Runtime: Fix exception "Worker is disabled" when connecting while PLC runtime is starting.
Pyro/wamp/UI delegate jobs to Worker, causing race condition if worker isn't already started.
Added a function to ensure that Worker is already created when pyro or UI starts
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<xhtml:p><![CDATA[Example shows
- how to use wxGlade extension to create user interface and dynamically extend it using Python,
- how to respond to user actions in PLC program and
- how to use several PLC tasks to handle process of different speeds.
Program has two tasks:
1. Slow task that communicates with user interface created in wxGlade and updates axes state.
2. Main task that drives virtual axes.
When power is on, user can control axes.
"Draw Logo" buttons starts X, Y, Z axes. "Draw Test" buttons starts Z and T axes.
User can adjust position of axes using manual keys.
Happy hacking!]]></xhtml:p>
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<connectionPointOut>
<relPosition x="70" y="35"/>
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</variable>
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<inVariable localId="35" executionOrderId="0" height="30" width="85" negated="false">
<position x="40" y="580"/>
<connectionPointOut>
<relPosition x="85" y="15"/>
</connectionPointOut>
<expression>DrawLogo</expression>
</inVariable>
<comment localId="36" height="45" width="215">
<position x="20" y="670"/>
<content>
<xhtml:p><![CDATA[Control virtual axes.]]></xhtml:p>
</content>
</comment>
<inVariable localId="30" executionOrderId="0" height="30" width="85" negated="false">
<position x="510" y="475"/>
<connectionPointOut>
<relPosition x="85" y="15"/>
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<expression>DrawLogo</expression>
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<block localId="31" typeName="RS" instanceName="DrawLogoDo" executionOrderId="0" height="115" width="55">
<position x="740" y="445"/>
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<variable formalParameter="S">
<connectionPointIn>
<relPosition x="0" y="45"/>
<connection refLocalId="30">
<position x="740" y="490"/>
<position x="595" y="490"/>
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<variable formalParameter="R1">
<connectionPointIn>
<relPosition x="0" y="90"/>
<connection refLocalId="39" formalParameter="OUT">
<position x="740" y="535"/>
<position x="715" y="535"/>
<position x="715" y="560"/>
<position x="690" y="560"/>
</connection>
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</variable>
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<outputVariables>
<variable formalParameter="Q1">
<connectionPointOut>
<relPosition x="55" y="45"/>
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<inVariable localId="32" executionOrderId="0" height="30" width="85" negated="false">
<position x="500" y="545"/>
<connectionPointOut>
<relPosition x="85" y="15"/>
</connectionPointOut>
<expression>Power_OFF</expression>
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<inVariable localId="38" executionOrderId="0" height="30" width="85" negated="false">
<position x="500" y="580"/>
<connectionPointOut>
<relPosition x="85" y="15"/>
</connectionPointOut>
<expression>DrawTest</expression>
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<block localId="39" typeName="OR" executionOrderId="0" height="85" width="70">
<position x="620" y="525"/>
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<variable formalParameter="IN1">
<connectionPointIn>
<relPosition x="0" y="35"/>
<connection refLocalId="32">
<position x="620" y="560"/>
<position x="585" y="560"/>
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<variable formalParameter="IN2">
<connectionPointIn>
<relPosition x="0" y="70"/>
<connection refLocalId="38">
<position x="620" y="595"/>
<position x="585" y="595"/>
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</connectionPointIn>
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<inOutVariables/>
<outputVariables>
<variable formalParameter="OUT">
<connectionPointOut>
<relPosition x="70" y="35"/>
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</variable>
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</block>
<comment localId="34" height="45" width="365">
<position x="15" y="55"/>
<content>
<xhtml:p><![CDATA[Turn on/off power, Power on enables axes control.]]></xhtml:p>
</content>
</comment>
<comment localId="37" height="45" width="550">
<position x="35" y="360"/>
<content>
<xhtml:p><![CDATA[Only one mode can be selected at any time ("Draw Logo" or "Draw Test").]]></xhtml:p>
</content>
</comment>
</FBD>
</body>
<documentation>
<xhtml:p><![CDATA[]]></xhtml:p>
</documentation>
</pou>
<pou name="ReadGUIdata" pouType="program">
<interface>
<localVars>
<variable name="python_poll0">
<type>
<derived name="python_poll"/>
</type>
</variable>
</localVars>
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<body>
