This means that System Q PLCs can support complex 0 Explanation :- A) ROM:- (Read Only Memory) 1) i) The common types of memory used in PLCs are Read Only Memory (ROM) and Random Access Memory 1 The memory contains data for several types of information. CPU is the brain of PLC with an octal or hexagonal microprocessor. The main modules used in a modular type PLC are the processor module, power supply module, input modules, output modules and communication modules. The relay output type is best suited for both AC and DC output devices. PLCs are evolving and continue to be the best option for a variety of industrial automation applications. Transistor output type PLC uses switching operations and used inside microprocessors.
3 PLC power supply A DC power supply is required by the PLC for low-level voltage used by the CPU, as well as for the I/O and communication modules. The memory of a PLC is organized by types.Each memory cell accepts a certain amount of bits, which are registered on the storage device as 1 or 0.ROM is used to store programs and data that should not be altered. For example: The load of PLC Memory bao gồm nhiều loại khác nhau: Work, Load, Retain memory.
0/0 Data file type I – input O – output S – status B – binary T- timer C-counter Data file number (can be omitted for the basic data files) Slot number (not used with Think of PLC memory as a cabinet with drawers called Registers. And little bit yet: SIMATIC S7-1500, ET 200MP Automation system. 2 PROGRAM VS VARIABLE MEMORY The memory in a PLC is divide d into program and va riable memory. Its easy storing procedures, handy extending principles, functions of sequential/position control, timed counting and input/output control are widely applied to the field of industrial automation control. Markers :- Siemens PLC predefined internal memory (Marker) symbol is “M”. Memory Unit is the unit that stores programs, data, and information in the PLC.