MultiSmart Integrator Guide
Page 16 of 20
MultiSmart_Integrator_Guide_R01.doc
7.4 Planning for communications outages
The previous section explains how to set up SOE rather than using Most Recent values. This is especially
useful for dealing with communications outages.
The principle is straightforward. Simply calculate:
•
What is the maximum likely downtime – e.g. replacement time for a radio or a repeater
•
What are the typical or worst case number of events in each type during this period
Set up the SOE size accordingly. The size can often be estimated by reviewing the statistics of the
master station for each site.
You need to consider the impact of a repeater failing in a radio network – when all of the sites come back
on line, how much traffic will be required to flow through the network. Therefore, there is a trade off
between the desired buffer size for one site and the amount of traffic that might be required if a repeater
fails then comes back on line.
7.5 Multiple DNP slaves
It is possible to configure a MultiSmart unit with multiple DNP Slaves. This is particularly useful if a
redundant communications path is desired. In order to set up a second channel, do the following:
Go to
on the LCD, and press
Add DNP Slave
Once the unit restarts, set up the communications channel for the second slave. This can be done via the
Advanced screen.
•
•
Set the Comms Channel parameter to the desired comms channel
•
If you need to modify the baud rate and other comms parameters:
o
Go
to
(Selected channel), and modify
parameters.
The slave will be created with a blank points list. If you want the second slave to be configured with the
default points list:
•
Go to Settings-> More-> Communications-> DNP3-> DNP Slave
•
Press Next Slave to bring up Slave 2 configuration.
•
Press More, and then press Regenerate Points List
•
When the unit restarts, the second slave will have the default points list
Lobley St SPS SP331 General (Electrical Manual (MPA) Multismart Manual Multitrode System Integrator Guide) General
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Active 26/09/2013
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