<FBD>
<block localId="220" typeName="python_poll" instanceName="python_poll0" executionOrderId="0" height="85" width="104">
<position x="338" y="130"/>
<inputVariables>
<variable formalParameter="TRIG">
<connectionPointIn>
<relPosition x="0" y="35"/>
<connection refLocalId="221">
<position x="338" y="165"/>
<position x="268" y="165"/>
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</connectionPointIn>
</variable>
<variable formalParameter="CODE">
<connectionPointIn>
<relPosition x="0" y="70"/>
<connection refLocalId="222">
<position x="338" y="200"/>
<position x="296" y="200"/>
</connection>
</connectionPointIn>
</variable>
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<inOutVariables/>
<outputVariables>
<variable formalParameter="ACK">
<connectionPointOut>
<relPosition x="104" y="35"/>
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</variable>
<variable formalParameter="RESULT">
<connectionPointOut>
<relPosition x="104" y="70"/>
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<inVariable localId="221" executionOrderId="0" height="30" width="93" negated="false">
<position x="175" y="150"/>
<connectionPointOut>
<relPosition x="93" y="15"/>
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<expression>BOOL#TRUE</expression>
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<inVariable localId="222" executionOrderId="0" height="30" width="186" negated="false">
<position x="110" y="185"/>
<connectionPointOut>
<relPosition x="186" y="15"/>
</connectionPointOut>
<expression>'wxglade_hmi.UpdPos()'</expression>
</inVariable>
<comment localId="296" height="55" width="445">
<position x="35" y="25"/>
<content>
<xhtml:p><![CDATA[This is slow PLC task. It just updates state of axes on HMI.]]></xhtml:p>
</content>
</comment>
</FBD>
</body>
<documentation>
<xhtml:p><![CDATA[]]></xhtml:p>
</documentation>
</pou>
<pou name="Declarations" pouType="program">
<interface>
<localVars>
<variable name="InitValue">
<type>
<DINT/>
</type>
<initialValue>
<simpleValue value="17"/>
</initialValue>
</variable>
<variable name="NotInitializedVariable">
<type>
<DINT/>
</type>
</variable>
<variable name="counter">
<type>
<DINT/>
</type>
</variable>
</localVars>
</interface>
<body>
<FBD>
<inVariable localId="127" executionOrderId="0" height="30" width="82" negated="false">
<position x="60" y="180"/>
<connectionPointOut>
<relPosition x="82" y="15"/>
</connectionPointOut>
<expression>InitValue</expression>
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<outVariable localId="128" executionOrderId="0" height="30" width="235" negated="false">
<position x="180" y="180"/>
<connectionPointIn>
<relPosition x="0" y="15"/>
<connection refLocalId="127">
<position x="180" y="195"/>
<position x="142" y="195"/>
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</connectionPointIn>
<expression>NotInitializedVariable</expression>
</outVariable>
<comment localId="129" height="90" width="395">
<position x="65" y="40"/>
<content>
<xhtml:p><![CDATA[This program called only once at start.
See task configuration in config.resource1.]]></xhtml:p>
</content>
</comment>
<block localId="131" typeName="ADD" executionOrderId="0" height="95" width="70">
<position x="160" y="340"/>
<inputVariables>
<variable formalParameter="IN1">
<connectionPointIn>
<relPosition x="0" y="40"/>
<connection refLocalId="130">
<position x="160" y="380"/>
<position x="125" y="380"/>
<position x="125" y="325"/>
<position x="380" y="325"/>
<position x="380" y="380"/>
<position x="365" y="380"/>
</connection>
</connectionPointIn>
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<variable formalParameter="IN2">
<connectionPointIn>
<relPosition x="0" y="75"/>
<connection refLocalId="1">
<position x="160" y="415"/>
<position x="120" y="415"/>
</connection>
</connectionPointIn>
</variable>
</inputVariables>
<inOutVariables/>
<outputVariables>
<variable formalParameter="OUT">
<connectionPointOut>
<relPosition x="70" y="40"/>
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</variable>
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</block>
<inVariable localId="1" executionOrderId="0" height="35" width="60" negated="false">
<position x="60" y="400"/>
<connectionPointOut>
<relPosition x="60" y="15"/>
</connectionPointOut>
<expression>1</expression>
</inVariable>
<inOutVariable localId="130" executionOrderId="0" height="35" width="90" negatedOut="false" negatedIn="false">
<position x="275" y="365"/>
<connectionPointIn>
<relPosition x="0" y="15"/>
<connection refLocalId="131" formalParameter="OUT">
<position x="275" y="380"/>
<position x="230" y="380"/>
</connection>
</connectionPointIn>
<connectionPointOut>
<relPosition x="90" y="15"/>
</connectionPointOut>
<expression>counter</expression>
</inOutVariable>
<comment localId="2" height="75" width="390">
<position x="70" y="240"/>
<content>
<xhtml:p><![CDATA[Counts how many times the program is called.
