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modbus-ng #227

Open diplfranzhoepfinger opened 2 weeks ago

diplfranzhoepfinger commented 2 weeks ago

@mx990 

i wanted to have a look at Modbus-NG. 

https://git.eclipse.org/r/c/4diac/org.eclipse.4diac.forte/+/139743

can you please drop me a E-Mail, or help me here,  i am searching the FBs for Bus, Slave etc..

Thanks many times.

mx990 commented 2 weeks ago

Thank you for your interest in the modbus-ng I/O interface. I was unfortunately unable to locate the original FB type files from back then, but I quickly re-created them for you based on the generated code: https://github.com/eclipse-4diac/4diac-ide/pull/477

The Slave FB types are specific to the respective device, so I did not include them. The slave devices need to be SIFBs with the following interface:

        <EventInputs>
            <Event Name="MAP" Type="Event" Comment="Service Initialization">
                <With Var="QI"/>
<!--                <With Var="<IO Name>"/> -->
                <With Var="Unit"/>
                <With Var="UpdateInterval"/>
            </Event>
        </EventInputs>
        <EventOutputs>
            <Event Name="MAPO" Type="Event" Comment="Initialization Confirm">
                <With Var="QO"/>
                <With Var="STATUS"/>
            </Event>
            <Event Name="IND" Type="Event" Comment="Indication from Resource">
                <With Var="QO"/>
                <With Var="STATUS"/>
            </Event>
        </EventOutputs>
        <InputVars>
            <VarDeclaration Name="QI" Type="BOOL" Comment="Event Input Qualifier"/>
<!--            <VarDeclaration Name="<IO NAME>" Type="WSTRING" Comment="I/O Name"/> -->
            <VarDeclaration Name="Unit" Type="USINT" Comment="Modbus Unit Identifier"/>
            <VarDeclaration Name="UpdateInterval" Type="UINT" Comment="Update Interval"/>
        </InputVars>
        <OutputVars>
            <VarDeclaration Name="QO" Type="BOOL" Comment="Event Output Qualifier"/>
            <VarDeclaration Name="STATUS" Type="WSTRING" Comment="Service Status"/>
        </OutputVars>

The exported code then needs to be adapted to inherit from ModbusSlave and implement the required functionality, see also SlaveFestoCMMP_AS.h and SlaveFestoCMMP_AS.cpp.