Flow Ctrl Tech Engineering

PLC Retentive Memory & Remanence: Preventing Recipe Loss During Plant Blackouts

Deep dive into PLC memory architecture: volatile RAM, non-volatile remanent memory, supercapacitors, battery backup, and how to safeguard production setpoints.

  • Modern PLCs use internal supercapacitors to flush volatile cache to internal flash NVRAM upon power cut.
  • Only mark strictly essential tags as retentive; excessive remanence allocation slows down startup cycle checks.
  • Regularly backup recipes to industrial SD cards or supervisory SCADA historians.

Flow Ctrl Tech Engineering: Turnkey industrial automation, PLC programming, SCADA development, HMI, fieldbuses, and IIoT architectures. Contact our engineering center at [email protected] or phone +91 91110 91005.