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<h1>JMRI: RPS Polling Control</h1>
<a href="../../../../../../html/hardware/rps/images/PollControl.gif"><img src=
"../../../../../../html/hardware/rps/images/PollControl.gif" height="80" width="300" alt=
"RPS Receiver Control window" class="floatRight"></a>
<p>The RPS Polling Control window is where you tell the <a href=
"../../../../../../html/hardware/rps/index.shtml">RPS system</a> which of your locomotives
have RPS transmitters installed, and how often to talk to them.</p>
<p>When you open the window, you should see your entire <a href=
"../../../../../../manual/DecoderPro3/Comp_Setup_Roster.shtml">roster of locomotives</a>
displayed, one per line.</p>
<p>If a locomotive has a RPS transmitter installed and you'd like the system to track its
position, check the box in the "Poll" column.</p>
<p>To control whether the system as a whole is polling, check or uncheck the "Poll" box in
the bottom section of the window.</p>
<p>The table has nine columns:</p>
<ul>
<li>"Roster Name" - This is the locomotive decoder name from the roster.</li>
<li>"ID" - The name that RPS uses to refer to this transmitter. By default, it's the same
as the roster name, but you can change it if you'd like.</li>
<li>"Locomotive Address" and "Long" - The DCC address of the decoder. The "Long" box will
be checked if this is a "long" ("extended") address.</li>
<li>"Polled" - Should the RPS system measure this position?</li>
<li>"Last X", "Last Y", "Last Z" - The most recent measured position for this
transmitter.</li>
<li>"Last Time" - The time the last measurement was taken.</li>
</ul>
There are three radio buttons that control how polling is done.
<dl>
<dt>Use BSC Poll</dt>
<dd>When checked, this uses a "Binary State Command" to poll the RPS system. If your RPS
transmitters support this, it is the recommended setting except for with Lenz systems.</dd>
<dt>Use Direct Poll</dt>
<dd>When checked, JMRI sends F2 commands directly on the track. Use this if your RPS
transmitters require F2 polls, and you don't have a Lenz DCC system.</dd>
<dt>Use Throttle Poll</dt>
<dd>When checked, JMRI simulates a throttle to send F2 polls. This is currently required
for Lenz systems, and not recommended for others.</dd>
</dl>
<p>The interval box controls the number of milliseconds between polls. This should not be set
below about 80. If you are polling less than 5 transmitters, set it to 300 or above. This
option will eventually be removed in a later JMRI version, when it becomes automatic.</p>
<p>To save the values so they'll be automatically used when the program is next started,
click "Store New Default Values".</p>
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