Programmable Logic Controllers: Program Entry Testing and Modification Part 2

Identify what should be done when a PLC’s hardware or software configuration is changed. Illustrate how to use a PC hard drive for program backup. Explain how to use the electrically erasable programmable read-only memory, or EEPROM, of PLCs for program backup. Describe the process for changing the PLC program while the system is in Program mode. Explain the difference between online programming and offline programming. Describe the process for changing the PLC program while the system is in Run mode.