In a Paper360 magazine article, "Wireless Sensors Improve Toxic Gas Mitigation in P&P Mills", Emerson’s Forrest Francis explains how workers can avoid nasty surprises. TV shows add drama saying their stories are “ripped from the headlines,” meaning they’re based...
Safety
Cybersecurity Considerations for Automation Architectures
In an Industrial Safety and Security Source article, Considerations in Choosing a Defendable Safety System Architecture, Emerson’s Sergio Diaz and Alexandre Peixoto focus on the basic process control system (BPCS) and safety instrumented system (SIS). They compare various architectures from a cybersecurity perspective.
Self-Contained Hydraulic Emergency Shutdown System
A safety instrumented function (SIF) in a safety instrumented system (SIS) contains a sensor, logic solver and final element. All must function properly in the event of a safety demand to take the process into a safe state in coordination with other SIFs. The final...
Non-contacting Radar for Automatic Tank Gauging and Overfill Prevention Systems
Bulk liquid storage tanks often contain fluids that are hazardous, flammable and/or explosive. These tanks require not only a control system to control levels but and overfill prevention system (OPS) as layer of protection beyond the control system. This basic process...
Understanding Functional Safety Concepts and Final Element Suitability
The world of functional safety has its own tribal language and acronyms, e.g. safety instrumented systems (SISs), safety instrumented functions (SIFs), logic solvers, final elements (FEs), safety integrity level (SIL), probability of failure on demand (PFD), etc. In a...
Approaches to Partial Stroke Testing Safety Valves
The safety valve within a safety instrumented function (SIF) must be tested regularly to help assure proper operation in the event of a safety demand. Operators usually perform an offline full stroke test during a scheduled shutdown because of the impact of this test...
Safety Instrumented System Cybersecurity Best Practices
Emerson's Sergio Diaz and Alexandre Peixoto presented Best Practices for a Cybersecure SIS at the 2019 Emerson Exchange conference. Sergio opened that the goal of this presentation is to provide practical information to maintain a more defendable security posture for...
Security for Safety System Logic Solvers-Physical Key Switches and Software Locks
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...
Reducing Level Detector Proof Testing Complexity
Each safety instrumented function (SIF) including its sensor, logic solver and final control element must be periodically tested to make sure it will perform as designed in the event of a safety demand. These "proof tests" help to uncover and failure conditions which...
Cybersecurity Considerations in Safety Instrumented System Architectures
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....
Storage Tank Overfill Protection
Preventing overfill conditions in tanks and vessels is a job for safety instrumented systems across many industries. In a Flow Control article, A Systemic Approach to Storage Tank Overfill Protection, Emerson's Lydia Miller and AnnCharlott Enberg describe the key...
Remote Proof Testing Safety Level Switches
One of the necessities in managing safety instrumented systems throughout the IEC 61511 safety lifecycle is to perform periodic proof tests on the components in a safety instrumented function to verify proper function. A short 2:44 YouTube video, How to Remotely...
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