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FUNCTION xpxTestAttr (instanceId , attrId : GENERIC;
VAR isSet : BOOLEAN)
status : INTEGER;
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The xpxTestAttr function returns TRUE in the isSet argument if the specified attribute attrId in the specified instance instanceId has a value, else the isSet argument is set to FALSE. An attribute is assigned a value by a put function like xpxPutAttr, xpxPutAttrs etc.
This function is equivalent to the EDMinterface function sdaiTestAttr
Arguments
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| GENERIC | instanceId | comment |
| GENERIC | attrId | |
| BOOLEAN | isSet |
Return Value
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Options
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Example
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See also
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