Introduction to the ControlLogix AND Instruction From what we learned in grade school, we would think the ControlLogix AND Instruction might be confusing. In those post, we’ll discuss the ControlLogix AND Instruction, and the ControlLogix OR Instruction. For example, 7 and 3 equals 3. Likewise, 6 and 4 equals 4. Read More »
Introduction to ControlLogix Permanent Daylight Saving Time Congress is currently passing a recommendation that the US maintain daylight saving time. This means that at some point, you will no longer need to go back to standard time if you choose to follow this recommendation. The plan is to pass a Read More »
How to Hire the Best Technicians When determining how to Hire the Best Technicians, there are many factors to consider. Knowledge is just one of those factors. I’ve been training technicians for over 20 years. Of course I’m not an expert on this subject of hiring. Therefore, these are just Read More »
Introduction to the Structured Text Counter (CTUD) We use the CTUD in Structured Text, or in Function block to count up or down. CTUD is the instruction for the Count Up/Down Counter. One instruction will work both ways. Each time the CUEnable bit goes true, the counter increments. On the Read More »
Introduction to ControlLogix Up/Dn Accumulator (UPDN) The ControlLogix Up/Dn Accumulator (UPDN) instruction might seem a little confusing at first. It’s operation is very simple though. For example, we have two flow rates of a tank. The first rate is flow in. Likewise, the second rate is flow out. We can Read More »
Introduction to TOD and FRD Instructions We use the TOD and FRD Instructions to convert a value to and from BCD. Specifically, the TOD converts to binary coded decimal. Likewise, the FRD converts from binary coded decimal. Binary Coded Decimal (BCD) uses a bit pattern to represent a value. Every Read More »
Introduction to ControlLogix Security In this section, we’ll discuss the topic of ControlLogix Security. This post will not go in depth. However, we will discuss some simple things you can do. Today much of the industry is a target for cyber attacks. For this reason, you will want to think Read More »
Introduction to RSView32 with ControlLogix In this section, we’ll be using RSView32 with ControlLogix. RSView32 is an HMI interface. That is to say, it’s for humans to interface with machines. With RSView32, you might display data in the processors memory. That way, a machine operator can read values such as Read More »
Introduction to the ControlLogix Totalizer (TOT) The ControlLogix Totalizer (TOT) tracks the total amount of a product. In this example, we’ll have an input of barrels / second. However, you can change the time base of the instruction to reflect minutes, or hours. The ControlLogix Totalizer (TOT) is available in Read More »
Introduction to Scaling Data in Ladder Logic with ControlLogix In this section, we’ll be Scaling Data in Ladder Logic. Scaling simply means that we convert a raw value into engineering units. For example, 4-10mA of input will give us a raw value of 3277 to 16383. This number does not Read More »
