Class TPLCBlockElement

Unit

PLCBlockElement

Declaration

type TPLCBlockElement = class(TPLCNumberMappable, ITagInterface, ITagNumeric)

Description

:

Class of Block element tag. Used to get a single value from a set of values (block).

See also

TPLCBlock

Hierarchy

• TComponent
• TTag
• TPLCTag
• TPLCNumber
• TPLCNumberMappable
• TPLCBlockElement

Overview

Fields

PIndex:Cardinal;

Methods

	procedure SetBlock(blk:TPLCBlock);
	procedure SetIndex(i:Cardinal); virtual;
	function GetVariantValue:Variant;
	procedure SetVariantValue(V:Variant);
	function IsValidValue(aValue:Variant):Boolean;
	function GetValueTimestamp:TDatetime;
	procedure WriteFaultCallback(Sender:TObject); virtual;
	procedure TagChangeCallback(Sender:TObject); virtual;
	procedure RemoveTagCallBack(Sender:TObject); virtual;
	function GetValueRaw:Double; override;
	procedure SetValueRaw(aValue:Double); override;
	procedure ScanRead; override;
	procedure ScanWrite(Values:TArrayOfDouble; Count, Offset:Cardinal); override;
	procedure Read; override;
	procedure Write(Values:TArrayOfDouble; Count, Offset:Cardinal); override;

Properties

	property PLCBlock: TPLCBlock read PBlock write SetBlock;
	property Index: Cardinal read PIndex write SetIndex;
	property EnableMaxValue;
	property EnableMinValue;
	property MaxValue;
	property MinValue;

Description

Fields

	PIndex:Cardinal;

Methods

	procedure SetBlock(blk:TPLCBlock);

	procedure SetIndex(i:Cardinal); virtual;

	function GetVariantValue:Variant;

	procedure SetVariantValue(V:Variant);

	function IsValidValue(aValue:Variant):Boolean;

	function GetValueTimestamp:TDatetime;

	procedure WriteFaultCallback(Sender:TObject); virtual;

	procedure TagChangeCallback(Sender:TObject); virtual;

	procedure RemoveTagCallBack(Sender:TObject); virtual;

	function GetValueRaw:Double; override;
: See also TPLCNumber.GetValueRaw

	procedure SetValueRaw(aValue:Double); override;
: See also TPLCNumber.SetValueRaw

	procedure ScanRead; override;
: See also TPLCTag.ScanRead

	procedure ScanWrite(Values:TArrayOfDouble; Count, Offset:Cardinal); override;
: See also TPLCTag.ScanWrite

	procedure Read; override;
: See also TPLCTag.Read

	procedure Write(Values:TArrayOfDouble; Count, Offset:Cardinal); override;
: See also TPLCTag.Write

Properties

	property PLCBlock: TPLCBlock read PBlock write SetBlock;
: Communication Block of the element.

	property Index: Cardinal read PIndex write SetIndex;
: Index of tag element on the Tag Block.

	property EnableMaxValue;
: See also TPLCNumber.EnableMaxValue

	property EnableMinValue;
: See also TPLCNumber.EnableMinValue

	property MaxValue;
: See also TPLCNumber.MaxValue

	property MinValue;
: See also TPLCNumber.MinValue

Author

• Fabio Luis Girardi <[email protected]>

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