networking - PLC Programming & Automation

PLC Networking: Switches, VLANs, DLR Rings and Ports

September 13, 2026February 1, 2024 by PLC

Timing chart of a DLR ring during a cable break: link A drops, the beacon times out, the ring fault flag sets, and the I/O connection stays up throughout

PLC networking done properly: switch features that matter, an address plan, VLANs, DLR rings with 1783-ETAP, PROFINET RT and IRT, NAT and port numbers.

Wireless PLC Communication: Wi-Fi, Radios and Cellular

September 13, 2026January 4, 1970 by PLC

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.