Specifications

8 – Configuring Points
122 R400
If the PlantScape Distributed Server Architecture option is installed, the point ID
of any point that will be accessed from another server must be unique across all
servers.
Description
Use the Description to provide more detailed identifying information about the
point; for example, “Number 3 blast furnace”. This description is often displayed
in conjunction with the point ID on a Station display to help identify the
equipment or the types of values that this point is to monitor or control.
Area Code
The Area Code indicates that this point is assigned to a specific area at your site.
Areas are used to enhance the security of your system. In a distributed server
architecture, any point that can be accessed by more than one server must be
assigned to an area.
For more information about areas and how they are used in PlantScape, see
“Using Areas to Control Access to the System” on page 222 and “Configuring
Distributed Server Architecture” on page 335.
Scanned Point Parameters
The main point parameters are process variable (PV), output (OP), set point (SP)
and mode (MD). See Table 8.1, “Summary of Point Parameter Types,” on
page 134 for a list of all parameters and the point types that can use them.
PlantScape can store and manage multiple values in the one point. You can
therefore use a single point to monitor and control a complete control loop. In
many cases, however, the only parameters of a point that need to be configured
are:
• The PV which shows the current value of a given location within a
controller
• An OP used to reset or control a value
The names of the parameters reflect their most common usage. They can,
however, be used to hold any controller values.
plscpcg.book Page 122 Monday, May 28, 2001 10:11 AM