2003 Logic Diagram
Thread Content
How to draw a fail-safe 2003 logic diagram with a bypass switch? Could someone who knows how to draw do this for me? Thank you!
1. Two-out-of-three voting: Both DCS and SIS generally have modules for this; it’s quite simple； 2. The logical function block has nothing to do with fail-safety; it is related to the fault status bits of the sensing elements, actuating elements, and logic operators’ inputs and outputs! There is no concept of fail-safe for intermediate logical variables within logic operators.