment is not received, the control panel
checks to determine if the
Path # Retry Count
entry
is greater than 0. If so, the control panel retries the
number of times programmed (in
Path # Retry
Count
) to send the Heartbeat Event before declaring
the Path failed and generating a COMM FAIL SDI ##
(Path 1 = SDI 88, Path 2 = SDI 89, Path 3 = SDI 90,
Path 4 = SDI 91) Event.
If
Path # Poll Rate
is programmed with a value and
the central station does not acknowledge the poll from
the control panel, keypads do not annunciate a trouble
condition. To send this event to the central station,
refer to the
Comm Fail
prompt in Section 2.13.2 Panel-
Wide Relays on page 74.
Example of Heartbeat:
•
Path # Poll Rate
is set to 120 seconds
•
Path # Ack Wait
time is set to 10 seconds
•
Path # Retry Count
is set to 2
When the control panel first powers up, the first
Heartbeat Event for Path 1 is sent and is
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.
Figure 11: Poll Rate Timeline
10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 200 210
2
3
1
8
4
5
6
7
9
1 - Control panel powered up
2 - Acknowledgement received
3 - Heartbeat Event sent
4 - Second Heartbeat Event sent
5 - No acknowledgment, Heartbeat re-sent, retry #1
6 - No acknowledgment, Heartbeat re-sent, retry #2
7 - Path declared failed
8 - 10-second interval
9 - Additional Heartbeats sent every 10 seconds
until acknowledged
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