Specifications

Main Properties
PlantScape Server and Client Configuration Guide 123
Status Point Parameters
A status point can access three types of field values:
• Process Variable (PV)
• Output (OP)
• Mode (MD)
Figure 8.1, “Status Point Representing a Pump” on page 123 shows the
relationship between a field value and a status point.
Status Point Process Variable (PV)
For every point in your system that is to be used in monitoring a process or
value, you need to define the “input” (for example, the reading from a field
device) so that the server knows what kind of information it has to read from the
controller that is regulating that process or value.
This input is known in PlantScape as the “process variable” (or PV) of a point,
because it represents values that are a function of the process itself (or the
controller or both). Process variables cannot be changed by an operator.
Figure 8.1 Status Point Representing a Pump
PV
OP
MD
Digital Input
Digital Output
Server (Station Display) Controller Plant Equipment
DEVCTL
MD
OP
Pump
plscpcg.book Page 123 Monday, May 28, 2001 10:11 AM