Tag Commands

Help Contents

Introduction

A Tag Command is an action, or a command, on a tag.

These tag commands are supported:

Tag Command Description
AcknowledgeAlarms Acknowledges all alarms associated with a database tag
DirectWriteBit Directly writes a single bit to a data source
DirectWriteByte Directly writes one or more BYTEs to a data source
DirectWriteString Directly writes a string to a data source
DirectWriteWord Directly writes one or more WORDs to a data source
DisableAlarms Disables all alarms associated with a database tag
EnableAlarms Enables all alarms associated with a database tag
ForceValue Applies a force to a Data Point Tag temporarily masking the real value
PollDataClass Requests a poll of a class of data from a remote device.
Refresh Asks a tag to immediately read its value(s) from the data source
RemoveForce Removes a force from a Data Point Tag restoring the actual value
ResetStatistics Resets the statistics counters of a Channel Tag
Run Requests the execution of a calculation or a program
SendMessageTo Sends a message to a user
SetClock Attempts to synchronize the real time clock of a PLC
Write Asks a tag to write predefined values to a data target
WriteValue Writes a new value to a database tag
WriteValueQuality Writes a new value and quality to a database tag

User Rights

Tag commands are protected by User Rights. To execute a tag command, the user must be granted the corresponding user right. For example: to execute a control request on a PLC, the user must have the Write user right for the corresponding tag.