General

Name the point, following these rules:

Type a basic description of the point. The description will be displayed in client applications and user reports.

Specify a relevant expression or a tag name. For details, see Configure Trigger Input and Output points.

Use this attribute only with trigger input and output points.

Provide a full path to the controller and the tag from which the data is coming. If you replace the controller with a different one that measures the same process value, it is usually best to continue using the same point. Edit the point as required so that it will collect the new data.

Use the following format of the path:

When a source tag receives events from the controller, the tag that you set in this attribute reads (or writes back) events from the controller.

Type the trigger tag name. If you type a tag name, the source tag referenced must not be high-speed or have a scan rate of faster than 1 second. Otherwise, the module will generate an error and you will not be able to save the point.

Use this attribute only with the Trigger Input or Output tags.

Set the data type of the point values. When you change the point type, the archive subsystem closes the current archive record and starts a new one with the new type information in the header. For points collected automatically, use the point type that most closely matches the point type in the source system.

Choose from the following:

Select the type of digital set for the point.

Choose from the following:

Use the System Management Tools of FactoryTalk Historian SE to create additional digital sets. For more information, refer to the

PI Data Archive 2015 R2 Introduction to System Management Guide.pdf

.

This attribute only appears if the point is of type

digital

.

Determine the scan type for the point.

Choose from the following:

Note:

For details, see Configure scan types.

Identify active tags. The active tags are updated. If you want a point to be the active point, set this attribute to

On

and the point source to

FHTME

.

Type a reasonable value for a point.

For a numeric tag, it must be greater than or equal to the value of the

Zero

attribute, and lower than or equal to the sum of the

Zero

and

Span

attribute values.

The typical value range is between 0 and 100.

The typical value range for the points of type

Digital

is between 0 and 1.

Identify the interface to which the point belongs.

When you configure an interface, you specify a point source for the interface. All the points that belong to the interface must use that point source code as the value for the

Point Source

attribute.

The default point source is

FTME

. Other options include:

Set the period of time in seconds, which tells FactoryTalk Historian ME how often to collect the data.

For the Trigger Input and Output scan types, it is recommended that the scan rate be defined as two seconds or longer.

For details, see Use scan classes.

Set the difference between the top and the bottom of the range.

This attribute is required for all numeric data type points.

For

Float16

point types, the

Span

value is used with the

Zero

value for scaling values in the archive. The

Span

property must be a positive value. If the value for a

Float16

point type is greater than the top of the range, it is recorded in the archive as

Over Range

.

For other point types, the

Zero

and

Span

values do not affect the values recorded in the archive. The

Span

property is also used when defining a FactoryTalk Historian ProcessBook trend with a vertical scale of the database. This attribute is not used for non-numeric points.

Type the lowest value possible.

This attribute is required for all numeric data type points. It does not have to be the same as the instrument zero, but that is usually a logical choice.

The zero value range is between 0 and 100.