AS and OS expansions
7.2 Program changes
Compendium Part D - Operation and Maintenance (V9.0)
Operating Manual, 02/2018, A5E43228948-AA
83
The first task is to check the logs for the chart folder in the plant, for example, by calling the
menu command "Options > Logs" in the CFC editor. Save all the available logs separately as
text files to be able to compare them later.
Select the menu command "CPU > Compare…" in the CFC editor to check the project status
before each download procedure.
PCS 7 provides the following three time stamps:
As can be seen in the screenshot, the online program that you have downloaded to the CPU
is only identical to the offline program, in other words, the chart folder and the compiled
blocks in the block folder, if the last two time stamps match exactly and are more recent than
the "Last download-relevant change" time stamp.
In all other cases, care needs to be given to the running process:
● If the last download-relevant change is more recent than the last compilation, changes
made in the project have not been compiled.
● If the last compilation is more recent than the compilation of the loaded program, the
compiled changes in the project have not been download to the CPU.
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