Every PLC and HMI tutorial on plctr.com: project setup, ladder and structured text, communication, troubleshooting and commissioning, written from the plant floor.
XIC and XIO instructions are one of the most used basic instructions in plc ladder programming. It is in the category of bit instruction and bit instructions can be used in input and output tags. If you have a digital input, we can define and use these inputs in the PLC using the XIC instruction … Read more
If you want to be a good PLC programmer, you will search and you need have start immediately work, how you will work and how you will do, you will learn in this article. How do I become a plc automation programmer? You can use emulator programs to learn PLC or look at sample plc … Read more
DeviceNet will not function correctly if design rules are not followed. Even a Network previously thought to be functioning correctly may begin to exhibit abnormal or anomalous operations due to incorrect system design. Termination Resistors A termination resistor equal to 121 Ohms 1%, 1/4W must be attached at each end of the Trunk cable. The … Read more
After installing TwinCAT 3 on your computer, The TwinCAT 3 icon will appear in the lower right corner. In the menu that opens by right-clicking the icon, select the TwinCAT XAE option to open a new project. You can use the link below to download the Beckhoff Twincat 3 program. … Read more
We can very easily perform many operations such as creating an error routine with indirect addressing method in PLCs, recipe system, and methods of storing the data we have. What is indirect addressing, in a briefly understandable way; The process of selecting the elements of an array by an index number can be called indirect … Read more
If you are using Control Logix plc, we will make a flip-flop example with AOI. I will show you how to easily make a flip-flop block with add-on instructions. Normally, you can use one Timer On and one timer-off instruction for the flip-flop circuit. But creating a new one for each flip-flop circuit would be … Read more
How easy it is to automatically create an i/o table in CX programmer the i/o table is a snapshot of the i/o and communication modules on a CPU bus and associated configurations and settings. Right now I have a CX program or project file open that is empty of any settings To create an I/O … Read more
In order to upload a program to the PLC, you must first be able to connect to the PLC. If you do not know how to connect to a PLC, I recommend you to read the article on how to connect to a PLC on our site. In this article, I will talk about how … Read more
Experience or knowledge is needed to troubleshoot plc issues. In order to find the errors on the machine, it is necessary to know the machine. There may be many reasons for fault diagnosis or breakdown in PLCs. You can use the diagnostic LEDs on the plc for errors or you can take advantage of the … Read more
When you buy the plc CPU for the first time, you need to upgrade to the appropriate version for your program. If your program is written with version 30, you need to upgrade your CPU to version 30. CPUs come as version 1 by default. You can easily upgrade the CPUs of PLCs with Firmware … Read more
If the controller (usually 1756-L7x ControlLogix and over ) has a USB port that uses a Type B receptacle. The port is USB2.0 compatible and runs at 12 Mbps. to use the USB port of the controller, you must have RSLinx® software, version 2.56 or later, installed on your workstation. Use a USB cable to … Read more
What is First Scan Bit and How to create a tag? This bit is activated every time the PLC switches to run mode, as the name suggests, the first scan bit. You don’t need to create any tags for the first scan bit. When we look at what we can use this bit for; Where … Read more