Filtering packets – Echelon LonScanner FX Protocol Analyzer User Manual

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LonScanner FX Protocol Analyzer User’s Guide

Filtering Packets

You can use filters to select the types of packets that are written to the log file.

You can use two types of filters:

• A

global filter

that applies to all packets

• A

device filter

that applies to packets sent to and from specific devices on

the network

When the protocol analyzer receives a packet from the channel, it uses the global

and device filter to determine if the packet passes the filter requirements, as

described in Figure 9.

Does the packet pass the global

filter requirements?

Have any devices been defined

in the device filter?

Does the packet pass the device

filter requirements?

Yes

The packet does not

pass the filter

requirements.

The packet passes the

filter requirements.

Start

Figure 9. Filtering Packets

Important: Each time you modify the filter settings for a channel, the protocol

analyzer automatically saves those settings. Thus, every time you connect to a

channel, the protocol analyzer uses the last set of filter settings defined for the

channel.