Signals & Analog

Signal validation

Definition

Logic that checks whether an analog reading can be trusted, using out-of-range, frozen-value, and rate-of-change tests.

The dangerous failure is not a reading of zero, it is a believable reading that happens to be wrong. Validation catches those and lets the controller hold the last good value and alarm rather than act on bad data.

Signal ValidationCatching a failed analog input in logic before it runs a pump on a dead transmitter: range checks, module status bits, frozen-value detection, rate checks, and what the program does with a bad value.

Signal validation

Definition

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