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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"
"http://www.w3.org/TR/html4/strict.dtd">
<html lang="en">
<head>
<meta name="generator" content=
"HTML Tidy for Mac OS X (vers 31 October 2006 - Apple Inc. build 15.17), see www.w3.org">
<title>JMRI: Speedometer</title><!-- Style -->
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<h1>Speedometer</h1>
<p>The JMRI libraries contain a Speedometer tool that you can
use directly from the screen, or build into your own
applications</p>
<p>Before the tool will report the speed, you need to
configure it.</p>
<p>To do this, enter Sensor numbers in the three fields. This
is a number (like "23") for the DCC address of the BDL16,
DS54, etc. channel that will report when the occupancy
changes. The simplest way to get the right number is to open
a "LocoNet Monitor" window, and drop a locomotive onto the
block you're interested in. You'll see the sensor message,
complete with number, in the window that looks something like
this:</p>
<pre>
General sensor input report: contact 161 (DS54 20 ch1 Sw input)
(BDL16 10 A2) is Lo
</pre>The contact number, 161 in this case, is what you want.
<p>There are three Sensors so you can have a shorter interval
for slow speeds and a longer interval for fast speeds. The
timing is from Sensor 1 to Sensor 2, and from Sensor 1 to
Sensor 3.</p>
<p>You also need to select "on entrance" or "on exit" for
each of the Sensors. This says whether the clock will
start/stop when the Sensor shows the Block is first
"Occupied", or when it shows the Block is first
"Unoccupied".</p>
<p>You also enter the distance in <em>scale</em> feet between
the various points. If you're using "on entrance", measure
using the entrance end of the block.</p>
<p>Finally, click the "Start" button. The three little red
dots along the right side of the Speedometer window will
start changing color to indicate the status of the selected
Sensors:</p>
<ul>
<li>Red for "Unknown", no message seen yet</li>
<li>White for "Unoccupied"</li>
<li>Green or Yellow for "Occupied"</li>
</ul>
<p>Once you click the Start button, you can't change the
configuration. Just close that window and open another one.
You can have multiple Speedometer tool windows open if you'd
like.</p>
<p>Also check out the JMRI Help pages on:</p>
<ul>
<li><a href="SpeedMatch.shtml">Speed Matching</a></li>
<li>The <a href="NCE-Speedometer.shtml">NCE
speedometer</a></li>
<li>The <a href=
"../../hardware/bachrus/index.shtml">Bachrus
speedometer</a></li>
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