Check counter value in debugger.]]></xhtml:p>
</content>
</comment>
</FBD>
</body>
<documentation>
<xhtml:p><![CDATA[]]></xhtml:p>
</documentation>
</pou>
<pou name="clock" pouType="functionBlock">
<interface>
<localVars>
<variable name="TimerOn">
<type>
<derived name="TON"/>
</type>
</variable>
</localVars>
<outputVars>
<variable name="Out">
<type>
<BOOL/>
</type>
</variable>
</outputVars>
<inputVars>
<variable name="Period">
<type>
<TIME/>
</type>
<initialValue>
<simpleValue value="T#3s"/>
</initialValue>
</variable>
</inputVars>
<localVars>
<variable name="TimerOff">
<type>
<derived name="TON"/>
</type>
</variable>
</localVars>
</interface>
<body>
<FBD>
<block localId="14" typeName="TON" instanceName="TimerOn" executionOrderId="0" height="100" width="50">
<position x="260" y="70"/>
<inputVariables>
<variable formalParameter="IN">
<connectionPointIn>
<relPosition x="0" y="40"/>
<connection refLocalId="2" formalParameter="Q">
<position x="260" y="110"/>
<position x="225" y="110"/>
<position x="225" y="10"/>
<position x="550" y="10"/>
<position x="550" y="110"/>
<position x="510" y="110"/>
</connection>
</connectionPointIn>
</variable>
<variable formalParameter="PT">
<connectionPointIn>
<relPosition x="0" y="80"/>
<connection refLocalId="16" formalParameter="OUT">
<position x="260" y="150"/>
<position x="225" y="150"/>
<position x="225" y="255"/>
<position x="190" y="255"/>
</connection>
</connectionPointIn>
</variable>
</inputVariables>
<inOutVariables/>
<outputVariables>
<variable formalParameter="Q">
<connectionPointOut>
<relPosition x="50" y="40"/>
</connectionPointOut>
</variable>
<variable formalParameter="ET">
<connectionPointOut>
<relPosition x="50" y="80"/>
</connectionPointOut>
</variable>
</outputVariables>
</block>
<block localId="2" typeName="TON" instanceName="TimerOff" executionOrderId="0" height="100" width="50">
<position x="460" y="70"/>
<inputVariables>
<variable formalParameter="IN">
<connectionPointIn>
<relPosition x="0" y="40"/>
<connection refLocalId="14" formalParameter="Q">
<position x="460" y="110"/>
<position x="310" y="110"/>
</connection>
</connectionPointIn>
</variable>
<variable formalParameter="PT">
<connectionPointIn>
<relPosition x="0" y="80"/>
<connection refLocalId="16" formalParameter="OUT">
<position x="460" y="150"/>
<position x="350" y="150"/>
<position x="350" y="255"/>
<position x="190" y="255"/>
</connection>
</connectionPointIn>
</variable>
</inputVariables>
<inOutVariables/>
<outputVariables>
<variable formalParameter="Q" negated="true">
<connectionPointOut>
<relPosition x="50" y="40"/>
</connectionPointOut>
</variable>
<variable formalParameter="ET">
<connectionPointOut>
<relPosition x="50" y="80"/>
</connectionPointOut>
</variable>
</outputVariables>
</block>
<outVariable localId="15" executionOrderId="0" height="35" width="35" negated="false">
<position x="365" y="25"/>
<connectionPointIn>
<relPosition x="0" y="15"/>
<connection refLocalId="14" formalParameter="Q">
<position x="365" y="40"/>
<position x="340" y="40"/>
<position x="340" y="110"/>
<position x="310" y="110"/>
</connection>
</connectionPointIn>
<expression>Out</expression>
</outVariable>
<block localId="16" typeName="DIV" executionOrderId="0" height="95" width="70">
<position x="120" y="215"/>
<inputVariables>
<variable formalParameter="IN1">
<connectionPointIn>
<relPosition x="0" y="40"/>
<connection refLocalId="1">
<position x="120" y="255"/>
<position x="78" y="255"/>
</connection>
</connectionPointIn>
</variable>
<variable formalParameter="IN2">
<connectionPointIn>
<relPosition x="0" y="75"/>
<connection refLocalId="4">
<position x="120" y="290"/>
<position x="75" y="290"/>
</connection>
</connectionPointIn>
</variable>
</inputVariables>
<inOutVariables/>
<outputVariables>
<variable formalParameter="OUT">
<connectionPointOut>
<relPosition x="70" y="40"/>
</connectionPointOut>
</variable>
</outputVariables>
</block>
<inVariable localId="1" executionOrderId="0" height="30" width="58" negated="false">
<position x="20" y="240"/>
<connectionPointOut>
<relPosition x="58" y="15"/>
