Error FFB comes due to overflow or arithmetic error. Below is the possible reason.
- a result greater than + 32 767 or less than - 32 768, in integer (INT),
- result greater than + 65 535 or less than 0, in unsigned integer (UINT),
- a result greater than + 2 147 483 647 or less than - 2 147 483 648, in double integer (DINT),
- result greater than +4 294 967 295 or less than 0, in double unsigned integer (UDINT),
- real values outside limits,
- division by 0,
- the square root of a negative number,
- Forcing to a non-existnet step on a drum,
- Stacking up of an already full register, emptying of an already empty register.
Refer the below possible steps to diagnose the issue.
- Open the diagnostic viewer which is available under tool menu or press Alt key + F6.
- Diagnostic viewer is opened. Review the Error FFD and click on it. Description of error is showing under description window.
As per above screen shot, it shows the details of FFB error which is coming due to invalid input scale parameters of scaling block. This block is called in Scaling section and its position is I:27 and C:52.
- By select initialize editor option which is available by right click, CE navigate you directly on the section where event was triggered.
Refer the below screen shot which shows the location of scaling block as described in diagnostic viewer (I27 and C52).
Verify and make corrections in the program as per error.
Released for:Schneider Electric India
