Practical Tips and Techniques
Compare and move instructions in the Horner XL4 OCS all-in-one controller can be very powerful. We will be looking at how to use these compare and move instructions. Combining these two instructions to build a sequencer, we will apply this to an application example. Our application will be a simple traffic light. The HMI screen … Read more
We will now look at the parts of a PLC system. When I was in school PLCs were just in their infancy. We were taught that the PLC consisted of the central processing unit (CPU), analog and digital inputs, and outputs. Everything was programmed with dedicated handheld devices and/or software devices on specialized hardware. We … Read more
The Horner XL4 OCS all-in-one controller is programmed using Cscape. Cscape (Control Station Central Application Programming Environment) We will now set up the Cscape software so we can easily communicate and program our controller.
The Horner XL4 OCS is an All-in-one controller. This means that this modern unit combines a logic controller, operator interface, I/O and networking all into one package. This OCS (Operator Control Station) family was first released in 1998. New features to the line-up have been added over the years. Today the OCS family has a … Read more
A lot of times when programming a PLC you need to track what has previously happened. Shift registers allow you to do just that. The Click PLC has a shift register in the instruction set. We will discuss the shift register and look at an example.
Previously we discussed the Click PLC System Hardware – Video. Today we will be installing the free software required to program the PLC. This includes the actual program and communication drivers. The current version of the Click Software programming package can be downloaded here. Installation of this package is similar to the instructions below.