PID offset
PID offset is a steady gap between PV and setpoint that proportional-only action leaves behind. The three reasons a loop with integral still holds offset.
What it means
Offset is what a proportional-only controller leaves behind. Proportional action produces output in proportion to error, so it needs error to produce output — the loop settles where the proportional term balances the load, not at setpoint.
Integral action exists specifically to remove offset. A loop showing persistent offset either has no integral action, has integral action so slow it has not finished, or has an output sitting at a limit where no amount of integral action can help.
Questions that come up
What is PID offset?
PID offset is a steady gap between PV and setpoint that proportional-only action leaves behind. Integral action exists to remove it. A loop with integral that still holds offset has no integral, integral so slow it has not finished, or an output sitting at a limit.
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Written by PIDSnap control engineering. Published 2026-08-01, last reviewed 2026-10-22.