The following table describes the tag reference and TagReadEx() behavior in a Cicode expression if the quality of the tag is BAD:
| Tag Reference / TagReadEx syntax | Error Mode/Citect.ini settings | Cicode Expression behavior |
|---|---|---|
| “Tag1” | ErrSet(0) [Code]HaltOnInvalidTagData = 0 |
Tag ref returns a BAD quality value, Cicode expression continues, Error is set. |
| TagReadEx(“Tag1”) | ErrSet(0) [Code]HaltOnError = 0 |
Function returns a BAD quality value, Cicode expression continues, Error is set. |
| “Tag1” | ErrSet(0) [Code]HaltOnInvalidTagData = 1 |
Tag ref returns a BAD quality value, Cicode expression stops. |
| TagReadEx(“Tag1”) | ErrSet(0) [Code]HaltOnError = 1 |
Function returns a BAD quality value, Cicode expression stops. |
| “Tag1” | ErrSet(1) | Tag ref returns a BAD quality value, Cicode expression continues, Error is set. |
| TagReadEx(“Tag1”) | ErrSet(1) | Function returns a BAD quality value, Cicode expression continues, Error is set |
| “Tag1.V” | ErrSet(0) or ErrSet(1) | Tag ref returns a GOOD quality value, Cicode expression continues, No error is set. |
| TagReadEx(“Tag1.V”) | ErrSet(0) or ErrSet(1) | Function returns a GOOD quality value, Cicode expression continues, No error is set. |
See Also