47 lines
1.9 KiB
HTML
47 lines
1.9 KiB
HTML
<HTML>
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<HEAD>
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<TITLE>Chopper Control</TITLE>
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</HEAD>
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<BODY>
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<H1>Chopper Control</H1>
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<P>
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POLDI is equipped with a Dornier Disk Chopper. The SICS program handling
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RS-232 requests at the chopper control computer
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is rather slow. This would slow the SICS server to unacceptable
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levels, if any request would be handled through the RS-232 interface. In order
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to cope with the problem, the SICS server buffers chopper
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information. This information is updated any minute if not set otherwise.
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</p>
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<p>
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The chopper system control is divided into several distinct objects: There
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is the actual chopper controller which mainly serves for answering
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status requests. One virtual motor (chopperspeed) is available which
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represent the modifiable parameter of the disk chopper. The parameter can
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be driven through the normal <a
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href="drive.htm">drive</a> command. The commands understood by the
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chopper controller object are:
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<dl>
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<DT>choco list
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<DD>prints a listing of all known chopper parameters. Parameters phase and ratio are not used.
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<DT>choco <i>name</i>
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<DD>print only the value of parameter name. Possible values for name
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can be extracted from the list printed with choco list (example choco <i>speed</i>).
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</dl>
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The following virtual motor variable exists.
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<dL>
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<DT>chopperspeed
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<DD>disk chopper speed
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</DL>
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The variable <i>chopperspeed</i> kindly prints its current value when given as a command. Modifying the value happens through the normal drive
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command. For instance the command:
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<pre>
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drive chopperspeed 10000
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</pre>
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will drive the disk chopper to 10000 RPM eventually and if no problem occurs.
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Please check your input carefully for all chopper commands.
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Dornier has provided no way to stop an erraneous command in its software. So, if you intend to run the chopper to 1000 RPM and mistyped it as 10000 then
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you'll wait for 20 minutes until the chopper is at speed!
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</p>
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</BODY>
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</HTML>
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