|
 Accessible any time
Quick access
Written to point
database
Available in point list
Definition can be
modified
|
Uses memory in point
database
Project uses more
memory
Configuration updates can
be lengthy on larger systems
|
None—all functions supported
|
|
Created on demand when
needed
No memory usage until point
is created
Project uses less disk
space
Point database is
reduced
|
Not available in point
lists
Slowest access
Device points only
Does not reside in point
database
Definition cannot be
modified
Exclusive to classes
Trigger settings and Alarm
options are not available
Note:
Are not recommended for points that are accessed often.
|
Trend buffering
Alarming
Attribute set
Analog deadband
Cannot be used within
another point's configuration, e.g. Safety point, Trigger,
Availability Trigger point, etc.
Cannot be used in a
calculation point equation
Cannot use another point
within its configuration, e.g. Safety point, Trigger, Availability
Trigger point, etc.
Cannot be marked as an
enterprise point.
|
|
Loaded when needed
No memory usage until point
is loaded
Written to point
database
Available in point list
Definition can be
modified
|
Slower access
Configuration updates can
be lengthy on larger systems
Trigger settings and Alarm
options are not available
|
Trend buffering
Alarming
Cannot be used within
another point's configuration, e.g. Safety point, Trigger,
Availability Trigger point, etc.
Cannot be used in a
calculation point equation
|
