Class TTagBit

Unit

TagBit

Declaration

type TTagBit = class(TPLCNumber, ITagInterface, ITagNumeric)

Description

Tag that represents a set of bits of another tag.

:

For example, if the linked tag has the value 5 (00000101 bin). With StartBit=1 and Endbit=2, the value of the tag bit will be 2 (10 bin). With StartBit=0 and EndBit=2, the value of the tag bit will be 5 (101 bin). With StartBit=0 and EndBit=1, the value of the tag bit will be 1 (01 bin). With StartBit=0 and EndBit=0, the value of the tag bit will be 1 (1 bin).

StartBit is the less significant bit of the tag and EndBit represents the most significant bit. Therefore Endbit must be greater or equal than StartBit.

Hierarchy

• TComponent
• TTag
• TPLCTag
• TPLCNumber
• TTagBit

Overview

Methods

	procedure SetValueRaw(bitValue:Double); override;
	function GetValueRaw:Double; override;

Properties

	property PLCTag: TPLCNumber read PNumber write SetNumber;
	property UseRawValue: boolean read PUseRaw write SetUseRaw;
	property StartBit: TBitRange read PStartBit write SetStartBit;
	property EndBit: TBitRange read PEndBit write SetEndBit;
	property EnableMaxValue;
	property EnableMinValue;
	property MaxValue;
	property MinValue;

Description

Methods

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

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

Properties

	property PLCTag: TPLCNumber read PNumber write SetNumber;
: Tag where the bits will be mapped.

	property UseRawValue: boolean read PUseRaw write SetUseRaw;
: If True, the bits will be mapped from the raw value (ValueRaw property of the tag).

	property StartBit: TBitRange read PStartBit write SetStartBit;
: First bit of the tag word to be mapped. Starts from 0 (ZERO).

	property EndBit: TBitRange read PEndBit write SetEndBit;
: Last bit of the tag word to be mapped. The Maximum value accept is 31.

	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]>