Introduction to ControlLogix BSR — Kill the Bit (with Bit Shift Right) In this section, we’ll cover the ControlLogix BSR — Kill the Bit. This is a very simple game from the 1970s. Computers, such as the Altair 8800 and IMSAI 8080 have a front panel display. This LED Display Read More »
Introduction to ControlLogix Rate Limiter (RLIM) We use the ControlLogix Rate Limiter (RLIM) to slow the rate of change from a tag. For example, if the operator changes a setpoint, we might not want to feed the new setpoint directly to a PID. This could cause a large bump in Read More »
Introduction to the ControlLogix Lead/Lag Instruction (LDLG) The ControlLogix Lead/Lag Instruction (LDLG) is useful in PID Loops. We might use this with the FeedForward (FF), or Bias input. The purpose of the Feed Forward is to anticipate changes. For example, if our load changes, we can immediately offset the output Read More »
Introduction to Ladder Logic in Plain English Sometimes, its easier to think of Ladder Logic in Plain English. With a little practice, you can easily speak ladder logic. In this case, we’ll use simple generic addressing. It’s important to realize, though that you should have descriptions on your logic. This Read More »
Introduction to ControlLogix Rate Calculation In this post, we’ll do a simple ControlLogix Rate Calculation. We’ll be doing this in ladder logic. In this case, we’ll have a changing value, such as counts from an encoder. We’ll use ladder logic to calculate the rate of the pulses. However, another way Read More »
Answering the question: What is a Subnet Mask? When working with Ethernet Addressing, you might be asking, What is a Subnet Mask? Simply put, the subnet mask, or net mask separates the network portion of the address from the device on the network. We also consider a device to be Read More »
Introduction to creating a FactoryTalk View ME Backup We create a FactoryTalk View ME Backup using the Application Manager. This should already be on your computer. It’s important to periodically backup your project if you continuously make changes. Additionally, you might create a backup to move the project to another Read More »
Introduction to ControlLogix Structured Text Timer In this post, we’ll cover the ControlLogix Structured Text Timer. ControlLogix supports 4 programming languages: Ladder, Structured Text, Function Blocks, and Sequential Flow Charts. Some vendors prefer structured text over ladder. One reason for this is that they can develop the program without a Read More »
Introduction to ControlLogix Level 2 Training ControlLogix Level 2 Training is for those who have completed Level 1 (Maintenance and Troubleshooting). This includes troubleshooting data across PLC systems, Indirect Addressing, Function Blocks, and PID. You will also learn how to navigate Add-On instructions. ControlLogix Level 1 Review Typically, we’ll start Read More »
Introduction to Custom ControlLogix Training A good Custom ControlLogix Training class will use your own plant programs and schematics. Obviously, an instructor isn’t going to know everything there is to know about every system in your plant. However, they should be able to take the time to show the students Read More »
