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1. What is PLC? Programmable logic controllers, also called programmable controllers or PLCs, are solid-state members of the computer family, using integrated circuits instead of electromechanical devices to implement control functions. They are capable of storing instructions, such as sequencing, timing, counting,…
Documentation is the process of orderly collection and record of data about machines or process and about both hardware and software components of its control system. Such documents are a helpful guide in the design, implementation, deployment, testing, and maintenance of applications….
Consider a simple application of water tank level measurement application using sensors. We put one near the bottom and one near the top, as shown in the picture below: The final element is configured to be a highly reliable valve and to retain…
PLC ladder logic programming language is a collection of many instruction sets. To become a programmer in ladder logic one have to know more about the list of the instruction set that can be used at appropriate positions. The journal discusses the…
What is Counter? Counter is an element designed simply to count events in PLC, however, depending on the manufacturer, there may be three types of counters in general: Up counters which only count upwards (1, 2, 3, …) and which are usually…
The PLC reads inputs, processes them, and produces outputs through a program Using a portable device, console, or personal computer, the internal operation of a PLC can be tracked and many indicator lights are provided for troubleshooting. Here are the steps for…
To interface PLC with SCADA first we have to establish a proper communication channel. The monitoring PC’s communications or network port link is connected with the cable (usually) that connects to the PLC. The next step is to ensure that both the…
What is PLC Timers? PLC timer is an element in ladder logic programming taken from electrical systems. Timers are devices that count time increments. The timer creates a delay in both PLC programming and in relay boards on connection or instantaneous disconnection….
What is Modular PLC? A Modular PLC consists of multiple modules such as CPUs, I/O modules, Power modules which are connected to a popular rack. It can expand the capacities of I / O. The modular PLC is versatile and for this…
1. What is PLC? PLC stands for Programmable Logic Controllers, PLC is an industrial computer used to monitor inputs and to regulate (turn on / off) their outputs to automate a device or process, depending on their state making choices based on…