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PLC (Programmable Logic Controller) Basics of PLC ▪Identify the major components of a PLC and describe their functions. ▪Convert numbers from decimal to binary, BCD, and hexadecimal ▪Identify typical discrete and analog inputs and outputs. ▪Read a basic ladder logic diagram and statement list. ▪Identify operational differences between different S7-200 models ▪Identify the proper manual to refer to for programming or installation of an S7-200 PLC Basic PLC Operation ▪PLCs consist of input modules or points, a Central Processing ▪Unit (CPU), and output modules or points. ▪An input accepts a variety of digital or analog signals from various field devices (sensors) and converts them into a logic signal that can be used by the CPU. ▪The CPU makes decisions and executes control instructions based on program instructions in memory. ▪Output modules convert control instructions from the CPU into a digital or analog signal that can be used to control various field devices actuators). ▪A programming device is used to input the desired instructions. ▪These instructions determine what the PLC will do for a specific input. ▪An operator interface device allows process information to be displayed and new control parameters to be entered.
▪Pushbuttons (sensors), in this simple example, connected to PLC inputs, can be used to start and stop a motor connected to a PLC through a motor starter (actuator). For More Details SAGE Automation(Thane) "9 Mansi" Complex,Ram Maruti Road, Cross Lane No.1, Behind Lokmanya Tilak Udyan , Naupada,Thane (WEST) 400602. SAGE Automation(Pune) 1st Floor,Ramashree Apartments, Behind Shubham Hotel,Kawale Path, JM Road ,Deccan, Pune - 411004.