Identify the four steps a PLC performs during operation
Define the term input scan
Define the term program scan
Define the term output scan
Identify the symbols representing normally open and normally closed contact relays
Identify the two structures used for programming
Course DescriptionIn order for a PLC to control an automated machine or process, it must be given a set of instructions. These instructions, or user programs, tell the PLC what inputs to monitor, how to process the data, and how to respond to the inputs.