StreamDevice: bo Records

Normal Operation

Depending on the format type, different record fields are used for output and input. The variable x stands for the written or read value.

DOUBLE format (e.g. %f):

Not allowed.

LONG format (e.g. %i):

Output: x=RVAL
Input: RBV=x&MASK
MASK can be set be set in the record definition. Stream Device does not set it. If MASK==0, it is ignored (i.e. RBV=x).

ENUM format (e.g. %{):

Output: x=VAL
Input: VAL=(x!=0)

STRING format (e.g. %s):

Output: Depending on VAL, ZNAM or ONAM is written, i.e. x=VAL?ONAM:ZNAM.
Input: If input is equal to ZNAM or ONAM, VAL is set accordingly. Other input strings are not accepted.

Initialization

During initialization, the @init handler is executed, if present. In contrast to normal operation, LONG input is put to RVAL as well as to RBV and converted by the record.

aai aao ai ao bi mbbi mbbo mbbiDirect mbboDirect longin longout stringin stringout waveform calcout scalcout

Dirk Zimoch, 2005