#miniplc

PL-100 mini programmable logic controller by GIC India is a real-time system designed for multiple inputs and output arrangements. The PL-100 monitors' inputs and changes outputs as controlled by the user program, including Boolean logic, counting, timing, complex mathematical operations, and communication with other intelligent devices. 

Features:

Supports up to 112 IOs

Relay Base & MOSFET Low Side Base modules

Stacking using FRC cable up to maximum 6 Expansion Modules

Isolated Digital Inputs with sourcing & sinking capability

Isolated Digital Transistorized Outputs (Low Side and High side driver)

High-Speed Inputs – Single / Quadrature (1x/2x/4x)

High-Speed Outputs (PTO / PWM / S-Profile)

Analog Voltage/Current Inputs and Outputs of 0-10 V / 4-20 mA

PC Software for programming, online & offline simulation

Standard RS232/RS485 port with RJ11 for HMI/SCADA Interface

Mini PLC has Modbus RTU support

128 Weekly, Monthly & Yearly Time Switches each

The programmable Logic controller is used to monitor inputs and depending upon their states, it makes decisions based on its program or logic so as to control (turn ON/OFF) its outputs to automate a machine or a process.

At the heart of most industrial control and factory, industrialization systems is a programmable logic controller (PLC). Commonly referred to as the “brain” of a factory, a PLC controls a wide range of functions by receiving and processing data from sensors and machines. It then uses this data to control and actuate external devices.

The programmable logic controller is an industrial solid-state computer that monitors inputs and outputs and makes logic-based decisions for automated processes or machines.

Initially, industries used relays to control the manufacturing processes. The relay control panels had to be regularly replaced, consumed a lot of power and it was difficult to figure out the problems associated with it. To sort these issues, the Programmable logic controller (PLC) was introduced.

PLC Hardware 1 to 5:

Input Module: Inputs are data given to PLC, classified in Digital IP: Switch, Push Button, Proximity Sensors, etc which gives input of either 1 or 0 to PLC Analog IP: Every analog sensor like Temperature, weight, distance, etc which gives analog data to PLC Output Module: Output from PLC, classified in Digital op: output signal either 1 or 0 Analog op: the variable output of 0 to 12 VDC or 4mA to 20mA DC. CPU: This component act as the brain of the system. CPU consist of Arithmetic Logic Unit, Program memory, Process image memory, Internal timers and counters, flags It receives information from the I/P device, makes decisions depending upon the information and logic written and sends information through the O/P devices. Power Supply: Certain PLCs have an isolated power supply. But, most of the PLCs work at 220VAC or 24VDC. Memory: Stores the information about the status of input and output devices, and the values of timers, counters, and other internal devices. Programming Device (Computer): This device is used to feed the program (logic) into the memory of the plc. First, we make a program in certain PLC software then we download it to PLC. PLC Programming: It is a logic we make in Computer in PLC software. Based on that logic & conditions PLC gives output. Most commonly used programming language is Ladder diagram (LD) also known as Ladder logic

Typical Ladder logic:

Here the input is push button & output is light, so when PB is pressed due to the logic of PLC light will be turned ON.

Typical PLC

PLC can be used in almost all industrial application solutions right from small machines to large manufacturing plants. Even it caters applications of redundant systems at critical process plants.

Advantages of PLC: