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AVEVA™ Plant SCADA

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Calculator Examples

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  • Last UpdatedJul 18, 2023
  • 3 minute read

The following examples demonstrate five cases where the calculator function could be applied to an equipment XML template. In each case, you need to add an additional line to the XML template:

<calculator>{parameter} + 1</calculator>

  1. Calculator based on string parameter in the input section of the XML. This is only recommended if the calculated parameter is constant for each instance of equipment for this type; however, this is not a typical scenario.

    <string name="MyString">1000</string>

    <calculator name="MyCalc">{MyString} + 1</calculator>

    See Example 1.

  2. Calculator based on equipment field, for example, {equipment.Custom1}.

    <calculator name="MyCalc">{equipment.Custom1} + 1</calculator>

    See Example 2.

  3. Calculator based on ungrouped parameter (defined in Equipment Editor).

    <calculator name="MyCalc">{equipment.param_list[Param1]} + 1</calculator>

    See Example 3.

  4. Calculator based on grouped parameter (defined in Equipment Editor).

    <calculator name="MyCalc">{equipment.ParamGroup[Param2]} + 1</calculator>

    These can then be used in fields for an element:

    <field name="addr">MW_{MyCalc}_2</field>

    See Example 3.

  5. Calculator based on grouped parameter (in the output section).

    <output name="Element" file="variable.dbf" filter="'{equipment.type}={type.name}'">
    <calculator name="TagAddress">{equipment.TagAddressing[StructOffset]} + 0</calculator>
    ...
    </output>

    These can then be used in fields for an element:

    <field name="addr">MW_{MyCalc}_2</field>

    See Example 4.

Example 1 - Type with Calculator based on STRING

<?xml version="1.0" encoding="utf-8"?>

<template desc="">

<param name="type">

<string name="name">TypeWithCalc</string>

<string name="ref">TypeWithCalc</string>

<string name="blank"></string>

<string name="wildcard"></string>

<string name="parameter-definitions">param_list.param1=;Addr.BaseAddr=</string>

</param>

<input name="equipment" file="equip.dbf" desc="Equipment Database">

<field name="PARAM" />

<field name="TAGPREFIX" />

<field name="IODEVICE" />

<field name="CLUSTER" />

<field name="NAME" />

<field name="AREA" />

<field name="LOCATION" />

<field name="COMMENT" />

<field name="CUSTOM1" />

<field name="CUSTOM2" />

<field name="CUSTOM3" />

<field name="CUSTOM4" />

<field name="CUSTOM5" />

<field name="CUSTOM6" />

<field name="CUSTOM7" />

<field name="CUSTOM8" />

<field name="PAGE" />

<field name="HELP" />

<field name="DEFSTATE" />

<field name="SCHEDULED" />

<field name="COMPOSITE" />

<field name="TYPE" />

<array name="param_list">{ToProperty('{param}','=',';')}</array>

<array name="Addr">{ToProperty('{equipment.param_list[Addr]}',':',',')}</array>

<string name="MyAddrString">250</string>

<calculator name="myaddrcalc">{MyAddrString}+5</calculator>

</input>

<output name="Element" file="variable.dbf" filter="'{equipment.type}={type.name}'">

<field name="NAME" key="true">{equipment.TAGPREFIX}_Tag1</field>

<field name="TYPE">INT</field>

<field name="UNIT">{equipment.IODEVICE}</field>

<field name="ADDR">{myaddrcalc}</field>

<field name="ENG_ZERO">0</field>

<field name="ENG_FULL">1000</field>

<field name="CLUSTER" key="true">{equipment.CLUSTER}</field>

<field name="EQUIP">{equipment.name}</field>

<field name="ITEM">Tag1</field>

<field name="TAGGENLINK" load="true">TypeWithCalc_0006</field>

<field name="LINKED">1</field>

<field name="EDITCODE">3938511</field>

</output>

</template>

Example 2 - Type with Calculator based on Equipment Field

<?xml version="1.0" encoding="utf-8"?>

<template desc="">

<param name="type">

<string name="name">TypeWithCalc</string>

<string name="ref">TypeWithCalc</string>

<string name="blank"></string>

<string name="wildcard"></string>

<string name="parameter-definitions">param_list.param1=;Addr.BaseAddr=</string>

</param>

<input name="equipment" file="equip.dbf" desc="Equipment Database">

<field name="PARAM" />

<field name="TAGPREFIX" />

<field name="IODEVICE" />

<field name="CLUSTER" />

<field name="NAME" />

<field name="AREA" />

<field name="LOCATION" />

<field name="COMMENT" />

<field name="CUSTOM1" />

<field name="CUSTOM2" />

<field name="CUSTOM3" />

<field name="CUSTOM4" />

<field name="CUSTOM5" />

<field name="CUSTOM6" />

<field name="CUSTOM7" />

<field name="CUSTOM8" />

<field name="PAGE" />

<field name="HELP" />

<field name="DEFSTATE" />

<field name="SCHEDULED" />

<field name="COMPOSITE" />

<field name="TYPE" />

<array name="param_list">{ToProperty('{param}','=',';')}</array>

<array name="Addr">{ToProperty('{equipment.param_list[Addr]}',':',',')}</array>

<string name="MyAddrString">250</string>

<calculator name="myaddrcalc">{equipment.CUSTOM1}+5</calculator>

</input>

<output name="Element" file="variable.dbf" filter="'{equipment.type}={type.name}'">

