10
Preparing a Power Line Repeating Network for Installation
between the proxy agent and the target device.
If you clear this check box, a default interval is calculated based on the
network topology for all hops in the repeating chain.
Use Retry Count
You can change the number of times a network message is re-sent when
no confirmation is received. The default value is 3 attempts.
This means that the proxy agent will attempt to re-send a network message
to the target device three times. If confirmation is still not received, the
SmartServer will re-send the message through the repeating chain to the
proxy agent, which again attempts three times to deliver the message to
the target device. If confirmation is still not received, the process of the
SmartServer sending the message to the repeating agents and the proxy
agent making three attempts to deliver the message is repeated one more
time. After that the SmartServer switches to the secondary frequency and
repeats this process up to three times. Ultimately, a total of 18 attempts
will be made to deliver a network message to a target device.
If a device cannot be reached, it will be marked offline (red) in the tree
view and in the
Power Line Repeating Analysis
Web page. Network
messages will not be propagated to an offline device until the
Minimal
Offline Time
expires (this property is fixed at
1
minute on a power line
repeating channel). In addition, the data points on the device will be
marked offline in the SmartServer applications with the unplugged icon
(
). All subsequent data point requests will also mark the data point
offline.
Once the
Minimal Offline Time
(1 minute) elapses, a single data point
request is sent to the device. If the device executes the request, the device
and the data point are marked online and the device executes all failed
data point requests.
Note that if you specify a retry count that is greater than the default three
and you set the transmit timer to a long interval, the SmartServer may
reduce the specified retry count. In addition, the retry count may be
reduced for the devices on the repeating chain prior to the proxy agent
based on the total transaction time between the proxy agent and the target
device relative to the non-group receive timer.
If this check box is cleared, a default value, which can range from 0 to 15
attempts, is calculated based on network topology. Typically, the default
retry count on a power line repeating channel is 3.
8.
Click
Submit
.
Summary of Contents for i.LON SmartServer 2.0
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Page 14: ...xiv Preface...
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