Control Panel Panel Wide Parameters | en 65
Bosch Security Systems, Inc. Program Entry Guide 2017.03 | 09 | F.01U.303.998
Poll Rate (Destinations 1 to 4), ACK Wait Time (Destinations 1 to 4), and Retry Count
(Destinations 1 to 4) determine how the network destination is supervised between the
communication device and the central station receiver(s). Do not confuse the SDI2 destination
supervision with the supervision of the SDI2 device itself (the connection of the SDI2 device
to the control panel).
If this parameter is programmed with a value and the central station does not acknowledge
the poll from the control panel, keypads sound a trouble event. To send this event to the
central station, refer to Comm Fail for more information.
Heartbeat Example:
– Poll Rate (Destinations 1 to 4) = 120 seconds
– ACK Wait Time (Destinations 1 to 4) = 10 seconds
– Retry Count (Destinations 1 to 4) = 2
When the control panel first powers up, the first heartbeat poll for Destination 1 is sent and
acknowledged in 1 second. 120 seconds after the first heartbeat poll is sent, the second
heartbeat poll for Destination 1 is sent to the central station receiver.
Retry Count Example:
An acknowledgement of the heartbeat was not received within 10 seconds. The control panel
sends the next heartbeat poll after the first 10-second ACK wait period expires. If the central
station does not acknowledge this heartbeat poll, the control panel continues to resend. When
the resend count is reached, the control panel declares this path as failed and generates the
Comm Fail ## event. The control panel continues to re-send the heartbeat poll every 10
seconds until it receives an acknowledgement, even after declaring a Comm Fail.
When the control panel receives acknowledgement from the central station, the control panel
returns to the normal poll rate.
If more than one network destination is used, the control panel handles them on a successive
basis. For example, if acknowledgement from SDI Destination 1 is not received within 10
seconds (based on the above example), the control panel moves to SDI Destination 2 to send
its heartbeat poll, and subsequently waits for the ACK before returning to SDI Destination 1 to
resend the heartbeat poll.
Entries are made in 1-second increments.
– 5 minutes = 300 seconds
– 1 hour = 3600 seconds
– 12 hours = 43,200 seconds
– 18 hours = 64,800 seconds
If heartbeat polls are enabled to send by an SDI Destination, and ACK Wait Time
(Destinations1 to 4) is exceeded, a COMM FAIL ## event occurs. When this event occurs, all
events routed to this destination go immediately to the backup destination.
Notice!
When sending reports to a central station receiver over a network destination, set this
parameter to a non-zero value. Failure to program a value into this parameter could prevent a
failed network communication destination from restoring to normal.
If the control panel is programmed to send a heartbeat poll to the central station, a rate of 75
seconds maintains the virtual link in most network configurations. Decreasing the value for
this parameter increases the amount of idle communication between the SDI2 device and the
central station receiver. Increased idle communication between the control panel and receiver
decreases the control panel's event reporting efficiency.
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