H. Gall et G. Rabe, INTERNATIONAL AND EUROPEAN STANDARIZATION FOR PLCS IN SAFETY-CRITICALSYSTEMS - QUALIFICATION, TYPE TESTING, CERTIFICATION AND LICENSING, ISA transactions, 34(3), 1995, pp. 273-281
Over the last years design principles and quality requirements for pro
grammable systems with safety related functions for protection of huma
n life and plant equipment for various fields of application were work
ed out in national and international regulations, guidelines and opera
ting instructions. The paper presents an overview of the achieved stat
us and the future trends. Additionally the type approval, certificatio
n and licensing (application dependent) will be included.