Applying the new German standard DIN V VDE 0801 "Principles for computers in safety-related systems" was a difficult task for the manufacturers of controls. The project was intended to show that compliance with the requirements of the above standard allows for the realisation of a safety level which is comparable to that of conventional contact operating control systems. The investigations aimed to prove that homogeneous-redundant programmable controllers can generally be used to ensure the safety of press controls.
Test methods for homogeneous-redundant programmable controllers are developed. Fault-avoiding measures in accordance with DIN V VDE 0801 were applied: e.g. inspection, walk-through, white-box-test, extended functional tests and tests relating to the effect of environmental factors.
The basic investigations yielded a number of important results for the certification of computerised controls covered by the Machinery Directive and the Low Voltage Directive. Stored programme controls make proof of a high level of hardware quality, including the operating system. If such controls are used, testing can be limited to the user programme and the correct parametric system design.
mechanical engineeringType of hazard:
Elektrische Gefährdungen, Mechanische GefährdungenCatchwords:
Anlagensicherheit, Sicherheitstechnik, MaschinensicherheitDescription, key words:
presses, safety, control