</connectionPointOut>
<expression>Period</expression>
</inVariable>
<inVariable localId="4" executionOrderId="0" height="30" width="55" negated="false">
<position x="20" y="275"/>
<connectionPointOut>
<relPosition x="55" y="15"/>
</connectionPointOut>
<expression>2</expression>
</inVariable>
</FBD>
</body>
</pou>
<pou name="axis" pouType="functionBlock">
<interface>
<inputVars>
<variable name="Power">
<type>
<BOOL/>
</type>
</variable>
<variable name="Up">
<type>
<BOOL/>
</type>
</variable>
<variable name="Down">
<type>
<BOOL/>
</type>
</variable>
</inputVars>
<outputVars>
<variable name="Out">
<type>
<INT/>
</type>
</variable>
</outputVars>
<localVars>
<variable name="axis_conuter">
<type>
<derived name="CTUD"/>
</type>
</variable>
<variable name="clock0">
<type>
<derived name="clock"/>
</type>
</variable>
</localVars>
</interface>
<body>
<FBD>
<block localId="297" typeName="CTUD" instanceName="axis_conuter" executionOrderId="0" height="310" width="70">
<position x="645" y="30"/>
<inputVariables>
<variable formalParameter="CU" edge="rising">
<connectionPointIn>
<relPosition x="0" y="50"/>
<connection refLocalId="303" formalParameter="OUT">
<position x="645" y="80"/>
<position x="580" y="80"/>
</connection>
</connectionPointIn>
</variable>
<variable formalParameter="CD" edge="rising">
<connectionPointIn>
<relPosition x="0" y="105"/>
<connection refLocalId="2" formalParameter="OUT">
<position x="645" y="135"/>
<position x="612" y="135"/>
<position x="612" y="150"/>
<position x="580" y="150"/>
</connection>
</connectionPointIn>
</variable>
<variable formalParameter="R">
<connectionPointIn>
<relPosition x="0" y="165"/>
</connectionPointIn>
</variable>
<variable formalParameter="LD">
<connectionPointIn>
<relPosition x="0" y="225"/>
</connectionPointIn>
</variable>
<variable formalParameter="PV">
<connectionPointIn>
<relPosition x="0" y="280"/>
<connection refLocalId="3">
<position x="645" y="310"/>
<position x="610" y="310"/>
</connection>
</connectionPointIn>
</variable>
</inputVariables>
<inOutVariables/>
<outputVariables>
<variable formalParameter="QU">
<connectionPointOut>
<relPosition x="70" y="50"/>
</connectionPointOut>
</variable>
<variable formalParameter="QD">
<connectionPointOut>
<relPosition x="70" y="105"/>
</connectionPointOut>
</variable>
<variable formalParameter="CV">
<connectionPointOut>
<relPosition x="70" y="165"/>
</connectionPointOut>
</variable>
<variable formalParameter="CD_T">
<connectionPointOut>
<relPosition x="70" y="225"/>
</connectionPointOut>
</variable>
<variable formalParameter="CU_T">
<connectionPointOut>
<relPosition x="70" y="280"/>
</connectionPointOut>
</variable>
</outputVariables>
</block>
<outVariable localId="298" executionOrderId="0" height="35" width="35" negated="false">
<position x="750" y="180"/>
<connectionPointIn>
<relPosition x="0" y="15"/>
<connection refLocalId="297" formalParameter="CV">
<position x="750" y="195"/>
<position x="715" y="195"/>
</connection>
</connectionPointIn>
<expression>Out</expression>
</outVariable>
<block localId="299" typeName="clock" instanceName="clock0" executionOrderId="0" height="70" width="87">
<position x="165" y="270"/>
<inputVariables>
<variable formalParameter="Period">
<connectionPointIn>
<relPosition x="0" y="45"/>
<connection refLocalId="1">
<position x="165" y="315"/>
<position x="110" y="315"/>
</connection>
</connectionPointIn>
</variable>
</inputVariables>
<inOutVariables/>
<outputVariables>
<variable formalParameter="Out">
<connectionPointOut>
<relPosition x="87" y="45"/>
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</variable>
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<inVariable localId="300" executionOrderId="0" height="35" width="55" negated="false">
<position x="35" y="205"/>
<connectionPointOut>
<relPosition x="55" y="15"/>
</connectionPointOut>
<expression>Power</expression>
</inVariable>
<inVariable localId="1" executionOrderId="0" height="35" width="75" negated="false">
<position x="35" y="300"/>
<connectionPointOut>
<relPosition x="75" y="15"/>
</connectionPointOut>
