PEP8 conformity for modbus. Most of it done by autopep8, plus some easy refactoring.
<?xml version='1.0' encoding='utf-8'?>
<project xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.plcopen.org/xml/tc6_0201" xmlns:xhtml="http://www.w3.org/1999/xhtml" xsi:schemaLocation="http://www.plcopen.org/xml/tc6_0201">
<fileHeader companyName="beremiz" productName="Beremiz" productVersion="0.0" creationDateTime="2008-12-14T16:21:19"/>
<contentHeader name="Beremiz wxHMI test" modificationDateTime="2017-06-05T14:01:40">
<coordinateInfo>
<pageSize x="1024" y="1024"/>
<fbd>
<scaling x="5" y="5"/>
</fbd>
<ld>
<scaling x="5" y="5"/>
</ld>
<sfc>
<scaling x="5" y="5"/>
</sfc>
</coordinateInfo>
</contentHeader>
<types>
<dataTypes/>
<pous>
<pou name="main_pytest" pouType="program">
<interface>
<localVars>
<variable name="getCheckBoxState">
<type>
<derived name="python_poll"/>
</type>
</variable>
<variable name="counter">
<type>
<INT/>
</type>
</variable>
<variable name="setSpinCtrlValue">
<type>
<derived name="python_poll"/>
</type>
</variable>
</localVars>
</interface>
<body>
<FBD>
<block localId="24" width="125" height="90" typeName="python_poll" instanceName="getCheckBoxState" executionOrderId="0">
<position x="480" y="215"/>
<inputVariables>
<variable formalParameter="TRIG">
<connectionPointIn>
<relPosition x="0" y="35"/>
<connection refLocalId="25">
<position x="480" y="250"/>
<position x="420" y="250"/>
</connection>
</connectionPointIn>
</variable>
<variable formalParameter="CODE">
<connectionPointIn>
<relPosition x="0" y="70"/>
<connection refLocalId="26">
<position x="480" y="285"/>
<position x="420" y="285"/>
</connection>
</connectionPointIn>
</variable>
</inputVariables>
<inOutVariables/>
<outputVariables>
<variable formalParameter="ACK">
<connectionPointOut>
<relPosition x="125" y="35"/>
</connectionPointOut>
</variable>
<variable formalParameter="RESULT">
<connectionPointOut>
<relPosition x="125" y="70"/>
</connectionPointOut>
</variable>
</outputVariables>
</block>
<inVariable localId="25" height="30" width="100" executionOrderId="0" negated="false">
<position x="320" y="235"/>
<connectionPointOut>
<relPosition x="100" y="15"/>
</connectionPointOut>
<expression>BOOL#TRUE</expression>
</inVariable>
<inVariable localId="26" height="30" width="400" executionOrderId="0" negated="false">
<position x="20" y="270"/>
<connectionPointOut>
<relPosition x="400" y="15"/>
</connectionPointOut>
<expression>'int(HMIFrame.checkbox_1.GetValue())'</expression>
</inVariable>
<inVariable localId="27" height="30" width="40" executionOrderId="0" negated="false">
<position x="535" y="505"/>
<connectionPointOut>
<relPosition x="40" y="15"/>
</connectionPointOut>
<expression>')'</expression>
</inVariable>
<inVariable localId="28" height="30" width="330" executionOrderId="0" negated="false">
<position x="150" y="415"/>
<connectionPointOut>
<relPosition x="330" y="15"/>
</connectionPointOut>
<expression>'HMIFrame.spin_ctrl_1.SetValue('</expression>
</inVariable>
<block localId="30" width="145" height="85" typeName="STRING_TO_INT" executionOrderId="0">
<position x="670" y="215"/>
<inputVariables>
<variable formalParameter="EN">
<connectionPointIn>
<relPosition x="0" y="35"/>
<connection refLocalId="24" formalParameter="ACK">
<position x="670" y="250"/>
<position x="605" y="250"/>
</connection>
</connectionPointIn>
</variable>
<variable formalParameter="IN">
<connectionPointIn>
<relPosition x="0" y="70"/>
<connection refLocalId="24" formalParameter="RESULT">
<position x="670" y="285"/>
<position x="605" y="285"/>
</connection>
</connectionPointIn>
</variable>
</inputVariables>
<inOutVariables/>
<outputVariables>
<variable formalParameter="ENO">
<connectionPointOut>
<relPosition x="145" y="35"/>
</connectionPointOut>
</variable>
