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Table Of Contents
Learning RSLogix 5000 Programming
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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 D/C (VDC). When visualizing voltage, I prefer the age-old Super Soaker (water gun) analogy in which 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, it is the diameter of the water gun's nozzle.
Signal: This attribute is the modulation in voltage or current, which relays the operational state of a device. A signal is representative of values such as pressure, temperature, and flow.
Input: This module is wired to detect the values being sent from the field to the controller. Input values are used to determine, for example, whether a motor is running and the speed of a motor's rotation.
Output: This module is wired to detect...
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