Sepam Series 80 Firmware Cycle Time
Issue:
Clarify the firmware execution cycle behavior for Sepam Series 80 protection relays and what functional groups execute each cycle.
Product Line:
Sepam Series 80
Environment:
Sepam Series 80 protection relays
Firmware execution of protection, logic, I/O, and measurement functions
Cause:
Project and commissioning teams require a concise description of the relay’s deterministic execution cycle to support coordination studies and to estimate end‑to‑end behavior of protection and control logic.
Resolution:
- Sepam Series 80 firmware operates cyclically and deterministically, running protection algorithms, control logic, I/O scanning, and device self‑checks in a repeating execution loop.
- Fast functions executed every cycle include the protection elements, logic input scanning, control logic (including the logic equation editor/Logipam constructs), and logic output updates, alongside device self‑diagnostics.
- Measurement and other slow/housekeeping tasks are distributed across cycles.
- When a quantified timing value is required for an engineering study, perform a bench verification on a representative relay and firmware build by toggling a digital input, driving a simple control logic action, and measuring the repeatable delay at a digital output or in time‑tagged event data. Record the firmware version/build and configuration with the results.