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:

1. 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.
2. 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.
3. Measurement and other slow/housekeeping tasks are distributed across cycles.
4. 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.