Handbook of microcontrollers by Predko, Michael

Programming industrial control systems using IEC 1131-3 by Lewis, R. W. (Robert W.)

Available for University of the Philippines Diliman via IET Digital Library. Click here to access
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Design with PIC microcontrollers by Peatman, John B.

WebPLC web-based industrial process monitoring and control by Abao, Emmanuel A.

Using the M68HCll microcontroller a guide to interfacing and programming the M68HC11 microcontroller. by Skroder, John C.

The M68HC11 microcontroller applications in control, instrumentation, and communication by Kheir, Michael

Programmable logic controllers principles and applications by Webb, John W.

Programmable logic controllers principles and applications by Webb, John W., Reis, Ronald A.

Technician's guide to programmable controllers by Cox, Richard A.

Programmable logic controllers principles and applications by Webb, John W.