<variable formalParameter="OUT">
<connectionPointOut>
<relPosition x="145" y="70"/>
</connectionPointOut>
</variable>
</outputVariables>
</block>
<block localId="32" width="80" height="80" typeName="ADD" executionOrderId="0">
<position x="135" y="450"/>
<inputVariables>
<variable formalParameter="EN">
<connectionPointIn>
<relPosition x="0" y="30"/>
<connection refLocalId="38" formalParameter="OUT">
<position x="135" y="480"/>
<position x="100" y="480"/>
<position x="100" y="330"/>
<position x="1140" y="330"/>
<position x="1140" y="250"/>
<position x="1130" y="250"/>
</connection>
</connectionPointIn>
</variable>
<variable formalParameter="IN1">
<connectionPointIn>
<relPosition x="0" y="50"/>
<connection refLocalId="39">
<position x="135" y="500"/>
<position x="90" y="500"/>
</connection>
</connectionPointIn>
</variable>
<variable formalParameter="IN2">
<connectionPointIn>
<relPosition x="0" y="70"/>
<connection refLocalId="33">
<position x="135" y="520"/>
<position x="125" y="520"/>
<position x="125" y="540"/>
<position x="340" y="540"/>
<position x="340" y="500"/>
<position x="320" y="500"/>
</connection>
</connectionPointIn>
</variable>
</inputVariables>
<inOutVariables/>
<outputVariables>
<variable formalParameter="ENO">
<connectionPointOut>
<relPosition x="80" y="30"/>
</connectionPointOut>
</variable>
<variable formalParameter="OUT">
<connectionPointOut>
<relPosition x="80" y="50"/>
</connectionPointOut>
</variable>
</outputVariables>
</block>
<block localId="34" width="80" height="100" typeName="CONCAT" executionOrderId="0">
<position x="605" y="430"/>
<inputVariables>
<variable formalParameter="EN">
<connectionPointIn>
<relPosition x="0" y="30"/>
<connection refLocalId="35" formalParameter="ENO">
<position x="605" y="460"/>
<position x="520" y="460"/>
<position x="520" y="480"/>
<position x="500" y="480"/>
</connection>
</connectionPointIn>
</variable>
<variable formalParameter="IN1">
<connectionPointIn>
<relPosition x="0" y="50"/>
<connection refLocalId="28">
<position x="605" y="480"/>
<position x="562" y="480"/>
<position x="562" y="430"/>
<position x="480" y="430"/>
</connection>
</connectionPointIn>
</variable>
<variable formalParameter="IN2">
<connectionPointIn>
<relPosition x="0" y="70"/>
<connection refLocalId="35" formalParameter="OUT">
<position x="605" y="500"/>
<position x="500" y="500"/>
</connection>
</connectionPointIn>
</variable>
<variable formalParameter="IN3">
<connectionPointIn>
<relPosition x="0" y="90"/>
<connection refLocalId="27">
<position x="605" y="520"/>
<position x="575" y="520"/>
</connection>
</connectionPointIn>
</variable>
</inputVariables>
<inOutVariables/>
<outputVariables>
<variable formalParameter="ENO">
<connectionPointOut>
<relPosition x="80" y="30"/>
</connectionPointOut>
</variable>
<variable formalParameter="OUT">
<connectionPointOut>
<relPosition x="80" y="50"/>
</connectionPointOut>
</variable>
</outputVariables>
</block>
<inOutVariable localId="33" height="35" width="85" executionOrderId="0" negatedOut="false" negatedIn="false">
<position x="235" y="485"/>
<connectionPointIn>
<relPosition x="0" y="15"/>
<connection refLocalId="32" formalParameter="OUT">
<position x="235" y="500"/>
<position x="215" y="500"/>
</connection>
</connectionPointIn>
<connectionPointOut>
<relPosition x="85" y="15"/>
</connectionPointOut>
<expression>counter</expression>
</inOutVariable>
<block localId="35" width="145" height="60" typeName="INT_TO_STRING" executionOrderId="0">
<position x="355" y="450"/>
<inputVariables>
<variable formalParameter="EN">
<connectionPointIn>
<relPosition x="0" y="30"/>
<connection refLocalId="32" formalParameter="ENO">
<position x="355" y="480"/>
<position x="215" y="480"/>
</connection>
</connectionPointIn>
</variable>
<variable formalParameter="IN">
<connectionPointIn>
