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merged record-updates branch

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Andrew Johnson
2012-06-22 17:58:12 -05:00
parent 42ebafd6ae bd53941ac4
commit ddc675adc1
30 changed files with 2073 additions and 1166 deletions
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@@ -15,6 +15,40 @@ EPICS Base 3.15.0.x releases are not intended for use in production systems.</p>
<h2 align="center">Changes between 3.14.x and 3.15.0.x</h2>
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<h3>Alarm filtering added to input record types</h3>
<p>The record types ai, calc, longin and mbbi have a new alarm filter added to
them. This provides a low-pass filter that can be used to delay the reporting of
alarms caused by the input level passing the HIGH, HIHI, LOW or LOLO values. The
filter is controlled with a new AFTC field that sets the filter's time constant.
The default value for this field is zero, which keeps the record's original
alarm behaviour.</p>
<p>The record must be scanned often enough for the filtering action to work
effectively and the alarm severity can only change when the record is processed,
but that processing does not have to be regular; the filter uses the time since
the record last processed in its calculation. Setting AFTC to a positive number
of seconds will delay the record going into or out of a minor alarm severity or
from minor to major severity until the input signal has been in that range for
that number of seconds.</p>
<h3>Post events on Waveform record's NORD field</h3>
<p>When the record type or soft device support modify the NORD field of a
waveform record they now also post a DBE_VALUE and DBE_LOG event, signalling the
array length change to any clients monitoring the NORD field. Input device
support routines should be modified to do this as well.</p>
<h3>Attributes of Non-VAL Fields</h3>
<p>Non-VAL fields now report meaningful information for precision, units,
graphic limits, control limits, and alarm limits instead of simply using
PREC, EGU, HOPR, LOPR, DRVL, DRVH, HIHI, HIGH, LOW, and LOLO. All delay
fields have a default precision of 2 digits, units "s" and control limits
of 0 to 100,000 seconds (these precision and limit values can be changed
for each record type as a whole at runtime by updating a registered global
variable). Input fields like A-L of the calc record read their metadata
from the corresponding INPn link if possible.</p>
<h4>epicsStdioRedirect.h merged into epicsStdio.h</h4>
<p>The definitions from the header file epicsStdioRedirect.h have been moved