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 device.
Active Channel Tag An active communication channel that connects to, or sends requests to, a device.
Passive Channel Tag A passive communication channel that receives commands from an external driver.
PLC Device Tag Represents a logical connection to a PLC, or Outstation, or Data Source
PLC Scanned Device Tag Represents a logical connection to a PLC or Device that is scanned at a regular interval.
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 Device.
Word Register Block Tag Represents an array of Words in an external PLC Device.
Data Point Tag Represents a single data point.
Analog Data Point Tag Represents a continuously variable data point.
Scaled Analog Data Point Tag Represents a continuously variable data point (with additional scaling options).
Digital Data Point Tag Represents a single bit data point./td>
Word Data Point Tag Represents an unsigned 16-bit integer data point.
Double Word Data Point Tag Represents an unsigned 32-bit integer data point.
Long Word Data Point Tag Represents an unsigned 64-bit integer data point.
String Data Point Tag Represents a variable length string data point.