User Manual

System overview
Views
3
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without changing the technical structure. The UD can be used in the management platform in addition to
the TD. The detailed view in the PXM20 operator units shows the UD as information.
User Designation for Desigo room automation
You can define the user view for Desigo room automation as follows:
● Define a structure for the user view
● Copy Desigo room automation objects into the user view
● Define UDs that can be used as object names
System view
The system view shows the standard system hierarchy (BACnet view):
● Network, topology
● Device and third-party device view
● Flat representation (no hierarchy) of all BACnet objects in one device
The system view provides access to all BACnet devices (including third-party BACnet devices) and all
BACnet objects. A third-party client displays this view of a PX device.
The system view is used in the PXM20 only for third-party devices.
Program view
The engineering and program view corresponds to the XWP/ABT view. The structure is matched to the
automation station. Within an automation station, the view is program oriented: nested CFC charts
(compounds) and function block instances.
Views and users
The views reflect the differing needs of their users.
Per User Technical view User view System view Program view
1 Operator (without technical
training)
Main view Main view No access No access
2 Operator (with technical
training)
Main view Main view Occasionally No access
3 Engineer (Desigo CC), User
(PXM...)
Main view Main view Occasionally No access
4 Service engineer, Siemens
service engineer
Main view Rarely Rarely Main view
Flexible object name / device ID engineering
You can flexibly generate the object name during engineering in XWP. This is called the Free Designation
(FD). However, the FD has no inherent hierarchical structure, which makes it tedious to engineer and
lowers its helpfulness to orientate in larger buildings. It should thus be considered as a naming type for
very special purposes only.
Flexible object name engineering causes a greater engineering effort and must thus be requested
specifically by the customer.
Each BACnet object has an object name for identification on the BACnet network. This object name must
be unique within the automation station. The Technical Designation (TD) is used as default for the object
names. The TD is a technical identifier and is used to identify the plant and associated elements in the
technical view.
You can select how the object name is created for each standard BACnet object. This especially applies to
BACnet multivendor projects, where a special object name structure is required.