Update the initial documentation to normal Pod syntax
This commit is contained in:
Andrew Johnson
committed by
Ralph Lange
Ralph Lange
parent
29a9ad3f90
commit
d2d40b901a
@@ -1,137 +1,141 @@
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#=head1 Channel Filters
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#
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# Channel Filters can be applied to Channel Access channels by a client, using
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# a JSON Field Modifier to select the filter and any parameters.
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# The following filters are available in this release:
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#
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#=over 4
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#
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#=item * L<TimeStamp|/"TimeStamp Filter "ts"">
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#
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#=item * L<Deadband|/"Deadband Filter "dbnd"">
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#
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#=item * L<Array|/"Array Filter "arr"">
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#
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#=item * L<Synchronize|/"Synchronize Filter "sync"">
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#
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#=back
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#
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#=head2 Using Filters
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#
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# Channel filters can be added to any Channel Access channel name.
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# There can be more than one filter applied to the same channel, in which case the
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# order that they are specified will control the order in which they are applied
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# to the resulting data-stream.
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# The filter specification must appear after the field name, or if the default
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# (VAL) field is used after a dot C<.> appended to the record name.
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# With the exception of the array short-hand which is described below, all filters
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# must appear inside a pair of braces C< {} > after the dot expressed as a JSON
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# (L<JavaScript Object Notation|http://www.json.org/>) object, which allows filter
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# parameters to be included as needed.
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#
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# Each filter is given as a name/value pair. The filter name (given in parentheses
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# in the titles below) is a string, and must be enclosed inside double-quotes C<">
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# characters as per the JSON specification.
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# Parameters to that filter are provided as the value part of the name/value pair,
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# and will normally appear as a child JSON object consisting of name/value pairs
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# inside a nested pair of braces C< {} >.
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#
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#=head4 Example Filter
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#
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# Given a record called C<test:channel> the following would apply a filter C<f> to
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# the VAL field of that record, giving the filter two numeric parameters named C<lo>
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# and C<hi>:
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#
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# test:channel.{"f":{"lo":0,"hi":10}}
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#
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# Note that due to the required presence of the double-quote characters in the JSON
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# strings in the name string, it will usually be necessary to enclose a filtered name
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# within single-quotes C<< ' E<hellip> ' >> when typing it as an argument to a Unix
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# shell command.
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#
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#=head2 Filter Reference
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#
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=head1 Channel Filters
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Channel Filters can be applied to Channel Access channels by a client, using
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a JSON Field Modifier to select the filter and any parameters.
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The following filters are available in this release:
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=over 4
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=item * L<TimeStamp|/"TimeStamp Filter "ts"">
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=item * L<Deadband|/"Deadband Filter "dbnd"">
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=item * L<Array|/"Array Filter "arr"">
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=item * L<Synchronize|/"Synchronize Filter "sync"">
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=back
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=head2 Using Filters
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Channel filters can be added to any Channel Access channel name.
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There can be more than one filter applied to the same channel, in which case the
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order that they are specified will control the order in which they are applied
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to the resulting data-stream.
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The filter specification must appear after the field name, or if the default
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(VAL) field is used after a dot C<.> appended to the record name.
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With the exception of the array short-hand which is described below, all filters
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must appear inside a pair of braces C< {} > after the dot expressed as a JSON
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(L<JavaScript Object Notation|http://www.json.org/>) object, which allows filter
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parameters to be included as needed.
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Each filter is given as a name/value pair. The filter name (given in parentheses
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in the titles below) is a string, and must be enclosed inside double-quotes C<">
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characters as per the JSON specification.
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Parameters to that filter are provided as the value part of the name/value pair,
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and will normally appear as a child JSON object consisting of name/value pairs
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inside a nested pair of braces C< {} >.
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=head4 Example Filter
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Given a record called C<test:channel> the following would apply a filter C<f> to
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the VAL field of that record, giving the filter two numeric parameters named
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C<lo> and C<hi>:
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test:channel.{"f":{"lo":0,"hi":10}}
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Note that due to the required presence of the double-quote characters in the
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JSON strings in the name string, it will usually be necessary to enclose a
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filtered name within single-quotes C<< ' E<hellip> ' >> when typing it as an
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argument to a Unix shell command.
