WriteValueQuality Tag Command

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5. WriteValueQuality

Introduction

The WriteValueQuality Tag Command writes a new value and quality to a tag.

Parameters

Value : ANY_ELEMENTARY

The new value of the tag.

Quality : INT

The new quality of the tag.

Remarks

The WriteValueQuality Tag Command writes a new value and quality to a tag.

The Value parameter is ANY_ELEMENTARY. ANY_ELEMENTARY is a generic data type, which allows any simple value. For more information on ANY_ELEMENTARY and other generic data types see Generic Data Types.

The WriteValueQuality Tag Command will attempt to convert the Value parameter to a type compatible with the host tag. To avoid errors you should ensure the Value parameter is compatible with the host tag. The type expected by the driver for a given tag type is shown in this table:

Icon	Tag Type	Expected Value Type
	Analog	LREAL
	Digital	BOOL
	Word	UINT
	Double Word	UDINT
	Long Word	ULINT
	String	WSTRING

You can execute WriteValueQuality Tag Command from:

• From an Operator Action using a TagWriteValueQuality Function.
• From a Program Tag using a TagWriteValueQualityFB Function Block.
• The Standard Tag Menu when used with one of the tags listed in the Applies To list.
• The Java API. For an example see Executing a Tag Command from Java.

To use the WriteValueQuality Tag Command, the user requires the Write User Right.

Requirements

Applies To

The WriteValueQuality Tag Command can be used with these tag types:

• Internal Analog Data Point Tag
• Internal Digital Data Point Tag
• Internal Word Data Point Tag
• Internal Double Word Data Point Tag
• Internal Long Word Data Point Tag
• Internal String Data Point Tag

See Also

WriteValue

Fernhill SCADA Version 4.1 (20231126.1). Copyright © 2012-2023 Fernhill Software Ltd: All rights reserved.