Automation & Control
A further key factor is the sensible deployment of the energy available during production. Here, too, certain auxiliary processes can take a break during production. PROFIenergy thus has the task of managing and making most efficient use of the energy available. Partial load operation must be possible.
Selective measures are already taken today, in order to shut down plant sections during breaks. These are, however, very application-specific. Frequently the actual control task and the energy management are amalgamated. This all makes the program generation, but especially the maintenance of such software, very difficult. In addition, external hardware is necessary for the
execution of the actual switching process and this hardware must be configured, installed and maintained. The cost of doing this often outweighs the actual savings,
so many users do not take such measures PROFIenergy also offers an economical solution here. This is a matter of a pure data interface, as the switching functions are already integrated in the devices. In addition, there is a clear separation between the
program sections for the energy management and the control logic. Both parts are clearly separated from one another and can be tested and put into service independently of one another.
Structured programming In the long term, the care and maintenance of the user program is significantly simpler due to structured programming. This enables users in turn to integrate PROFIenergy easily into their own (factory) standards and program libraries. ■
Mark Freeman is Product Manager, Siemens Industry Automation & Drive Technologies, Manchester, UK.
http://www.industry.siemens.co.uk/home/uk/en/IADT/Pages/ Default.aspx
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