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=head2 Filter Reference
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=cut
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registrar(tsInitialize)
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#=head3 TimeStamp Filter C<"ts">
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#
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# This filter is used to set the timestamp of the (first) value fetched through the
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# channel to the connection time, rather than the time the record last processed
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# which could have been days or even weeks ago for some records, or set to the
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# EPICS epoch if the record has never processed.
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#
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#=head4 Parameters
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#
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# None, use an empty pair of braces.
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#
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#=head4 Example
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#
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# Hal$ caget -a 'test:channel.{"ts":{}}'
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# test:channel.{"ts":{}} 2012-08-28 22:10:31.192547 0 UDF INVALID
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# Hal$ caget -a 'test:channel'
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# test:channel <undefined> 0 UDF INVALID
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#
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=head3 TimeStamp Filter C<"ts">
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This filter is used to set the timestamp of the (first) value fetched through
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the channel to the connection time, rather than the time the record last
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processed which could have been days or even weeks ago for some records, or set
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to the EPICS epoch if the record has never processed.
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=head4 Parameters
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None, use an empty pair of braces.
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=head4 Example
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Hal$ caget -a 'test:channel.{"ts":{}}'
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test:channel.{"ts":{}} 2012-08-28 22:10:31.192547 0 UDF INVALID
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Hal$ caget -a 'test:channel'
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test:channel <undefined> 0 UDF INVALID
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=cut
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registrar(dbndInitialize)
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#=head3 Deadband Filter C<"dbnd">
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#
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# This filter implements a channel-specific monitor deadband, which is applied
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# after any deadbands implemented by the record itself (it can only drop updates
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# that the unfiltered channel generates, never add additional updates).
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#
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# The deadband can be specified as an absolute value change, or as a relative
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# percentage.
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#
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#=head4 Parameters
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#
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#=over 4
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#
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#=item Deadband C<"d">
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#
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# The size of the deadband to use.
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# Relative deadband values are given as a numeric percentage, but without any
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# trailing percent character.
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#
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#=item Mode C<"m"> (optional)
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#
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# A string (enclosed in double-quotes C<">), which should contain either
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# C<abs> or C<rel>.
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# The default mode is absolute if no mode parameter is included.
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#
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#=back
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#
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#=head4 Example
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#
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# Hal$ camonitor 'test:channel'
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# test:channel 2012-09-01 22:10:19.600595 1 LOLO MAJOR
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# test:channel 2012-09-01 22:10:20.600661 2 LOLO MAJOR
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# test:channel 2012-09-01 22:10:21.600819 3 LOW MINOR
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# test:channel 2012-09-01 22:10:22.600905 4 LOW MINOR
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# test:channel 2012-09-01 22:10:23.601023 5
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# test:channel 2012-09-01 22:10:24.601136 6 HIGH MINOR
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# ^C
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# Hal$ camonitor 'test:channel.{"dbnd":{"d":1.5}}'
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# test:channel.{"dbnd":{"d":1.5}} 2012-09-01 22:11:49.613341 1 LOLO MAJOR
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# test:channel.{"dbnd":{"d":1.5}} 2012-09-01 22:11:51.613615 3 LOW MINOR
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# test:channel.{"dbnd":{"d":1.5}} 2012-09-01 22:11:53.613804 5
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# test:channel.{"dbnd":{"d":1.5}} 2012-09-01 22:11:55.614074 7 HIGH MINOR
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# test:channel.{"dbnd":{"d":1.5}} 2012-09-01 22:11:57.614305 9 HIHI MAJOR
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# ^C
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#
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=head3 Deadband Filter C<"dbnd">
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This filter implements a channel-specific monitor deadband, which is applied
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after any deadbands implemented by the record itself (it can only drop updates
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that the unfiltered channel generates, never add additional updates).
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The deadband can be specified as an absolute value change, or as a relative
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percentage.
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=head4 Parameters
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=over 4
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=item Deadband C<"d">
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The size of the deadband to use.
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Relative deadband values are given as a numeric percentage, but without any
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trailing percent character.
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=item Mode C<"m"> (optional)
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A string (enclosed in double-quotes C<">), which should contain either
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C<abs> or C<rel>.
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The default mode is absolute if no mode parameter is included.