<expression>T#100ms</expression>
</inVariable>
<inVariable localId="301" executionOrderId="0" height="35" width="55" negated="false">
<position x="340" y="85"/>
<connectionPointOut>
<relPosition x="55" y="15"/>
</connectionPointOut>
<expression>Up</expression>
</inVariable>
<inVariable localId="302" executionOrderId="0" height="35" width="50" negated="false">
<position x="340" y="155"/>
<connectionPointOut>
<relPosition x="50" y="15"/>
</connectionPointOut>
<expression>Down</expression>
</inVariable>
<block localId="303" typeName="AND" executionOrderId="0" height="60" width="110">
<position x="470" y="50"/>
<inputVariables>
<variable formalParameter="IN1">
<connectionPointIn>
<relPosition x="0" y="30"/>
<connection refLocalId="4" formalParameter="OUT">
<position x="470" y="80"/>
<position x="432" y="80"/>
<position x="432" y="275"/>
<position x="395" y="275"/>
</connection>
</connectionPointIn>
</variable>
<variable formalParameter="IN2">
<connectionPointIn>
<relPosition x="0" y="50"/>
<connection refLocalId="301">
<position x="470" y="100"/>
<position x="395" y="100"/>
</connection>
</connectionPointIn>
</variable>
</inputVariables>
<inOutVariables/>
<outputVariables>
<variable formalParameter="OUT">
<connectionPointOut>
<relPosition x="110" y="30"/>
</connectionPointOut>
</variable>
</outputVariables>
</block>
<block localId="2" typeName="AND" executionOrderId="0" height="60" width="110">
<position x="470" y="120"/>
<inputVariables>
<variable formalParameter="IN1">
<connectionPointIn>
<relPosition x="0" y="30"/>
<connection refLocalId="4" formalParameter="OUT">
<position x="470" y="150"/>
<position x="432" y="150"/>
<position x="432" y="275"/>
<position x="395" y="275"/>
</connection>
</connectionPointIn>
</variable>
<variable formalParameter="IN2">
<connectionPointIn>
<relPosition x="0" y="50"/>
<connection refLocalId="302">
<position x="470" y="170"/>
<position x="390" y="170"/>
</connection>
</connectionPointIn>
</variable>
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<inOutVariables/>
<outputVariables>
<variable formalParameter="OUT">
<connectionPointOut>
<relPosition x="110" y="30"/>
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<inVariable localId="3" executionOrderId="0" height="35" width="85" negated="false">
<position x="525" y="295"/>
<connectionPointOut>
<relPosition x="85" y="15"/>
</connectionPointOut>
<expression>INT#32767</expression>
</inVariable>
<block localId="4" typeName="AND" executionOrderId="0" height="100" width="110">
<position x="285" y="235"/>
<inputVariables>
<variable formalParameter="IN1">
<connectionPointIn>
<relPosition x="0" y="40"/>
<connection refLocalId="300">
<position x="285" y="275"/>
<position x="265" y="275"/>
<position x="265" y="220"/>
<position x="90" y="220"/>
</connection>
</connectionPointIn>
</variable>
<variable formalParameter="IN2">
<connectionPointIn>
<relPosition x="0" y="80"/>
<connection refLocalId="299" formalParameter="Out">
<position x="285" y="315"/>
<position x="250" y="315"/>
</connection>
</connectionPointIn>
</variable>
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<inOutVariables/>
<outputVariables>
<variable formalParameter="OUT">
<connectionPointOut>
<relPosition x="110" y="40"/>
</connectionPointOut>
</variable>
</outputVariables>
</block>
</FBD>
</body>
</pou>
</pous>
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<configurations>
<configuration name="config">
<resource name="resource1">
<task name="InitOneShot" priority="0" single="Initialize">
<pouInstance name="Initializer" typeName="Declarations"/>
</task>
<task name="ControlTask" priority="1" interval="T#2ms">
<pouInstance name="MainInstance" typeName="main"/>
</task>
<task name="GUIupdate" priority="0" interval="T#200ms">
<pouInstance name="PosReader" typeName="ReadGUIdata"/>
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<variable name="Initialize">
<type>
<BOOL/>
</type>
<initialValue>
<simpleValue value="TRUE"/>
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</resource>
</configuration>
</configurations>
</instances>
</project>