Product specifications

SPlus Operations P13 Connectivity Guide PROCONTROL P13 OPC SERVER
2VAA001153C 43
Examples:
Figure 3-27: Examples for PServer naming conventions for OPC items
The naming convention for OPC items associated with PVs is of course derived from the naming conventions for PVs
(see 3.4.2.2 Naming Conventions for Process Variables).
For properties supported by a certain PV type see Chapter 3.7 PV Definitions.
3.4.2 Data Access for Process Image
3.4.2.1 Data model
                   
objects and there relations.
The PServer can provide two views on the data of a Procontrol system. The Process Image view represents the
process controlled by Procontrol as a collection of process variables. A Process Variable (PV) is a named object
representing a Process Signal or a Control Object. A Process Signal is a process variable representing an analog (AI,
AO) or binary (DI, DO) value. A Control Object is a process variable representing a control function with associated
commands and feedback signals.
The object classification for the process image view is shown in the following picture:
Figure 3-28: Classification of Process Variables
For further description of the individual control object types see the corresponding Procontrol documentation on
multifunction.
#_2.1E.3F
Object #_: Control System
Part 2.1E.3F
(Bus,Station, Device)
Control System Item :
12MAW10AA001_XC50.RLOW
Loop
Signal

PV Property Item :
AI
DI
AO
DO
VW2(X)
VW3(X)
VW4(X)
ASI(X)
ASP(X)
HST(X)
SWV(X)
ASE(X)
ASM(X)
ASS(X)
GSA(X)
Bus
Line
CONDX
STEP
X
Station
Process
Variable
Process
Signals
System
Object
Binary
Control
Selector
Control
Analog
Control
Condition
Definition
Control
Object