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ManualsBrandsSiemens ManualsBuilding automationDesigo Building Automation System 6.2 - Technical Principles

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Data storage

Plant data

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13.5 Plant data

Plant data is process data from the operation of a customer plant, that is permanently saved from the time

of commissioning. Process data represents process variables in a building. The data is continuously

changed by the environment, automation station and, in the event of physical outputs, the operator. Most

process data is volatile. Few process data, such as adaptive control parameters and runtime totalization

counts, remains available following a restart or power failure of the automation station. Process data can

be archived as plant data.

13.6 Data transfer processes

Project data is transferred from the tools to the devices or other consumers online and offline via the

system interface. PX automation stations are configured offline and then the data is downloaded onto the

automation station. Desigo room automation stations (PXC3 and DXR2) can be engineered. DXR2

automation stations also have preloaded applications and only need to be configured.

Transfer operations

There are four transfer operations for data synchronization:

● Offline generation

● Online loading

● Online readback

● Offline import

Data transfer to PX automation stations

You can load a new program on a PX automation station while the old program is still running. The

operation of the automation station is not interrupted. Process values remain intact. If you load a firmware

on the automation station, you must restart the automation station.

Data transfer to Desigo room automation stations

If you load a new program on a Desigo room automation station, you must restart the automation station.

The operation of the automation station is interrupted. Process values do not remain intact. If you load a

firmware on the automation station, you must restart the automation station.

There are four loading units for Desigo room automation stations:

● Load program

● Load parameters (full download for DXR automation stations)

● Load configuration (settings on the automation station)

● Load firmware (programs, parameters and configuration are not lost)

Offline generation

Full code generation

Full code generation:

● Checks the overall application consistency (limits, identifiers)

● Converts the application into loadable units

● Generates the appropriate description data for configuration

You must compile the code to get the required performance. You cannot engineer a compiled program.