Introduction to Programmable logic controller (PLC), role in automation (SCADA), advantages and disadvantages, hardware, internal architecture, sourcing and sinking, characteristics of I/O devices, list of input and output devices, examples of applications. I/O processing, input/output units, signal conditioning, remote connections, networks, processing inputs I/O addresses.
Ladder programming- ladder diagrams, logic functions, latching, multiple outputs, entering programs, functional blocks, programme examples like location of stop and emergency switches
Instruction list, sequential functions charts & structured text, jump and call subroutines.
ladder programmes, battery- backed relays, one - shot operation, set and reset, master control relay.
Types of timers, programming timers, ON and OFF- delay timers, pulse timers, forms of counter, programming, up and down counting, timers with counters, sequencer.
shift registers, ladder programs, registers and bits, data handling, arithmetic functions, temperature control and bottle packing applications. Note: Discussing the programming should be restricted to only one type of PLC (Mitsubhishi)