User Manual

Data storage
Data transfer processes
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● Copies additional blocks into the automation station
● Deletes blocks which are no longer valid
● Updates parameter settings
The delta download is faster than a full download. You do not need to interrupt the operation of the
automation station.
The delta download helps prevent unintentional parameter changes. Online changed process data and
settings parameters are protected against unintentional overwriting, provided the process data was not
changed in the tool.
Download options
You can define what happens in the automation station before and after the download. You can define if:
● Parameters are read back before the download
● The program starts and/or the I/O bus is turned on after the download
Online readback
During readback of non-volatile process values and parameter settings the data in the automation station
is aligned with the project data in the tool.
Readback comprises two steps:
1. Current parameter settings and non-volatile process values in the PX/PXC3 automation station are
read from the automation station and copied to the data storage.
2. The values are updated in the CFC data storage or PXC3 program and configuration data storage.
The following data can be read back from PX/PXC3 to the project data storage in the XWP/ABT tools:
● Setting parameters changed in the PX/PXC3 automation station
● Changed, non-volatile process values or configuration data
Advantages
Reading back data has the following advantages:
● Outdated data in XWP/ABT is overwritten by current data and thus is available again for reloading
programs in the PX/PXC3 automation station.
● During online changes of background variables (e.g., calendar), data between CFC and XWP/ABT and
the automation station is retained.
● Current setting parameters and non-volatile process values (e.g., operating hours) are saved.
● The newest configuration is saved offline and can be used for, e.g., reports.
Runtime data cannot be read back. Only offline data can be read back. Only objects (not individual
properties) can be read back. If a property is changed, the entire object (e.g., data point), that is, the last
change on the object is read back. The last change per object is always valid.
Workflows for changes
There are two workflows for changes:
Workflow 1 (ideal workflow):
1. Perform readback before the changes
2. Perform changes offline
3. Download
Workflow 2:
1. Perform changes offline
2. Perform readback
3. Compile
4. Download
Offline import
You can import configuration and description data for the plant into Desigo CC. This is the same as the
data downloaded to the automation station.