What is the chain of command for computer systems in the power plant, and what type of system is at each level? I'm reading here about PDP-11s...at what point do they come in and whatnot...I'm getting mired down here, other websites I've visited don't really give me what I'm looking for for my research paper.

Ben

-- Anonymous, December 06, 1998

Answers

Plant IS Systems DCS System/MMI Workstations Plant Network PLCs/RTUs Single Loop PID Controller Smart Instruments/Analysers 4-20ma Analog Sensors Relay/contact closure Status Sensor

Jim

-- Anonymous, December 07, 1998