POINTER_ARITHMETIC

Severity: warn. PLCopen: E2 — pointer arithmetic shall not be used.

A binary +, -, *, or / is applied where at least one operand is a POINTER TO … typed local. Arithmetic on POINTER values is non-portable across vendor runtimes (sizes and strides differ), and most "I need to compute an offset" code is better written by indexing into a sized array.

Settings. No check-specific config. The check tracks POINTER-typed declarations in the symbol table and matches operands by their leading identifier (so pAddr + 1 and pAddr.foo + 1 both fire).

Trigger.

VAR pAddr : POINTER TO INT; END_VAR
pAddr := pAddr + 1;                    (* fires *)

The bot posts.

🟧 warn  POINTER_ARITHMETIC
Pointer arithmetic on 'pAddr + 1' (PLCopen E2)

Fix. Use ARRAY indexing or a typed buffer wrapper instead of pAddr + n.