QUALITY.STALE_DATA (Attribute)

Associated Point Type

Device or Virtual

Access

Read only

Configured on the General tab of the Port Properties dialog box.

Value Type

Boolean

Expression Syntax

PointID.STALE_DATA

Description

When Enable stale data is checked in the Port Properties dialog box, the point will remain available in most circumstances that would have made it unavailable. However, this attribute will report that the point value is stale. It is the last known good value and may or may not have changed.

Note: Some devices may report some points as stale even without enabling this attribute.

Returned Values

1

The point value is stale.

 

0

The point is not known to be stale.

More information

Quality attributes.