<relPosition x="0" y="50"/>
<connection refLocalId="33">
<position x="355" y="500"/>
<position x="320" y="500"/>
</connection>
</connectionPointIn>
</variable>
</inputVariables>
<inOutVariables/>
<outputVariables>
<variable formalParameter="ENO">
<connectionPointOut>
<relPosition x="145" y="30"/>
</connectionPointOut>
</variable>
<variable formalParameter="OUT">
<connectionPointOut>
<relPosition x="145" y="50"/>
</connectionPointOut>
</variable>
</outputVariables>
</block>
<block localId="36" width="125" height="90" typeName="python_poll" instanceName="setSpinCtrlValue" executionOrderId="0">
<position x="735" y="425"/>
<inputVariables>
<variable formalParameter="TRIG">
<connectionPointIn>
<relPosition x="0" y="35"/>
<connection refLocalId="34" formalParameter="ENO">
<position x="735" y="460"/>
<position x="685" y="460"/>
</connection>
</connectionPointIn>
</variable>
<variable formalParameter="CODE">
<connectionPointIn>
<relPosition x="0" y="70"/>
<connection refLocalId="34" formalParameter="OUT">
<position x="735" y="495"/>
<position x="715" y="495"/>
<position x="715" y="480"/>
<position x="685" y="480"/>
</connection>
</connectionPointIn>
</variable>
</inputVariables>
<inOutVariables/>
<outputVariables>
<variable formalParameter="ACK">
<connectionPointOut>
<relPosition x="125" y="35"/>
</connectionPointOut>
</variable>
<variable formalParameter="RESULT">
<connectionPointOut>
<relPosition x="125" y="70"/>
</connectionPointOut>
</variable>
</outputVariables>
</block>
<block localId="37" width="125" height="45" typeName="INT_TO_BOOL" executionOrderId="0">
<position x="870" y="255"/>
<inputVariables>
<variable formalParameter="IN">
<connectionPointIn>
<relPosition x="0" y="30"/>
<connection refLocalId="30" formalParameter="OUT">
<position x="870" y="285"/>
<position x="815" y="285"/>
</connection>
</connectionPointIn>
</variable>
</inputVariables>
<inOutVariables/>
<outputVariables>
<variable formalParameter="OUT">
<connectionPointOut>
<relPosition x="125" y="30"/>
</connectionPointOut>
</variable>
</outputVariables>
</block>
<block localId="38" width="80" height="95" typeName="AND" executionOrderId="0">
<position x="1050" y="210"/>
<inputVariables>
<variable formalParameter="IN1">
<connectionPointIn>
<relPosition x="0" y="40"/>
<connection refLocalId="30" formalParameter="ENO">
<position x="1050" y="250"/>
<position x="815" y="250"/>
</connection>
</connectionPointIn>
</variable>
<variable formalParameter="IN2">
<connectionPointIn>
<relPosition x="0" y="75"/>
<connection refLocalId="37" formalParameter="OUT">
<position x="1050" y="285"/>
<position x="995" y="285"/>
</connection>
</connectionPointIn>
</variable>
</inputVariables>
<inOutVariables/>
<outputVariables>
<variable formalParameter="OUT">
<connectionPointOut>
<relPosition x="80" y="40"/>
</connectionPointOut>
</variable>
</outputVariables>
</block>
<inVariable localId="39" height="30" width="60" executionOrderId="0" negated="false">
<position x="30" y="485"/>
<connectionPointOut>
<relPosition x="60" y="15"/>
</connectionPointOut>
<expression>INT#1</expression>
</inVariable>
<comment localId="101" height="115" width="680">
<position x="10" y="30"/>
<content>
<xhtml:p><![CDATA[This example shows how IEC program in PLC can interact with UI created using wxGlade.
"WxGlade GUI" is extension to build user interface for PLC using wxGlade.
To edit user interface click on "WxGlade" icon in extension settings.]]></xhtml:p>
</content>
</comment>
</FBD>
</body>
</pou>
</pous>
</types>
<instances>
<configurations>
<configuration name="config">
<resource name="res_pytest">
<task name="pytest_task" interval="t#100ms" priority="0"/>
<pouInstance name="pytest_instance" typeName="main_pytest"/>
</resource>
</configuration>
</configurations>
</instances>
</project>