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<HTML>
<HEAD>
<TITLE>FOCUS SPS Commands</TITLE>
</HEAD>
<BODY>
<H1>FOCUS SPS Commands</H1>
<P>
The following commands are handled with the help of the Siemens SPS-system.
</P>
<h2><a name="SHUDDER">The Shutter</a></h2>
<p>
Even the shutter can be controlled from within SICS. This is safe because
the shutter will not open if the door to the instrument is open. In Local
Beam Control (LBC) speak this status is named "Enclosure is broken". Be
careful anyway because some idiots may climb the fence..... The following
SICS commands control the shutter:
<dl>
<DT>shutter
<DD>The command shutter without arguments returns the status of the shutter.
This can be one of open, closed, Enclosure is broken.
<DT>shutter open
<DD>opens the shutter when possible.
<DT>shutter close
<DD>closes the shutter.
</dl>
</p>
<h2><a name="COLLI">The Collimator</a></h2>
<p>
FOCUS is equiped with a rotating collimator. This can be either idle or
moving. This collimator can be controlled from SICS with the following
commands:
<dl>
<dt>colli
<dd>prints the current status of the collimator which can be either
idle or moving.
<dt>colli idle
<dd>switches the collimator to idle mode.
<dt>colli moving
<dd>swicthes the collimator into moving mode.
</dl>
</p>
<h2><a name="FBOX">Flight Box</a></h2>
<p>
The flight path in the detector box is normally filled with argon.
In order to detect a possible
leak an oxygen sensor is provided. The status of this sensor can be inquired
from within SICS with the command:
<dl>
<dt>fbox
<dd>prints the status of the flightbox. Which can be either OK or Problem.
</dl>
Obviously this cannot be controlled from the computer as any problem with
this requires massive mechanical intervention (searching the leak and
refilling argon).
</p>
</BODY>
</HTML>