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Posts Tagged ‘Sergio Diaz’

Security for Safety System Logic Solvers-Physical Key Switches and Software Locks

Posted in Safety on Friday, August 30th, 2019. No comments yet
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Author: Sergio Diaz As a product marketing manager for DeltaV safety instrumented systems (SIS), I have been asked a few times why the key switch on the CHARMs Smart Logic Solver (CSLS) does not control the lock state as is common with many safety controllers. The next question is, “Why does the user still need […]

Cybersecurity Considerations in Safety Instrumented System Architectures

Posted in Safety on Wednesday, June 19th, 2019. No comments yet
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Safety instrumented systems (SIS), which are designed to take the process to a safe state in trip conditions, come in several architectures with the basic process control system (BPCS). The SIS and BPCS can be totally separate, interfaced or integrated, yet separate. While the debate on which approach is best has been going on for […]