OUTPUT_VAR_READ_INTERNALLY

Severity: info

A VAR_OUTPUT is read inside the same POU.

Why it matters. Outputs are for publishing state to callers, not internal working storage. Reading one back inside the POU usually means you wanted a local intermediate variable.

Settings. No check-specific config.

Trigger.

VAR_OUTPUT
    rResult : REAL;
END_VAR

rResult := rResult + rInput;       (* fires, rResult on the RHS *)

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🟦 info  OUTPUT_VAR_READ_INTERNALLY
VAR_OUTPUT rResult is read inside FB_Pump
An output is meant to publish a result, not to store working state.
Reading it back inside the same POU usually means you wanted a
local intermediate.

Fix. Introduce a local for the working value and assign the output once at the end of the POU.