Module for control of safety critical cycles in the control of machines and plant has redundant hardware

摘要

The control of safety critical processes of machines has a module (1) with a fault tolerant or two channel structure in which there are redundant hardware stages (3,4) that contain diverse software. Failures or faults are identified and actions initiated for prevention of erroneous machine operations. This uses a control program in memory (11) loaded over an interface (6).