NOPSA Alerts On Safety Control Systems Safety

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Jan 192011
 

Will the PLC do what's expected or what it's told?

Australia’s National Offshore Petroleum Safety Authority has issued a warning regarding the potential for malware or inadequate design of safety-related control functions to cause death or injury when they do not perform in the intended manner. While the alert is aimed at the offshore industry it applies equally to the maritime industry where there has been a number of accidents involving programmable logic controllers.
What happened?
NOPSA has encountered a number of instances, in a diverse range of applications, where Operators have introduced equipment or systems that have potential weaknesses in the design of their safety-related control systems.
In some cases, Operators have been unaware of the significance of control systems as control measures against Major Accident Events and Dangerous Occurrences, and have consequently not used appropriate safety management techniques in their design and operation. Continue reading »

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