User's Manual
Table Of Contents
- FCC and ISED (IC) statements
- 1. Introduction
- 2. Installing the option
- 3. Installing online devices
- 4. Online settings in the client
- 5. Issuing a ZigBee configuration card
- 6. System operation
- 7. Commissioning
- 8. Power loss and hardware failure
- 9. Redundancy and recovery
- Appendix A: Online devices
- Appendix B: Mounting of gateway and router
- Appendix C: Example configurations
- Appendix D: Web interface for gateway
- Appendix E: Reset of gateway
- Appendix F: Gateway boot-up
- Appendix G: More about how the gateway finds the server
- Appendix H: Firmware upgrade
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9.1.1 Automatic channel change
Note: Automatic channel change requires Visionline 1.12.2 or higher.
Note: Contact Technical support for details about how to enable automatic
channel change.
The channel is automatically changed if:
more than 25% of the end nodes are offline or have an LQI less than 30%
(requires the Orion EMS option) more than five offline alarms have been
received from the same thermostat during the last 24 hours; these alarms
are triggered when the thermostat detects that a motion detector, lock or
door switch is offline
The new channel is accepted if all routers report back within 15 minutes. If not,
a new channel is selected. When the new channel has been accepted it will be
retained during at least 24 hours even if the conditions above are met. At automatic
channel change, all 16 channels are used regardless of the channels selected by
the user.
9.2 Recovery
9.2.1 Polling
In order to preserve the battery, the ENs use a scheme called polling. Each EN wakes
up periodically to check (poll) its parent for messages. Any message for the node is
sent as an answer to the poll. The polling is the reason of variable answering times.
9.2.2 Fallback
If the poll does not give any answer five successive times, the EN has a fallback
procedure. The missing answer can have two causes:
the parent is offline due to a power cut
the channel is jammed
In the latter case, follow steps 1-3 in section Communication channel to choose
another channel. The EN will start orphan joining as a fallback, but continue to
send polls even after this. This will find the parent in case there has been a
channel switch. It will also find the parent in case there has been a power cut
and the power returns. Due to the high power consumption of orphan joining,
it will be performed at very long intervals:
Initially, the interval will be one minute.
For every time the orphan join fails, the interval is doubled until it reaches
three hours.
Note: RTs have the same functionality, but as they are powered externally they
will make an orphan join every 30 seconds.