PhotoResistor with LM393 Comparator

Introduction to PhotoResistor with LM393 Comparator We’re going to set up a PhotoResistor with LM393 Comparator circuit in this post. This would be a typical use for a comparator such as the LM393. Basically, almost anytime we need a discrete (on/off) condition that we base on a variable voltage, we […]


PlantPAx with Ladder Logic

Introduction to PlantPAx with Ladder Logic There might be several reasons you need to use PlantPAx with Ladder Logic. If your site does not have a license for function blocks, then you might want to use ladder logic. Additionally, some factories will simply prefer to use Ladder logic over function […]


ControlLogix FIFO Instructions

Introduction to ControlLogix FIFO Instructions The ControlLogix FIFO Instructions are a buffer that allow you to take snapshots of data. The processor stores this data into an array. When we unload the register, the first piece if information will unload first. The processor will send this data to the destination […]


ControlLogix File Search Compare

Introduction to ControlLogix File Search Compare The ControlLogix File Search Compare will search through arrays for specific conditions. Element by element, the instruction will look to see if a specific expression is true. For example, we have an array of temperatures. We want to check for any temperature that is […]


ControlLogix File Bit Compare

Introduction to ControlLogix File Bit Compare The ControlLogix File Bit Compare instruction searches for mismatched bit between the source and reference tags. There are several uses for this instruction. One use would be for alarms. We can compare the source value against a reference of 0. in this case, the […]


ControlLogix Sequencer Instructions

Introduction to ControlLogix Sequencer Instructions ControlLogix Sequencer Instructions, such as Sequencer Input (SQI) and (SQO) walk through a set of instructions, and wait for specific conditions to make. For some projects, sequencers might be the entire programming strategy. Basically, the SQO instruction will energize a set of outputs. When the […]


ControlLogix Bit Shift Instructions

Introduction to ControlLogix Bit Shift Instructions ControlLogix Bit Shift Instructions will shift bits in an array to the left or to the right. Of course this depends on which instruction you use. Obviously, Bit Shift Left (BSL) will shift the bits in an array to the right. On the other […]

Bit Shift Left

PLC-5 I/O Configuration

Introduction to PLC-5 I/O Configuration It’s important to realize that you do not have to set up PLC-5 I/O Configuration for your project to work. There are advantages, however for taking the time to document the modules in each chassis. First, it’s a more visual way for a troubleshooter to […]

I/O List

FactoryTalk Function Key Assignments

Introduction to FactoryTalk Function Key Assignments FactoryTalk Function Key Assignments allow you to assign function keys to objects on your graphics display. It’s important to realize that some panelview terminals do not have a touch screen. In this case, we need a different way for the operator to interact with […]

FactoryTalk Function Key Assignments

PLC-5 Data Files

Introduction to PLC-5 Data Files PLC-5 Data Files store data. On the other hand, PLC-5 Program Files will manipulate data. In this section, we’ll discuss each type of default data file. At the same time, we’ll talk about various instructions that utilize each data file. It’s important to realize that […]

PLC5 Data Files