ABB SPA OPC Server User Manual page 39

Overview of the engineering
The engineering work can be divided into three separate tasks:
1. creating an object tree,
2. configuring object properties, and
3. saving configuration data.
First, you need to create an object tree. This is done by adding objects to the object tree,
see Creating an object tree on page 43. The Figure 4-3 shows an example of how the
object tree may look like after the tree has been built. In the example tree you can see the
SPA OPC Server object and its child objects like lines, devices, racks, modules and
signals. Indentation is used to indicate the parent-child relationship between the objects.
Table 4-1 describes the objects shown in the example object tree (Figure 4-3).
Table 4-1: SPA OPC Server related objects
SPA OPC
Server
SPA Line
SPA Device
SPA Rack
SPA Module
1MRS755221
An object representing the SPA OPC Server
An object representing a physical communication line (=serial port).
You can define up to 8 lines per OPC server.
An object representing a physical device. You should not have more
than 30 devices/modules per line or more than 200 devices/modules
per server.
Collection of SPA Modules in one physical rack.
A SPA Device placed in a relay rack, for example, SPACOM
modules. You should not have more than 30 modules/devices per
line or more than 200 modules/devices per server.
Section 4 Engineering
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