Horner XL4 Rotate and Shift Register

The Horner APG XL4 all in one controller has several different instructions to shift and rotate the bits, bytes, words or double words in the memory. We will be discussing the bitwise operations of the shift and rotate instructions. Looking further into the move operations we will look at the Element Rotate and Element Shift instructions … Read more

Horner XL4 Program Control Instructions

We will now look at program control in the Horner XL4 all in one controller. PLC programs scan usually from left to right, top to bottom. The outputs from the previous rung are available for the next. This is the operation of a PLC. Program control instructions allow us to add or remove parts of … Read more

Horner XL4 Math Instructions – All In One

Math instructions in the Horner APG XL4 OCS all-in-one controller are broken down into Basic Math Operations and Advanced Math Operations. Basic Math Operations include the following: Math Equation Element, Add, Subtract, Multiply, Divide, Modulo, Square Root, Absolute Value Advanced Math Operations include the following: Power of X, Base 10 Logarithm, Power of e, Natural … Read more

Horner XL4 Compare and Move Instructions

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

Horner XL4 Timers and Counters – All In One

Timers and counters are used in the majority of PLC programs. We will not look at how timers and counters can be programmed in the Horner XL4 OCS all-in-one controller.

Horner XL4 User Interface – All In One

We will now look at the Horner XL4 user interface. The HMI (Human Machine Interface) part of the XL4 all in one controller will be what the operator views. We will look at the features of the display and learn how our program will control what the display will show.