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KNX BASIC COURSE

reconstruction via a supplementary ETS function (currently not yet available in ETS4)
requires this product data to restore the project.

13.5 Central database memory and master database

Check in

Check out

Local copy Local copy Local copy

Figure 63: Example of central database management

The central data server mentioned above is also essential for workgroups. All project
databases can thus be managed comfortably and edited by all employees and copied
back again. This process is called “checking out” and the opposite is “checking in”. If a
database is only located on the central server, it is called “checked in”. If a project
engineer retrieves the database for editing, it is “checked out”. The checked out database
can only be edited by one person; however at that moment a copy is kept on the central
server in the form of a backup. This can be restored if the local copy gets lost.

However it is no longer possible to match a restored backup database with the checked
out original!

14 Complete project documentation

Which documentation should be drawn up by the contractor? When can documentation be
considered complete? What is the customer entitled to? And when?
These questions are regularly asked by many training participants. However, also in this
case there is no standard answer. You can however at least refer to the relevant
regulations and ordinances, which define an approximate scope of the documentation to
be provided. In the end, it is always the duty of the parties under contract to define at the
initial planning and design stage and before the placing of the order, what constitutes a
completely delivered “work”.

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