Free pre-flight check

Sixteen checks against the loop's configuration, run before any test. They find the things no amount of tuning will fix — derivative on a fast loop, reset faster than the dead time, a valve already running wide open.

Read it from a picture

Photograph the faceplate with its detail page open and we will fill the form in to check. Still free, still no signup.

Read it from a picture

Only the first few fields are required. Everything else sharpens the analysis, and the report tells you which checks it had to skip for want of an answer.

The loop

Loop tag

As it appears on the faceplate, e.g. FIC-101.

Loop type

What it controls (optional)

e.g. reactor feed flow.

Controller structure

Your controller's conventions

This is the part that determines whether the advice reads correctly on your system. Proportional band and gain move in opposite directions, and so do repeats-per-minute and minutes-per-repeat.

Control system

Proportional is expressed as

Reset units

Rate units

Algorithm form

Current tuning, exactly as shown on the faceplate

Proportional value

Reset value

Enter 0 if integral action is switched off.

Rate value

Enter 0 if derivative is off.

Range and operating point (optional)

PV range low

PV range high

PV units

Normal operating PV

Output low limit (%)

Output high limit (%)

Field devices (optional)

Transmitter damping (seconds)

Controller PV filter (seconds)

Valve type

Valve characteristic

Positioner

Normal valve position (%)

Drive acceleration time (seconds)

Drive deceleration time (seconds)

Is this a safety loop?

This loop is safety-instrumented, interlock-related, or feeds a critical downstream constraint

Tick this and PIDSnap will carry on working through the loop with you, but every screen will carry a reminder that these constants are usually part of a verified safety function and belong in your management-of-change process before they go anywhere near a live controller.

Other context (optional)

This loop takes part in an override or selector scheme

Would rather skip the photos and type it all in by hand? Reload the form so the photo option does not appear.