Virtual Relays and Holding Circuits for PLCs (Part 1 of 2)

This video, provided by Columbia Gorge Community College, is the first part of a two part lecture that examines virtual relays. The main objective of the lesson is to "introduce virtual relays as employed in PLC programs[,] examine software generated holding instructions as well as set/latch and reset/unlatch commands." This video runs 13:39 minutes in length. The second part of the lesson is available to view separately.