Episodes
51
Latest episode
Jun 2026
Language
EN-US
Welcome to the Kenexis Functional Safety Podcast! I'm Ed Marszal, President and CEO of Kenexis, a leading technical safety consultancy for the chemical process industry. With decades of experience in safety instrumented systems, I bring a unique perspective to this podcast, having actively contributed to the ISA 84 committee since 1994. In this inaugural season, we'll delve into the IEC 61511 standard, examining each word's significance. I'll provide detailed insights into the standard's interpretation and application, complemented by personal stories from my career and committee discussions.
At the risk of saving you from hours of unnecessary work, in our latest episode, we tackle a surprisingly common habit: trying to do application program design and implementation at the exact same time. Tune in to hear why this happens, why it's a problem, and how to stop doing it!Grab your headphones and let's streamline your workflow!
Designing software comes before writing it. We're still inthe design phase and will be for a bit…Listen in to this episode as the discussion of this topic continues.
To clarify, the standard separates application program design from its actual implementation. It feels like a bit much…Join us for our 50th episode as this is discussed in more detail!
The startup sequence of a Safety Instrumented System (SIS)represents a critical vulnerability phase, as it triggers initialization code that rarely executes during steady-state operation.Join us as this important topic is discussed in this episode.
The first technical safety standard ISA84 didn’t talk about programming in it at all. So, we decided when we added it, wewould wildly over complicate the situation…
Do not incorporate human failure into your SIL verification calculations, it will actually lead you to do the wrongthing.In this episode, this important topic is covered by our industry expert as he discusses these sections and shares his vast knowledge and experience.
When it comes to SIL verification calculations, we look at Clause 11.9. It’s appropriately titled 'Quantification of Random Failures'…putting the focus on 'random' right there in the name.
A device should never remain in bypass indefinitely. Bypass duration must be time-limited, and appropriate compensating measures must be implemented. Listen in for more information and thoughts on this important topic.
The design shall allow for testing of the SIS either end to end OR in segments meaning you could test one piece at a time, but when you do that, you have to be very careful…Tune in as this topic is explored in greater detail, covering Sections 11.8.1 to 11.8.3 in this episode.
Many users of generic, off-the-shelf PLC logic solvers for Safety Instrumented Systems are surprised to learn that maintenance and engineering interfaces are not permitted to be connected while the process is in operation.Join us as section 11.7.3 is discussed in more detail.
Claim this listing to keep it up to date, reach guests who want to pitch you, and manage bookings with Guestify.
Claim this listing
