This function retrieves the compression specifications for a tag. The compression deviation is provided in engineering units. The minimum and maximum times, compmin and compmax, are returned in seconds. The compression deviation is not used for digital points.

C format

int32 pipt_compspecseng(

int32 pt,

float PIPTR * compdev,

int32 PIPTR * compmin,

int32 PIPTR * compmax );



System error



Point does not exist


pt (passed)

Point number

compdev (returned)

Compression deviation in engineering units

compmin (returned)

Compression minimum time in seconds

compmax (returned)

Compression maximum time in seconds

Usage Notes

Enabling Operational Intelligence