DirectWriteByte Tag Command

1. Fernhill SCADA
2. Help
3. Drivers
4. Tag Commands
5. DirectWriteByte

Introduction

The DirectWriteByte Tag Command directly writes an array of bytes to a data source. A data source can be:

• A PLC Device.
• A remote data server.

Parameters

DataAddress : ANY_STRING

The "Address" of the data within the data source. See Data Address Format to understand how to set the "Address".

Data : ARRAY OF BYTE

One or more words to write to the PLC or Device.

Remarks

The DirectWriteByte Tag Command writes an array of bytes directly to a data source.

To use the DirectWriteByte Tag Command both of these conditions must be met:

• The user requires the DirectWrite User Right, and
• The EnableDirectWrite field on the tag must be set to True.

You can execute DirectWriteByte Tag Command from:

• From a Program Tag using a TagDirectWriteByteFB Function Block. See Example Program to learn more.
• The .NET API. For an example see Executing a Tag Command from .NET Code.
• The Java API. For an example see Executing a Tag Command from Java.

Requirements

Applies To

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

• Idec Micro PLC Tag
• Siemens S7 Ethernet PLC Tag
• Siemens S7 Serial PLC Tag

Further Information

DirectWriteBit

For information about writing a boolean value to a data source.

DirectWriteString

For information about writing a text string to a data source.

DirectWriteWord

For information about writing an array of words to a data source.

Fernhill SCADA Version 3.99 (20230929.1). Copyright © 2012-2023 Fernhill Software Ltd: All rights reserved.