Programmable logic control applied to a coal preparation plant complex
CIM Bulletin, Vol. 72, No. 802, 1979
L W. KRAHENBIL, Group Leader, Systems Engineering, Alien-Bradley Canada Ltd., Cambridge, Ontario
The programmable Logic Controller (PLC), at its present stage of evolution, is now considered as a mature control system. The PLC combines the solid-state reliability of hardwired logic and computer control systems with the simplicity of a relay ladder logic. Relay symbolic programming through a function-oriented keyboard provides a means which plant personnel can easily become accustomed to work with.In a large coal facility, it is shown that the control engineer can provide improved control flexibility with the advanced capabilities of the PLC.
Coal preparation, Process control, Programmable Logic Control, Control systems, Computers