Variable Value Invalid

What does 1422 mean?

This message indicates that a variable has an invalid value during program execution. For example, if a program line like `myPos = $POS_INT` is executed, it may trigger this message if the variable `$POS_INT` holds an invalid state. The error can be suppressed by `ON_ERROR_PROCEED` in the preceding line, allowing custom error handling via `$ERR.NUMBER`.

1. 1

   Examine the program logic in the line triggering the error (e.g., line 5 `myPos = $POS_INT`) and preceding lines to understand why the variable value is invalid.

2. 2

   Verify that all variables used in assignments, calculations, or function calls have appropriate data types and are initialized with valid values.

3. 3

   If `ON_ERROR_PROCEED` is active, ensure the subsequent `SWITCH ($ERR.NUMBER)` block explicitly handles `CASE 1422` with a robust fault service function.

4. 4

   If the error occurs within an interrupt routine, investigate the context of the interrupt and the data available to the program at that time.