Flashing the Firmware of a Programmable Logic Controller (PLC) is one of the fundamental setup tasks every control engineer must go through. That being said, flashing the firmware is not as straightforward as one might think. You need to know which software to use, which version of firmware to choose, know how to connect to your processor and which procedure to follow.
This is a companion discussion topic for the original entry at https://www.solisplc.com/tutorials/flashing-plc-firmware-complete-guide-for-an-allen-bradley-compactlogix-plc