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ALPHA-VISION® API-Interface to Technology program: FC170 |
FC170
SUMMARY
The AbvSpu provides functions to read and write process attributes (status, measuring value, alarm information) as well as to control process parameters (limits, delay times, etc.).PARAMETERS (IN)
- obj (INT)
- Object Number
PARAMETERS (OUT)
- bVal (BOOL)
- Measuring value as 0/1-Signal
- bOk (BOOL)
- 1=okay, 0=error
PARAMETERS (IN_OUT)
DESCRIPTION
GetValueB_ex() - Reads the actual measuring value in the format <BOOL>.Returns the value of the object referenced by <obj > in the format <BOOL>.
The function is defined for Measuring Points (MP) and Process Variables (PV).
- For MP-Objects the measuring value <obj.val> is returned.
- For PV-Objects of the types <Bit/Byte/Word/Dword/Real> the measuring value <obj.val> is returned.
- For PV-Objects of the type <String> the string length <obj.strlen> is returned.
- The measuring/String length value is returned as <BOOL>.
- In case of an error <bOk=0> is returned.
- Possible error: Invalid Object Number.
Internally the value of MPs are stored as real digit, that also applies for PVs of the format <REAL>. The return value of <bVal> is calculated from the REAL-Value.
- <bVal> is 'false' for <rVal=0.0>, in any other case it's always 'true'.
Internally the value of PVs with the format <BIT/BYTE/WORD/DWORD> are stored as INTEGER. The return values of <bVal> are calculated from the INTEGER-Value.
Description of the Output Parameters
| Object/Signal Address | bOk | bVal |
|---|---|---|
| Bin-MP (A) | 1 | true/false |
| Bin-MP (DBX) | 1 | true/false |
| Bin-MP (E) | 1 | true/false |
| Ana-MP (PEW) | 1 | true/false |
| Ana-MP (PAW) | 1 | true/false |
| Ana-MP (DBD) | 1 | true/false |
| Ana-MP (DBW) | 1 | true/false |
| PV (DBX) | 1 | true/false |
| PV (DBB) | 1 | true/false |
| PV (DBW) | 1 | true/false |
| PV (DBD, int) | 1 | true/false |
| PV (DBD, real) | 1 | true/false |
| PV (DBW, string) | 1 | true/false |