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=back
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=head4 Example
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Hal$ camonitor 'test:channel'
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test:channel 2012-09-01 22:10:19.600595 1 LOLO MAJOR
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test:channel 2012-09-01 22:10:20.600661 2 LOLO MAJOR
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test:channel 2012-09-01 22:10:21.600819 3 LOW MINOR
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test:channel 2012-09-01 22:10:22.600905 4 LOW MINOR
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test:channel 2012-09-01 22:10:23.601023 5
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test:channel 2012-09-01 22:10:24.601136 6 HIGH MINOR
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^C
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Hal$ camonitor 'test:channel.{"dbnd":{"d":1.5}}'
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test:channel.{"dbnd":{"d":1.5}} 2012-09-01 22:11:49.613341 1 LOLO MAJOR
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test:channel.{"dbnd":{"d":1.5}} 2012-09-01 22:11:51.613615 3 LOW MINOR
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test:channel.{"dbnd":{"d":1.5}} 2012-09-01 22:11:53.613804 5
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test:channel.{"dbnd":{"d":1.5}} 2012-09-01 22:11:55.614074 7 HIGH MINOR
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test:channel.{"dbnd":{"d":1.5}} 2012-09-01 22:11:57.614305 9 HIHI MAJOR
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^C
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=cut
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registrar(arrInitialize)
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#=head3 Array Filter C<"arr">
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#
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# ...
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#
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=head3 Array Filter C<"arr">
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...
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=cut
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registrar(syncInitialize)
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#=head3 Synchronize Filter C<"sync">
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#
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# ...
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#
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=head3 Synchronize Filter C<"sync">
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...
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=cut
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@@ -7,149 +7,151 @@
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# in file LICENSE that is included with this distribution.
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#*************************************************************************
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recordtype(ai) {
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#=head1 Analog Input (ai)
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#
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# This record type is normally used to obtain an analog value from
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# a hardware input and convert it to engineering units. The record
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# supports linear and break-point conversion to engineering units,
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# smoothing, alarm limits, alarm filtering, and graphics and control
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# limits.
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#
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#=head2 Parameter Fields
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#
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# The record fields are described below grouped by functionality.
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#
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#=head3 Input Specification
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#
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# These fields control where (if anywhere) the record reads data from
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# when it is processed:
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#
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#=fields INP, DTYP
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#
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# I<Description?>
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#
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#=head3 Units Conversion
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#
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# These fields control how the raw input value gets converted into
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# engineering units:
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#
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#=fields RVAL, ROFF, ASLO, AOFF, LINR, ESLO, EOFF, EGUL, EGUF
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#
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# These fields are not used if the device support layer reads its
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# value in engineering units and puts it directly into the VAL field.
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#
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# If the device support sets the RVAL field, the LINR field controls
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# how this gets converted into engineering units and placed in the
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# VAL field as follows:
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#
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#=over 4
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#
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#=item 1. RVAL is converted to a double and ROFF is added to it
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#
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#=item 2. If ASLO is non-zero the value is multiplied by ASLO
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#
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#=item 3. AOFF is added
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#
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#=item 4. If LINR is C<NO CONVERSION> the units conversion is finished
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# after the above steps
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#
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#=item 5. If LINR is C<LINEAR> or C<SLOPE>, the value from step 3
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# above is multiplied by ESLO and EOFF is added to complete the units
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# conversion process
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#
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#=item 6. Any other value for LINR selects a particular breakpoint
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# table to be used on the value from step 3 above
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#
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#=back
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#
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# The distinction between the C<LINEAR> and C<SLOPE> settings for the
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# LINR field are in how the conversion parameters are calculated:
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#
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#=over 4
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#
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#=item *
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# With C<LINEAR> conversion the user must set EGUL and EGUF to the
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# lowest and highest possible engineering units values respectively
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# that can be converted by the hardware. The device support knows
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# the range of the raw data and calculates ESLO and EOFF from them.
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#
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#=item *
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# C<SLOPE> conversion requires the user to calculate the appropriate
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# scaling and offset factors and put them directly in ESLO and EOFF.
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#
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#=back
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#
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#=head3 Smoothing Filter
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#
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# This filter is usually only used if the device support sets the RVAL
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# field and the Units Conversion process is used. Device support that
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# directly sets the VAL field may implement the filter if desired.
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#
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# The filter is controlled with a single parameter field:
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#
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#=fields SMOO
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#
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# The SMOO field should be set to a number between 0 and 1. If set to
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# zero the filter is not used (no smoothing), while if set to one the
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# result is infinite smoothing (the VAL field will never change). The
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# calculation performed is:
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#
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# VAL = VAL * SMOO + (1 - SMOO) * New Data
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#
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# where C<New Data> was the result from the Units Conversion above.
