Paradigm shift in PLC programming

In the programming of PLCSystems
(Programmable Logic Controller) in building
automation there are no vital changes over the past few years. Most user of PLCSystems
in building
automation do the programming in fbd (functional block diagram). The users normally start their
projects with the programming of the PLCSoftware.
After that the HMI (Human Machine Interface)
or the SCADASystem
(Supervisory Control And Data Acquisition) are added as subsequent Tasks.
This paper present a new approach to a project, the approach is changed from a bottom up into a top
down one. The starting point of a project is the plant diagram. The programming is done in the plant
diagram. Template objects (e.g. for pumps) created with the object orientated paradigm are used to
accomplish this task. The created PLCSoftware
runs in a virtual machine on the PLCSystem
and
thus will be reusable on PLCSystems
of different manufacturers.

Citation:
Gasser, T., Palmer-Brown, D., Xiao, D. (2009) ‘Paradigm shift in PLC programming’ Proceedings of Advances in Computing and Technology, (AC&T) The School of Computing and Technology 4th Annual Conference, University of East London, pp.43-50.