Point staling based on data quality from field device

Protocol drivers set the isQuestionable flag in the hash_datum data structure before calling the krunch_data API. This applies to all protocol drivers that support field-driven questionable data quality.

/* Data structure for cacheing of all IOspec'ed items */

typedef struct hash_datum {

struct hash_datum *next; /* ptr to next item in list */

int rtu; /* Rtu slot number */

int dbnum; /* Database number */

int ptnum; /* Point number in database */

pntIOSpec iospec; /* Iospec for this point */

analogtype anatype;/* Analog input type */

rateintype intype; /* Rate input type (if rate) */

rateintype ratetype; /* Rate type (if RTYP_BOTH) */

unsigned char bitnum; /* Bit number in CMX status pnt */

unsigned char bitno; /* Bit # in rtu data word */

oas_boolean_t inremstat; /* is bit in RTU status word */

unsigned char bitwidth; /* # bits ( >0 if status bit) */

unsigned char straptype; /* strap type (used by tank) */

int usr1; /* for use by protocol r/w */

unsigned char usr2[16];/*for use by protocol r/w */

unsigned char usr3; /* for use by protocol r/w */

pntname usr4; // for application usage

internaltime lastKrunchTime; /* Time of last krunch*/

oas_boolean_t isQuestionable; //centerpoint bsap (BSAPFLG)

} hash_datum;

Sample Open Platform Communications (OPC) Protocol Driver for OASyS Code

if ((qualityFlag & OPC_QUALITY_MASK) == OPC_QUALITY_GOOD)

{

phdatum->isQuestionable = OAS_FALSE;

}

else

{

phdatum->isQuestionable = OAS_TRUE;

}