Bosch Appliances D9412G, D7412G manual Path # Retry Count is set to, Poll Rate Timeline

D9412G/D7412G Program Entry Guide 6.0 RADXAUX1

EN 124

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 with the supervision of the SDI device (the connection of the SDI device to the 9000 series 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, this programming prompt must be set to a non- zero value. Failure to program a value into this field could prevent a failed network communications path from restoring back to normal.

Each time the SDI Path sends this Heartbeat Event, it expects an acknowledgement within the amount of time programmed in Path # Ack Wait. If the acknowledgement is not received, the control panel checks to see 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 as 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 Poll Rate is programmed with a value and the central station does not acknowledge the poll from the control panel, command centers do not annunciate a trouble condition. To transmit this event to the central station, see the Comm Fail prompt in Section 2.13.2 Panel-Wide Relays.

If the control panel is programmed to send Heartbeat Events to the central station, consider the frequency. If the poll rate to the central station is less than 60 seconds, the connection with RPS over a LAN or WAN becomes increasingly difficult the lower the poll rate is set.

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 is over.

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.

Example of Retry Count:

An acknowledgement of the heartbeat was not received in 10 seconds. The Heartbeat Event re- sends after the first 10 second ack wait period expires. If this Heartbeat Event is not acknowledged, the control panel declares this path as failed (and generates the Comm Fail ## Event). It continues to re-send the Heartbeat Event every 10 seconds until it is acknowledged.

Figure 10: Poll Rate Timeline

				2												4
																5
				3												6
																7
	1
	10	20	30	40	50	60	70	80	90	100	110	120	130	140	150	160	170	180	190	200	210
	8												9
1 - Control panel powered up										6 - No acknowledgement, Heartbeat re-sent, retry #2
2 -	Acknowledgement received									7 - Path declared as failed
3 -	Heartbeat Event sent									8 -		10-second interval
4 - Second Heartbeat Event sent										9 - Additional Heartbeats sent every 10 seconds until
5 - No acknowledgement, Heartbeat re-sent, retry #1												acknowledged

Bosch Security Systems 1/04 47775E