Trane BACnet MS/TP Installation, Operation And Maintenance Manual page 25

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BAS-SVX51L-EN
rate is incredibly low. The same link with a problem, such as a duplicate address for example, has
9,000 blue diagnostics with 82,000 messages. Problems like these are not subtle or difficult to detect.
Unless you are dealing with an intermittent problem, a 5-minute capture is usually enough for
troubleshooting.
Gray lines/token passing — You should then see an orderly series of token passing messages,
which are gray. These should be error-free (uninterrupted by blue lines), and there should be
thousands of them every minute. You should be able to see every address on the link passing the token
along in order by address
Black lines — There should be occasional larger messages in black if there is a Tracer
front end on the link. These are data requests or data writes.
Capture button — Clicking this initiates a capture on the BACnet
Triggers button — Use this button to initiate or end a capture based on an event or circumstance
occurring on the link.
Statistics button — Refer to
Port button — Refer to
"Trane SerialSpy Protocol Analyzer Software," p. 23
button is used.
Log button — The Log button allows you to continuously save a capture to a specified file location.
Save button — The Save button saves the current capture to a specified file. These saved files can
be emailed to Tech Support. Longer saved captures of an hour or more make very large files that are
difficult to email.
Load button — The Load button allows you to open a previously saved capture file.
Tail button — When you click the Tail button, you see a very fast scroll of messages flashing by. When
viewing the tail you can begin to get some notion of how fast the token is being passed from device to
device, and how many thousands of times this happens in just a few minutes. Click the Tail button again
to stop the scrolling and look more carefully at the messages.
Show Diagnostics Only — To filter the messages, click the pull-down list and select Show
diagnostics only or Show data and diagnostics. Because of the continuous token-passing activity
on the link, diagnostics will often reveal a problem.
Trane SerialSpy Protocol Analyzer Software
"Statistics Summary," p. 38
®
MS/TP link.
for details on how this button is used.
for details on how this
®
SC+ or other
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