Practical Tips and Techniques
PLC programs scan cyclically. This means that it is repeated many times and in the same order. The primary sequence of a PLC scan is reading the inputs, executing the program, diagnostics, and communication, and updating the outputs. We will look at these scan items with particular attention to how the ladder logic program is … Read more
The Productivity 2000 Series PLC uses the Productivity Suite Software. It is a complete package without restrictions or limitations. The software can be downloaded free of charge. The latest Productivity Suite software version is 3.10.2(1). Automation Direct has put over 20 years of programmable controller software experience, customer suggestions, and feedback into this programming package. … Read more
The Machine Simulator (MS) is part of the EasyPLC software suite. It has many built-in machines that can be programmed. The gantry loader is one of these machines. It will pick up metal boxes from a conveyor and place two on a wooden pallet. The Click PLC will be used to program this virtual machine. … Read more
Programmable logic controllers (PLC) use a cyclic scan. The time that it takes to complete one scan is called Scan Time. Typical scan times range from 10 milliseconds to 10 microseconds. This translates from 0.01 to 0.0001 seconds per PLC scan. Understanding how the program scan will help us in programming and troubleshooting the PLC. … Read more
EasyPLC Software Suite is a complete PLC, HMI, and Machine Simulator Software package. This PLC learning package includes a Machine Simulator (MS). This virtual 3D world with real-time graphics and physical properties can communicate to several different programmable logic controllers. (PLC) We will be developing a Click PLC program for a transfer line. This is … Read more
PLC memory is very similar to personal computer memory. There is the operating system and firmware of the processor and connected modules. PLC programs and data that are used by the program are also stored in the memory. We will now look at the basic understanding of memory in the PLC. Looking at two examples … Read more