<field name="NAME" key="true">{equipment.TAGPREFIX}_Tag1</field>

<field name="TYPE">INT</field>

<field name="UNIT">{equipment.IODEVICE}</field>

<field name="ADDR">{myaddrcalc}</field>

<field name="ENG_ZERO">0</field>

<field name="ENG_FULL">1000</field>

<field name="CLUSTER" key="true">{equipment.CLUSTER}</field>

<field name="EQUIP">{equipment.name}</field>

<field name="ITEM">Tag1</field>

<field name="TAGGENLINK" load="true">TypeWithCalc_0006</field>

<field name="LINKED">1</field>

<field name="EDITCODE">3938511</field>

</output>

</template>

Example 3 - Type with Calculator based on Ungrouped and Grouped Parameter

<?xml version="1.0" encoding="utf-8"?>

<template desc="">

<param name="type">

<string name="name">TypeWithCalc</string>

<string name="ref">TypeWithCalc</string>

<string name="blank"></string>

<string name="wildcard"></string>

<string name="parameter-definitions">param_list.param1=;Addr.BaseAddr=</string>

</param>

<input name="equipment" file="equip.dbf" desc="Equipment Database">

<field name="PARAM" />

<field name="TAGPREFIX" />

<field name="IODEVICE" />

<field name="CLUSTER" />

<field name="NAME" />

<field name="AREA" />

<field name="LOCATION" />

<field name="COMMENT" />

<field name="CUSTOM1" />

<field name="CUSTOM2" />

<field name="CUSTOM3" />

<field name="CUSTOM4" />

<field name="CUSTOM5" />

<field name="CUSTOM6" />

<field name="CUSTOM7" />

<field name="CUSTOM8" />

<field name="PAGE" />

<field name="HELP" />

<field name="DEFSTATE" />

<field name="SCHEDULED" />

<field name="COMPOSITE" />

<field name="TYPE" />

<array name="param_list">{ToProperty('{param}','=',';')}</array>

<array name="Addr">{ToProperty('{equipment.param_list[Addr]}',':',',')}</array>

<calculator name="myaddrcalc">{equipment.param_list[param1]}+5</calculator>

<calculator name="myaddrcalc2">{equipment.Addr[BaseAddr]}+10</calculator>

</input>

<output name="Element" file="variable.dbf" filter="'{equipment.type}={type.name}'">

<field name="NAME" key="true">{equipment.TAGPREFIX}_Tag1</field>

<field name="TYPE">INT</field>

<field name="UNIT">{equipment.IODEVICE}</field>

<field name="ADDR">MW{myaddrcalc}_2</field>

<field name="ENG_ZERO">0</field>

<field name="ENG_FULL">1000</field>

<field name="CLUSTER" key="true">{equipment.CLUSTER}</field>

<field name="EQUIP">{equipment.name}</field>

<field name="ITEM">Tag1</field>

<field name="TAGGENLINK" load="true">TypeWithCalc_0006</field>

<field name="LINKED">1</field>

<field name="EDITCODE">3938511</field>

</output>

</template>

Example 4 - Type with Calculator in Output Section

<?xml version="1.0" encoding="utf-8"?>

<template desc="">

<param name="type">

<string name="name">TypeWithCalculator</string>

<string name="ref">TypeWithCalculator</string>

<string name="blank"></string>

<string name="wildcard"></string>

<string name="parameter-definitions">TagAddressing.PLC.DBNumber=;TagAddressing.StructOffset=</string>

</param>

<input name="equipment" file="equip.dbf" desc="Equipment Database">

<field name="PARAM" />

<field name="TAGPREFIX" />

<field name="NAME" />

<field name="IODEVICE" />

<field name="CLUSTER" />

<field name="AREA" />

<field name="LOCATION" />

<field name="COMMENT" />

<field name="CUSTOM1" />

<field name="CUSTOM2" />

<field name="CUSTOM3" />

<field name="CUSTOM4" />

<field name="CUSTOM5" />

<field name="CUSTOM6" />

<field name="CUSTOM7" />

<field name="CUSTOM8" />

<field name="PAGE" />

<field name="HELP" />

<field name="DEFSTATE" />

<field name="SCHEDULED" />

<field name="COMPOSITE" />

<field name="TYPE" />

<array name="param_list">{ToProperty('{param}','=',';')}</array>

<array name="TagAddressing">{ToProperty('{equipment.param_list[TagAddressing]}',':',',')} </array>

</input>

<output name="Element" file="variable.dbf" filter="'{equipment.type}={type.name}'">

<calculator name="TagAddress">{equipment.TagAddressing[StructOffset]} + 0</calculator>

<field name="NAME" key="true">{equipment.tagprefix}_Enable</field>

<field name="EQUIP">{equipment.name}</field>

<field name="UNIT">{equipment.iodevice}</field>

<field name="CLUSTER" key="true">{equipment.cluster}</field>

<field name="TYPE">DIGITAL</field>

<field name="COMMENT">Machine Enable</field>

<field name="ADDR">DB{equipment.TagAddressing[PLC.DBNumber]},{TagAddress}.0</field>

<field name="ITEM">Enable</field> <field name="TAGGENLINK" load="true">12345</field>

<field name="LINKED">1</field> <field name="EDITCODE">3939343</field> </output>

</template>

See Also

Equipment XML Template

Import Equipment Using XML Templates

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