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# This implements a first-order infinite impulse response (IIR)
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# digital filter with z-plane pole at SMOO. The equivalent
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# continuous-time filter time constant E<tau> is given by
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#
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#=over 4
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#
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# E<tau> = E<minus>T / ln(SMOO)
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#
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#=back
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#
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# where T is the time between record processing.
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#
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#=head3 Undefined Check
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#
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# If after applying the smoothing filter the VAL field contains a NaN
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# (Not-a-Number) value, the UDF field is set to indicate that the
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# record value is undefined, which triggers a C<UDF_ALARM> with
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# severity C<INVALID_ALARM>.
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#
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#=fields UDF
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#
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#=head3 Operator Display Parameters
|
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#
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# These parameters are used to present meaningful data to the operator.
|
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#
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#=over 4
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#
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#=item *
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# DESC is a string that is usually used to briefly describe the record.
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#
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#=item *
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# EGU is a string of up to 16 characters giving the units that the
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# analog input measures.
|
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#
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#=item *
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# The HOPR and LOPR fields set the upper and lower display limits for
|
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# the VAL, HIHI, HIGH, LOW, and LOLO fields.
|
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#
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#=item *
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# The PREC field determines the floating point precision with which
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# to display VAL.
|
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#
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#=back
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||||
#
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#=fields DESC, EGU, HOPR, LOPR, PREC
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#
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#=head3 Alarm Parameters
|
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#
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# ...
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#
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#=fields HIHI, HIGH, LOW, LOLO, HHSV, HSV, LSV, LLSV, HYST, AFTC
|
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#
|
||||
#=cut
|
||||
|
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=head1 Analog Input (ai)
|
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|
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This record type is normally used to obtain an analog value from
|
||||
a hardware input and convert it to engineering units. The record
|
||||
supports linear and break-point conversion to engineering units,
|
||||
smoothing, alarm limits, alarm filtering, and graphics and control
|
||||
limits.
|
||||
|
||||
=head2 Parameter Fields
|
||||
|
||||
The record fields are described below grouped by functionality.
|
||||
|
||||
=head3 Input Specification
|
||||
|
||||
These fields control where (if anywhere) the record reads data from
|
||||
when it is processed:
|
||||
|
||||
=fields INP, DTYP
|
||||
|
||||
I<Description?>
|
||||
|
||||
=head3 Units Conversion
|
||||
|
||||
These fields control how the raw input value gets converted into
|
||||
engineering units:
|
||||
|
||||
=fields RVAL, ROFF, ASLO, AOFF, LINR, ESLO, EOFF, EGUL, EGUF
|
||||
|
||||
These fields are not used if the device support layer reads its
|
||||
value in engineering units and puts it directly into the VAL field.
|
||||
|
||||
If the device support sets the RVAL field, the LINR field controls
|
||||
how this gets converted into engineering units and placed in the
|
||||
VAL field as follows:
|
||||
|
||||
=over 4
|
||||
|
||||
=item 1. RVAL is converted to a double and ROFF is added to it
|
||||
|
||||
=item 2. If ASLO is non-zero the value is multiplied by ASLO
|
||||
|
||||
=item 3. AOFF is added
|
||||
|
||||
=item 4. If LINR is C<NO CONVERSION> the units conversion is finished
|
||||
after the above steps
|
||||
|
||||
=item 5. If LINR is C<LINEAR> or C<SLOPE>, the value from step 3
|
||||
above is multiplied by ESLO and EOFF is added to complete the units
|
||||
conversion process
|
||||
|
||||
=item 6. Any other value for LINR selects a particular breakpoint
|
||||
table to be used on the value from step 3 above
|
||||
|
||||
=back
|
||||
|
||||
The distinction between the C<LINEAR> and C<SLOPE> settings for the
|
||||
LINR field are in how the conversion parameters are calculated:
|
||||
|
||||
=over 4
|
||||
|
||||
=item *
|
||||
With C<LINEAR> conversion the user must set EGUL and EGUF to the
|
||||
lowest and highest possible engineering units values respectively
|
||||
that can be converted by the hardware. The device support knows
|
||||
the range of the raw data and calculates ESLO and EOFF from them.
