Manage tags with the Tagname dictionary

Field Name

Description

Main

Displays the main fields name, group, data type, and so on.

Details

Displays displays all the other fields like initial value, eng units, min max values and so on apart from the main fields.

Alarms

Displays alarm related fields like ack model, limit alarms(LoLo, Lo, Hi, HiHi), deviation alarms (Minor, Major), and ROC apart from the main fields.

Details & Alarms

Displays alarm related and all the other fields available.

Members

This field gets enabled when you select the Type as Supertag. It displays the members of supertag under member list. This fields Member list, Data Access, Memory, and I/O fields.

New

Select to create a new tag, (https://docs.aveva.com/bundle/intouch-hmi/page/316345.html)

Restore

Restores the values that was saved last

Delete

Deletes the tag that are not in use. Else, this option will be disabled.

Save

Saves the tag configuration

<<

switches to the previous tag

>>

switches to the next tag

Select

Opens the Select tag window, where you can select the existing tags.

Cancel

Closes the Tagname dictionary without saving the changes.

Close

Closes the Tagname dictionary after saving the changes.

Tagname

Name of the tag

Type

Displays supported InTouch tag types. Each type of InTouch tag has unique data properties. The fields will be displayed based on the type you have selected.

Local Tag

Allows the user to create per-session memory tags for use in the Web Client. Memory tags define internal system constants and variables within InTouch applications.

Group

By default, all tags belong to the $System alarm group. You can modify alarm groups using option.

Read only

This field enables when the Type is selected I/O. If this field is selected at runtime you cannot write to the I/O source.

Read write

This field enables when the Type is selected I/O. If this field is selected at runtime you can write to the I/O source.

Comment

Optional comment.

Log Data

Logs the data for that particular tag to the log file or Historian.

Log Events

Logs events for that tag to the log file. You can set value logging options. When you select this option the Priority field is displayed.

Retentive Value

When this field is selected, the initial value of the tag is assigned its last active value from runtime when the application starts again.

Retentive Parameters

When this field is selected the minimum value, max value, log deadband etc. . of the tag is assigned its last active value from runtime when the application starts again.

Initial Value

Discrete, integer, real, and message tags are assigned an initial value when the InTouch application starts in WindowViewer. In the case of a discrete tag, the initial value is one of the possible binary states. For integer and real tags, the initial value is the number associated with the tag when the application starts.

Deadband

A deadband is a sensitivity setting for tag values. It is usually associated with I/O tags whose values change constantly. A deadband filters out small momentary changes in a tag value to reduce the amount of InTouch data processing.

Min EU

Sets the lower boundaries of the range of possible numerical values assigned to a tag. (The minimum value in engineering units assigned to the tag.)

Max EU

Sets the upper boundaries of the range of possible numerical values assigned to a tag. (The maximum value in engineering units assigned to the tag.)

Min Raw

The low clamp setting of a raw value received from an I/O Server.

Max Raw

The high clamp setting of a raw value received from an I/O Server.

Eng Units

Assigns an engineering units label that describes the unit of measure for the tag’s value. For example, you can assign PSI as the Eng Units property for an integer tag associated with pump pressure.

Log Deadband

The log deadband sets a threshold that must be exceeded before the tag’s value is written to the log file.

Conversion

Linear

Square Root

The type of conversion to scale raw values when calculating engineering units.

Access Name

An Access Name defines a communication link with another I/O data source. Each Access Name specifies an I/O address consisting of a node name, an application name, and a topic.

Item

Userdefined tag name can be configured as the item. Item Name supports a maximum of 254 characters.

Use Tagname as Item Name

Allows you to use the tag name as the item. Item Name supports a maximum of 254 characters.

ACK Model

Monitors the acknowledgment model associated with a tag as follows:

0 = condition (default)

1 = event oriented

2 = expanded summary

Condition

Acknowledgment counts against all transitions into the alarmed state or a sub-state up to the time of the acknowledgement. This is the default acknowledgement model.

Event Oriented

acknowledgment will only be for a particular transition to the alarmed state or a sub-state; an acknowledgment is accepted only if it refers to the most recent transaction.

Expand Summary

Acknowledgment will only be for a particular transition, whether to an alarmed state, to a sub-state, or a return to normal. Each transition from the normal state marks the beginning of a new "return to normal" (RTN) group. All transitions in an RTN group must be acknowledged individually before the overall RTN group is considered acknowledged.

Alarm Comment

Optional Alarm Comment to describe about the Alarm

Alarm Value

The limit values for the alarm types.For example, in the case of LoLo and Low alarms, an alarm condition exists whenever the value of the tag is less than the Alarm Value. In the case of High and HiHi alarms, an alarm occurs whenever the value of the tag exceeds the Alarm Value. You can use real numbers for the limits.

LoLo

Alarm Type

Low

Alarm Type

Priority

Sets the alarm priority. Type a number between 1 and 999.

Alarm inhibitor

Can optionally assign to each alarm state an inhibitor tag that prevents the alarm from transitioning into an active state.

High

Alarm Type

HiHi

Alarm Type

Value Deadband

The value deadband property sets a threshold that must be exceeded before WindowViewer refreshes the tag’s value in run-time memory

Minor Deviation

This values indicates a minor deviation alarm limit configured for an integer or real tag.

Major Deviation

This values indicates a major deviation alarm limit configured for an integer or real tag.

Target

The current tag value is compared to a target value, and then the absolute value of the difference is compared to one or more limits.

Deviation Deadband %

The percentage that the analog tag can deviate from the target value to trigger a minor or major deviation alarm condition.

Rate of Change

A rate of change alarm detects when the absolute value of an alarm exceeds a specified limit over a measured interval. A tag is tested for a rate-of-change alarm whenever its value changes. The change rate is calculated using the previous tag value, the time of the previous change, the current tag value, and the current time. The calculated rate of change over time is compared to a rate-of-change percentage limit specified for a tag. If the calculated rate-of-change is greater than the percentage limit, an alarm condition is set for the tag.

%per

Sec

Min

Hr

The maximum allowable percentage change limit.

Sec, Min, or Hr aare the time interval unit

Priority

Sets the alarm priority. Type a number between 1 and 999.