Tag values reset to zero
Modifying a user-defined data type that is referenced by a tag could affect the value of the tag(s) referencing the type.
- Values are reset to 0 if the size of the data type changed.
For example, when adding or deleting a member, or changing a member’s data to a new type that is a different size (for example, BOOL to REAL), then the value is reset.
- Values are not reset to 0 if the size of the data type does not change.
However, the system preserves the current values. If a structural change was made, check the values for validity. For example, when modifying a member’s name, values are preserved. When modifying a member’s data type from DINT to REAL, values are preserved, but may no longer be valid for that member.
Provide Feedback