PLC Programming for Beginners

Explore Siemens PLC ranges from low to high, including S7-200, Logo, S7-1200, S7-300, S7-400, and S7-1500, and their programming tools, IEC 61131-3, and languages like ladder, FBD, structured text, IL, SFC.

Learn to create a TIA Portal project for Siemens PLC programming, configure CPU 1214C DC, assign input and output addresses (percent I / percent Q), and test ladder logic online.

Explore latching in PLC programming by using a parallel no contact to hold the output after input release, with push buttons to set and reset the memory.

Explore how plc data memory stores and manipulates data across bit to long formats, and how percent m addressing accesses bits, bytes, words, and long data.

Demonstrates pulse timer (PT) producing a time-limited output pulse on input, and retentive ON-delay timer (TONR) preserving elapsed time after input release until reset.

Master comparison instructions in plc programming by using equal, not equal, greater than, less than, and in range tests on multi-bit and text data to drive outputs.

Learn how conversion instructions in PLCs convert data types for calculations, ensuring matched inputs, with integer and real conversions, and use round, ceil, floor, and trunk.

Explore math instructions for PLC programming, including add, subtract, multiply, divide, mod, calculate, negate, min, max, and limit, demonstrating numerical operations on multi-bit variables within block-type instructions.

Explore program control instructions in PLC ladder logic, including jump, label, jump list, switch, and return, to control execution flow and route logic based on conditions.

Explore analog input configuration on a Siemens plc, converting 0–10 V or 4–20 mA signals to 0–27648 with norm x and scale x, outputting a real value for control.

Learn to wire and program PLC analog outputs, drive a motor via 0–10 V signals, and use norm x and scale x with real-to-integer data for precise control.

Explore the PID concept—proportional, integral, and derivative control—for analog inputs and outputs in a closed-loop PLC system, illustrated by car speed and water pressure examples.

Implement pid control in TIA Portal with the pid compact instruction inside a cyclic interrupt block, using setpoint, scaled input, and output pwm for real-time digital output control.

Achieve the set point by controlling an analog output with PID driven by input signals; use the commissioning option to visualize signals and tune the PID values.

Discover how Siemens TIA Portal uses organization blocks—program cycle, startup OBs, and interrupt OBs—to manage cyclic execution, and function blocks with memory alongside data blocks for reusable logic.

Access the PLC online without uploading the program, view the logic on your computer, and check diagnostic status and IP information to troubleshoot efficiently.