clear variable location cell in variable panel, if variable class or type changed
if variable class is not local or global, or variable type is not locatable, variable location cell would be empty and read-only
<?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>