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PLCs, PLC Systems - Coggle Diagram
PLCs
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Programming Device
Program
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A series of scans to scan the input status, execute the program and changes output accordingly.
A Scan time: the time required for one full cycle, a measure of PLC response speed.
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CPU
Microprocessor
Memory
In PLC: 1K = 1024 because it's binary (instead of = 1000 like PCs) , 1K can be equal to 1024 bits, bytes or words. words can be either 8-bit words or 32-bit.
Memory Capacity is measured in words. and for this, we need to know the number of bits in each word. word sizes in PCs can be 8, 16, 32 or 64 bits.
Example: 6K + 8-bit word = 8 x 6 x 1024 = 49,152 bits of storage.
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