Introduction to FactoryTalk View Button with Multi-state Indicator By using a Button with Multi-state Indicator, you will overcome the limitation of a button’s two states. Basically, we just make the button transparent with a multistate indicator behind it. This reflects multiple states. Each state will have different colors, and different Read More »
Introduction to FactoryTalk Three State Button A FactoryTalk Three State Button allows you to write to a bit, then reflect three states. For example, we might write to a bit to start a pump. After that, the pump is starting, so we might changed from the “stopped” state to the Read More »
Modbus on ControlLogix Serial Port An inexpensive way to run Modbus on ControlLogix Serial Port is with an RS232-RS485 Adapter. In short, download Rockwell’s sample code. Apply power to the adapter, and you will be up and running on Modbus! In this case, I’m using cheap Temperature and humidity sensors Read More »
Introduction to Building the Kim Uno (Kim-1) Building the Kim Uno (Kim-1) is fairly easy, but a little bit time consuming if you don’t use a PC board. The Kim-1’s technology from 1976. It’s fun to program, however, you do have limited memory. The Kim Uno emulates a 6502 processor Read More »
Introduction to the ControlLogix BTDT Instruction The ControlLogix BTDT Instruction is a type of Bit Field Distributor. This is an acronym for “Bit Field Distributor with Target”. We use this type of instruction in Function Block Programming. If you use ladder logic programming, check out the post on the BTD Read More »
Introduction to ControlLogix Sump Pump Controller In this case, I’ve built a discrete ControlLogix Sump Pump Controller. In other words, there is no level sensor. Simply put, there is a float switch which controls the sump pump. If you have the ability to detect a sump level, then this post Read More »
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 Read More »
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 Read More »
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 Read More »
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 Read More »
