Modules provide the interface between a computer and the physical world. There are a wide variety of modules available that perform specific functions in an industrial process. Before we can learn how to use modules in our programs, we need to understand their different properties, functions, and capabilities.
Let's begin by taking a look at some of the common Logix module properties:
- Voltage: This attribute is the difference in electrical potential between two points, measured in Voltage A/C (VAC) or Voltage D/C (VDC). When visualizing voltage, I prefer the age-old super soaker (water gun) analogy, where voltage is the pressure (the number of times you have pumped the super soaker).
- Current: This attribute is the flow of electrical charge measured in Amps (A) and Milliamps (mA). In the super soaker analogy, this is the diameter of the water gun's nozzle.
- Signal: This attribute is the...
