As the ladder logic scrolled by—a waterfall of digital switches and timers—Elias saw the glitch. A single internal relay, address 201, was stuck in a loop. With a few keystrokes, he forced the reset.
Locate the small battery compartment panel on the front face.
The FA2J manual provides detailed information on programming, operating, and maintaining the PLC. The manual covers the hardware and software configuration, programming instructions, and troubleshooting guidelines for the FA2J PLC.
The system utilizes specific base racks (often referred to as motherboards) that supply power and communication backplanes for the modules.