|
||||
|
||||
=item *
|
||||
C<SLOPE> conversion requires the user to calculate the appropriate
|
||||
scaling and offset factors and put them directly in ESLO and EOFF.
|
||||
|
||||
=back
|
||||
|
||||
=head3 Smoothing Filter
|
||||
|
||||
This filter is usually only used if the device support sets the RVAL
|
||||
field and the Units Conversion process is used. Device support that
|
||||
directly sets the VAL field may implement the filter if desired.
|
||||
|
||||
The filter is controlled with a single parameter field:
|
||||
|
||||
=fields SMOO
|
||||
|
||||
The SMOO field should be set to a number between 0 and 1. If set to
|
||||
zero the filter is not used (no smoothing), while if set to one the
|
||||
result is infinite smoothing (the VAL field will never change). The
|
||||
calculation performed is:
|
||||
|
||||
VAL = VAL * SMOO + (1 - SMOO) * New Data
|
||||
|
||||
where C<New Data> was the result from the Units Conversion above.
|
||||
This implements a first-order infinite impulse response (IIR)
|
||||
digital filter with z-plane pole at SMOO. The equivalent
|
||||
continuous-time filter time constant E<tau> is given by
|
||||
|
||||
=over 4
|
||||
|
||||
E<tau> = E<minus>T / ln(SMOO)
|
||||
|
||||
=back
|
||||
|
||||
where T is the time between record processing.
|
||||
|
||||
=head3 Undefined Check
|
||||
|
||||
If after applying the smoothing filter the VAL field contains a NaN
|
||||
(Not-a-Number) value, the UDF field is set to indicate that the
|
||||
record value is undefined, which triggers a C<UDF_ALARM> with
|
||||
severity C<INVALID_ALARM>.
|
||||
|
||||
=fields UDF
|
||||
|
||||
=head3 Operator Display Parameters
|
||||
|
||||
These parameters are used to present meaningful data to the operator.
|
||||
|
||||
=over 4
|
||||
|
||||
=item *
|
||||
DESC is a string that is usually used to briefly describe the record.
|
||||
|
||||
=item *
|
||||
EGU is a string of up to 16 characters giving the units that the
|
||||
analog input measures.
|
||||
|
||||
=item *
|
||||
The HOPR and LOPR fields set the upper and lower display limits for
|
||||
the VAL, HIHI, HIGH, LOW, and LOLO fields.
|
||||
|
||||
=item *
|
||||
The PREC field determines the floating point precision with which
|
||||
to display VAL.
|
||||
|
||||
=back
|
||||
|
||||
=fields DESC, EGU, HOPR, LOPR, PREC
|
||||
|
||||
=head3 Alarm Parameters
|
||||
|
||||
...
|
||||
|
||||
=fields HIHI, HIGH, LOW, LOLO, HHSV, HSV, LSV, LLSV, HYST, AFTC
|
||||
|
||||
=cut
|
||||
|
||||
include "dbCommon.dbd"
|
||||
field(VAL,DBF_DOUBLE) {
|
||||
prompt("Current EGU Value")
|
||||
|
||||
@@ -3,8 +3,7 @@
|
||||
# National Laboratory.
|
||||
# Copyright (c) 2002 The Regents of the University of California, as
|
||||
# Operator of Los Alamos National Laboratory.
|
||||
# EPICS BASE Versions 3.13.7
|
||||
# and higher are distributed subject to a Software License Agreement found
|
||||
# EPICS BASE is distributed subject to a Software License Agreement found
|
||||
# in file LICENSE that is included with this distribution.
|
||||
#*************************************************************************
|
||||
menu(compressALG) {
|
||||
@@ -16,11 +15,13 @@ menu(compressALG) {
|
||||
choice(compressALG_N_to_1_Median,"N to 1 Median")
|
||||
}
|
||||
recordtype(compress) {
|
||||
#=head1 Compress Record (compress)
|
||||
#
|
||||
#=fields VAL
|
||||
#
|
||||
#=cut
|
||||
|
||||
=head1 Compress Record (compress)
|
||||
|
||||
=fields VAL
|
||||
|
||||
=cut
|
||||
|
||||
include "dbCommon.dbd"
|
||||
field(VAL,DBF_NOACCESS) {
|
||||
prompt("Value")
|
||||
|
||||
Reference in New Issue
Block a user