Letter Re: Some Notes About SCADA Software
James The pastor/programmer is somewhat correct about SCADA and Programmable Logic Controllers (PLCs), and his resistance of Windows based and “soft logic” is admirable. However, many SCADA systems installed out there recently have been implemented just as their name implies “SUPERVISORY CONTROL and Data Acquisition” in order to save labor costs by minimizing operator and maintenance training requirements on multiple different in- plant control systems. Most major power, refining, waste treatment systems etc. in recent years have utilized a DCS (distributed control system) as a SCADA base for overall and/or supervisory control often also monitoring or commanding smaller PLC systems …