Introduction to Interlock Bits (Internal Bits) If you are not familiar with basic instructions yet, please visit the post on how basic logic works. Interlock bits are tags in the processor that represent the fact that a certain condition has been made. For example: If all guard gates are Read More »
Introduction to the One Shot Instruction (ONS) The ONS instruction is used to trigger an event. It allows logical continuity for one scan when the instruction is true. After this, the instruction goes false until it is shut off (reset). The ONS instruction is commonly used with Latch/Unlatch Read More »
Introduction to Latch Logic The Latch/Unlatch instructions are retentive. This means that once the latch instructions goes true, the bit remains ON. Even when the instruction goes false, the bit will still remain a 1 until we unlatch the bit. Also, if we take the processor to program mode, Read More »
Introduction to Seal Circuits Seals and latches allow you to momentary press a button to energize an output. The output stays on until you press another button to shut the output off. There are some dangers associated with the latches that we will also discuss. If you are Read More »
Introduction to Basic ControlLogix Instructions An easy way to learn Basic ControlLogix Instructions is to understand how to convert logic to English. Before we do this, we need to understand three basic instructions: XIC, XIO, and OTE. The XIC (Examine if Closed, or Examine On) instruction can look at any Read More »
