Tag Command Functions

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Introduction

Tag command functions allow an Operator Action (written as IEC 61131-3 Structured Text) to send commands to tags. For example:

Tag Command Functions

You can use these IEC 61131-3 functions in operator action scripts to send commands to tags:

FunctionReturnsDescription
TagAcknowledgeAlarms Acknowledges the alarms associated with a tag. Uses the AcknowledgeAlarms Tag Command.
TagAlarmPropertyOverride Overrides a property of an alarm tag. Uses the AlarmPropertyOverride Tag Command.
TagAlarmPropertyRestore Restores the property of an alarm tag back to its configured value. Uses the AlarmPropertyRestore Tag Command.
TagDirectWriteBit Writes a bit value to an address in a data source. Uses the DirectWriteBit Tag Command.
TagDirectWriteByte Writes an array of bytes to an address in a data source. Uses the DirectWriteByte Tag Command.
TagDirectWriteString Writes a string value to an address in a data source. Uses the DirectWriteString Tag Command.
TagDirectWriteWord Writes an array of words to an address in a data source. Uses the DirectWriteWord Tag Command.
TagDisableAlarms Disables the alarms associated with a tag. Uses the DisableAlarms Tag Command.
TagEnableAlarms Enables the alarms associated with a tag. Uses the EnableAlarms Tag Command.
TagForceValue Forces the value of a tag to a fixed constant value. Uses the ForceValue Tag Command.
TagSendMessageTo Sends a message to a user. Uses the SendMessageTo Tag Command.
TagWriteValue Writes a new value to a tag. Uses the WriteValue Tag Command.
TagWriteValueQuality Writes a new value and quality to a tag. Uses the WriteValueQuality Tag Command.
TagRefresh Requests and immediate refresh of data associated with a tag. Uses the Refresh Tag Command.
TagResetStatistics Resets the statistics counters of a tag. Uses the ResetStatistics Tag Command.
TagRemoveForce Removes any forcing applied to a tag. Uses the RemoveForce Tag Command.
TagRun Requests and immediate run of a text report, calculation or program. Uses the Run Tag Command.

These functions can be called using a Structured Text Function Call.

Further Information

Operator Actions

To learn about where you can configure operator actions.

Driver Tag Commands

For more information about tag commands.

Glossary

For the meaning of terms used in Fernhill SCADA.