Linux runtime: overrun detection for real-time timers and for plc execution.
If real-time timer wakes-up PLC thread too late (10% over period), then
warning is logged.
If PLC code (IO retreive, execution, IO publish) takes longer than requested
PLC execution cycle, then warning is logged, and CPU hoogging is mitigated
by delaying next PLC execution a few cylces more until having at least
1ms minimal idle time.
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://www.plcopen.org/xml/tc6.xsd"
xsi:schemaLocation="http://www.plcopen.org/xml/tc6.xsd"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:xhtml="http://www.w3.org/1999/xhtml">
<fileHeader companyName="Unknown"
productName="Unnamed"
productVersion="1"
creationDateTime="2013-01-29T14:01:00"/>
<contentHeader name="Unnamed"
modificationDateTime="2013-02-26T15:59:13">
<coordinateInfo>
<fbd>
<scaling x="0" y="0"/>
</fbd>
<ld>
<scaling x="0" y="0"/>
</ld>
<sfc>
<scaling x="0" y="0"/>
</sfc>
</coordinateInfo>
</contentHeader>
<types>
<dataTypes>
<dataType name="LOGLEVEL">
<baseType>
<enum>
<values>
<value name="CRITICAL"/>
<value name="WARNING"/>
<value name="INFO"/>
<value name="DEBUG"/>
</values>
</enum>
</baseType>
<initialValue>
<simpleValue value="INFO"/>
</initialValue>
</dataType>
</dataTypes>
<pous>
<pou name="LOGGER" pouType="functionBlock">
<interface>
<inputVars>
<variable name="TRIG">
<type>
<BOOL/>
</type>
</variable>
<variable name="MSG">
<type>
<string/>
</type>
</variable>
<variable name="LEVEL">
<type>
<derived name="LOGLEVEL"/>
</type>
<initialValue>
<simpleValue value="INFO"/>
</initialValue>
</variable>
</inputVars>
<localVars>
<variable name="TRIG0">
<type>
<BOOL/>
</type>
</variable>
</localVars>
</interface>
<body>
<ST>
<![CDATA[IF TRIG AND NOT TRIG0 THEN
{{
LogMessage(GetFbVar(LEVEL),(char*)GetFbVar(MSG, .body),GetFbVar(MSG, .len));
}}
END_IF;
TRIG0:=TRIG;
]]>
</ST>
</body>
</pou>
</pous>
</types>
<instances>
<configurations/>
</instances>
</project>