Sensor lags, transmitter damping, and PID signal filters can make oscillations look better but is this really a good a thing? Here we look at how these dynamics affect what you see and how much of a problem it can be.
For the next few weeks, Managing Editor and blogger Nancy Bartels be reporting from the original Silicon Valley, the neck of land between the Firth of Forth to the east and the Firth of Clyde on the west, marked on one side by Edinburgh and the other by Glasgow.
What comes at you too fast? How do people know you are a process control engineer? What is more disturbing than talk shows? Is a flea market indicative of a project behind schedule? These and other questions you have not asked will be answered.
The Nuclear Energy Institute (NEI) has filed a rulemaking proposal with the NRC to REDUCE the number of systems and components to assess for cyber security. Given that nuclear plants are such high value targets and there are so many current malware attacks against control systems, this doesn't make any sense.
There is little information on frequency of ICS cyber attacks. HAVEX and BlackEnergy have been targeting selected ICS vendor HMIs that could be used to give remote access to the attackers. Once your computer is owned there's not much the attacker can't do.
Before the 1990s relatively few choices in PID structure were offered. There were also various supplier specific rules as to how to set the proportional mode and integral mode tuning settings to get proportional-only and integral-only control. A different model controller may have been needed for a different structure.
The Convenor of IEC TC57 WG15 sent a note to ISA99 stating that the power industry organizations have additional or different security situations that are causing us to create our own security standards and guidelines. Other than for compliance reasons (NERC CIP), the power industry is NOT different than other...
The highlights from the 2014 ICS Cyber Security Conference can be found at www.icscybersecurityconference.com. Conference presentations and discussions included actual ICS cyber incidents, new ICS cyber vulnerabilities, and new ICS cyber security technologies.
Not knowing the implications of the PID Form in an existing control system being migrated or the PID Form learned in a University course can cause gross errors in the tuning parameters and potential instability. The PID Form predominantly used today is not the Form in most of the controllers...