When opened from the Domain Explorer this dialog enables you to add a new tag to the current domain.
When opened from the Reference Explorer this dialog enables you to add a new typical tag class (denoted by "Typical").
Tag class
Enables you to select a tag class that you require. Tag numbers are classified according to the following tag classes:
You cannot create a typical tag belonging to the Test equipment and Functional Requirement
classes.
|
Tag Class |
Description |
|---|---|
|
Conventional |
An instrument that relies mostly on basic analog and discrete signals and does not belong to the fieldbus, telecom, electrical, or typical classes. |
|
Electrical |
An instrument that is associated with electrical signals. |
|
Foundation Fieldbus |
An instrument that is associated with a Foundation Fieldbus segment. This is an all-digital, serial, two-way communications system that serves as the base-level network in a plant or factory automation environment. |
|
Foundation/PA virtual tag |
A virtual digital tag for Foundation/Profibus PA instruments. This tag represents the control signal that is associated with the control function |
|
Functional Requirement |
A general tag class that is be associated with a loop at the early FEED design stage to capture process data information |
|
HART |
A Highway Addressable Remote Transducer (HART) instrument. An instrument based on technology that extends the 4-20 mA standard analog transmission with a superimposed digital signal that contains process and instrument data. |
|
HART Virtual Tag |
A virtual digital tag for HART instruments. |
|
Profibus-DP |
An instrument associated with a Profibus DP (Decentralized Peripherals) segment. This instrument is used to operate sensors and actuators via a centralized controller in production automation applications. |
|
Profibus-PA |
An instrument associated with a Profibus PA (Process Automation) segment. This instrument is used to monitor measuring equipment via a process control system in process automation applications. |
|
Soft Tag |
The control functions or internal calculations used to monitor or control a process or a signal as part of the control strategy. |
|
Telecom |
A telecom instrument. |
|
Test Equipment |
An instrument used to calibrate other instruments or equipment. Can be assigned to more than one instrument. |
Tag number
Enables you to type the name of a new tag number. Use the Tab key or the left and right arrow keys to move the cursor to the next place. You can make your corrections or changes by overwriting the existing values. Alternatively, you can select the characters with the mouse pointer and then type the new content.
The data field displays the tag number name template which is based on the tag naming convention defined by the Domain Administrator for the current unit. Each segment may consist of any combination of letters, digits, spaces, and characters. You can customize the tag number name template to set a default, but only the Domain Administrator can change the naming conventions.
For typical tags, the naming convention is hard coded for an instrument and loop
and cannot be changed.
Example (for tag naming convention): 101–FE 2225/E
|
Segment |
Description |
|---|---|
|
101 |
Unit number. A prefix derived from the tag naming convention defined by the Domain Administrator. |
|
FE |
Instrument type. |
|
2225 |
A tag number |
|
E |
A suffix |
Example (for typical tag naming convention): AV -1 /A
|
Segment |
Description |
|---|---|
|
AV |
Instrument type |
|
1 |
Tag number |
|
A |
Tag suffix |