SESAutomation & Control

Dual redundant PLCs and pressure transmitters

Hot-standby PLCs with paired transmitters avoided a shutdown within the first day of go-live, giving operators fault tolerance and confidence.

Outcome

A pressure fault on start-up was absorbed by the redundant PLC pair and transmitter voting, preventing an unplanned stop and proving the resilience approach from day one.

Highlights

  • Dual PLCs with hot-standby changeover and diagnostics visible on HMI.
  • Redundant transmitters with 2oo3 voting and clear maintenance prompts.
  • Commissioning playbook documented swaps, bypass rules and alarms.