MSG - PLC Programming & Automation

Wireless PLC Communication: Wi-Fi, Radios and Cellular

Timing chart of a wireless link: the radio link drops, I/O data stops arriving, the connection fault bit sets after the timeout window expires, the line stops, and everything recovers only after the link returns and the logic is reset

Wireless PLC communication done properly: choosing Wi-Fi, 900 MHz radios or cellular, RPI and timeout budgets, antennas, roaming, and link loss logic.

PLC Troubleshooting: A Method That Finds Real Faults

by PLC

Ladder rung that latches the first I/O connection fault so it survives the recovery, with a reset pushbutton

A repeatable PLC troubleshooting order: module LEDs, controller major faults, I/O connection status, forces, cross-reference, trends and Ethernet checks.

EtherNet/IP PLC Communication: Setup, RPI and Faults

by PLC

Timing chart of EtherNet/IP implicit I/O at 10 ms RPI showing producer and consumer packets against a 25 ms periodic task scan

Set up EtherNet/IP between a Logix controller, remote I/O and a drive: RPI, unicast vs multicast, MSG paths, and the fault codes you will really see.