Tag Components

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Introduction

A tag component is a building block used by other tags. A tag component provides common features, for example:

These tag components are supported:

Tag ComponentDescription
Core Tag Provides common features in all tags
Alarm Tag Used by all tags that raise alarms
Channel Tag Provides a communication channel to a PLC or Device
Active Channel Tag An active communication channel that connects to or sends requests to a PLC or Device.
Passive Channel Tag A passive communication channel that receives connections or requests from an external driver
PLC Device Tag Represents a logical connection to a PLC or Device
PLC Device Tag with RTC Represents a logical connection to a PLC or Device with a real time clock. Fernhill SCADA can synchronize the real time clock of the PLC or device.
Byte Register Block Tag Represents an array of Bytes in an external PLC or Device
Word Register Block Tag Represents an array of Words in an external PLC or Device
Data Point Tag Represents a single data point in an external PLC or Device
Analog Data Point Tag Represents a continuously variable data point in an external PLC or Device
Scaled Analog Data Point Tag Represents a continuously variable data point (with additional scaling options) in an external PLC or Device
Digital Data Point Tag Represents a single bit data point in an external PLC or Device
Word Data Point Tag Represents an unsigned 16-bit integer data point in an external PLC or Device
Double Word Data Point Tag Represents an unsigned 32-bit integer data point in an external PLC or Device
String Data Point Tag Represents a variable length string data point in an external PLC or Device