Introduction for Proportional Settings for ControlLogix PID Enhanced (PIDE) In this section, we’ll discuss the proportional settings for Controllogix PID Enhanced (PIDE). It’s important to remember the difference between the PID in ladder logic vs. the function block PIDE. The main difference is that the ladder logic PID instruction is Read More »
Introduction to ControlLogix over the Internet In this section, I’ll show you how easy it is to connect to a ControlLogix system over the Internet without proper security. Undoubtedly, using this procedure will cause a severe security threat. The purpose of this to show how easy a simple change in Read More »
Introduction to the ControlLogix 1756-DHRIO Module The ControlLogix 1756-DHRIO module allows you to interface with the older Data Highway Plus (DH+) Network. You can also connect to a maximum of four Remote I/O Racks per channel. Each 1756-DHRIO module has 2 ports. Each of which will support DH+ or Remote Read More »
Introduction to ControlFlash Plus ControlFlash Plus is a firmware update tool. Basically the firmware is the operating system for a module. Each of your ControlLogix modules have firmware. Your controllogix project will usually require a minimum firmware revision for each module. With this in mind, when you replace a module, Read More »
Introduction to PlantPAx 4 Digital Input Instruction The PlantPAx 4 Digital Input instruction monitors discrete (digital) inputs in your system. The advantage of using a P_Din for each input is that we will display the status of the input for the operator. Another advantage is to ensure the switch has Read More »
Introduction to MCR Zones MCR Zones are difficult for some people to understand. MCR stands for “Master Control Reset”. In this post, I’ll emphasize the common misconceptions about MCR Zones, and show examples different MCR States. It’s important to realize that MCR Zones do not necessarily shut off all outputs Read More »
Introduction to Buffering Inputs and Outputs There are several reasons for Buffering Inputs and Outputs. First, the tags are easier to understand for those doing troubleshooting. Secondly, it holds data the same for one scan. Thirdly, I/O changes (Input and Output changes) to your system are easier to make. Today, Read More »
Introduction of TON and TOF Differences There are several TON and TOF Differences that you need to be aware of. In summary, the TON delays the DN bit from turning ON. The TOF Instruction delays the DN Bit from shutting off. The TON Instruction By far, the TON instruction is Read More »
Introduction to Seal and Latch Differences Today, we are going to discuss the Seal and Latch differences in ladder logic. Basically, they do something very similar. When one condition goes true, the output comes on. Likewise, when a different condition changes, the output shuts off. There are some differences, however, Read More »
Introduction to Cascading Counters By cascading counters, you can virtually have a limitless number of counts using CTU instructions. With the older 16 bit processors, the maximum count was 32767 before the counter overflowed. Using 32 bit processors, however, this maximum count for a signed DINT is 2147483647 before it Read More »
