Introduction to PLC-5 Addressing PLC-5 Addressing is based on a 1970’s I/O Structure. To begin with, all of the I/O is in the OCTAL numbering system. In other words, there are no 8’s or 9’s anywhere in the PLC-5 I/O. To emphasize, timer files, as well as other types of Read More »
Introduction to the SLC-500 Fault Routine We usually use the SLC-500 Fault Routine to set certain values in the processor during a major fault condition. For example, if the processor faults, we don’t want the MMI (Man-Machine Interface) to display “Stale” Values. Without a fault routine, the processor might constantly Read More »
Introduction to the SLC-500 Discrete Input Interrupt The SLC-500 Discrete Input Interrupt allows you to execute a routine when certain bits on a module become true or false. This allows for high speed processing of certain logic under specific conditions. For example, if the operator presses an E-Stop. The E-stop Read More »
Introduction to the SLC-500 Selectable Timed Interrupt The SLC-500 Selectable Timed Interrupt allows you to guarantee the execution of a routine in a given amount of time. For example, we might have a PID instruction that we need to execute every 50ms. We cannot guarantee the execution time of standard Read More »
Introduction to FactoryTalk View Global Objects Using FactoryTalk View Global Objects, you will create a single object that you use many instances of in your project. For example, consider a tank farm. You might create one tank object that you use for 32 different tanks. Any change you make to Read More »
Introduction to FactoryTalk Audit Trail Error In summary, I received a FactoryTalk Audit Trail Error when creating a runtime. I’m using FactoryTalk Vew ME Version 11. I’m creating the runtime for an older Panelview or FactoryTalk View ME Station. Specifically, the error was: See Rockwell Automation Knowledgebase Answer ID 1041447.ERROR: Read More »
Introduction to Numeric Input for a Timer In this section, we’ll discuss how to set up a Numeric Input for a Timer in ControlLogix. I’ll use FactoryTalk View ME. As you know, the time base for timers in ControlLogix is in Milliseconds. This is not very intuitive for an operator. Read More »
Introduction to Delaying an Output On and Off Today, we’ll discuss delaying an output on and off. In this case, I have a heater in the office, and a blower (fan). When the heater energizes, the blower (fan) will start after 2 minutes. This allows the heater time to warm Read More »
Problem Installing RSLogix 5000 v16.04 Installing RSLogix 5000 v16.04 is necessary to run the latest firmware for the 1756-L55 processor under windows XP. This version allows you to use Add-On Instructions for the L55 processor. If you are running Windows 7 or Windows 10, consider installing version 16.05. Several of Read More »
Introduction to the ControlLogix Enhanced Select (ESEL) Instruction All things considered, the ControlLogix Enhanced Select (ESEL) simply selects between tags to choose the best suited value to use in logic. For example, if you have two process variables for a PID, you might select the lowest, highest, or average of Read More »
