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PLC ( Programmable Logical Controller )
PLC stand for programmable logical controller. PLC is an industrial computer used to monitor inputs and depending upon their make decisions based on its program to control its outputs to automate a machine or a process. In another way a PLC may be called a digitally operating electronic apparatus because it is basically used a programmable memory for the internal storage of instructions by implementing specific functions such as logic sequencing. Timing counting and arithmetic to control various types of machines. They are used in many industries such as oil refineries manufacturing lines conveyor system etc.
Give the register organization of 8257? The 8257 do the DMA operation over four independent DMA channels. Each of the four channels of 8257 has a couple of two 16-bit registers
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8 bit data to memory This form of the instruction is used to copy 8 bit data directly to the memory location pointed by register pair HL. The instruction format is
Explain the purpose of the I/O instructions IN and OUT. The IN instruction is used to move data from an I/O port into the accumulator. The OUT instruction is used to move d
PRINCIPLE OF LED
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Q. Explain working of Digital Process Control? Figure shows a block diagram for microcomputer-based control of a physical process, such as a chemical plant. A slight variation
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