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Field Type DCT Initial Access Modify Rec Proc PP
Monitor
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VAL LONG No 0 Yes Yes Yes Yes
INP INLINK Yes 0 No No N/A No
EGU STRING Yes Null Yes Yes No No
HOPR LONG Yes 0 Yes Yes No No
LOPR LONG Yes 0 Yes Yes No No
HIHI LONG Yes 0 Yes Yes No Yes
LOLO LONG Yes 0 Yes Yes No Yes
HIGH LONG Yes 0 Yes Yes No Yes
LOW LONG Yes 0 Yes Yes No Yes
HHSV GBLCHOICE Yes 0 Yes Yes No Yes
LLSV GBLCHOICE Yes 0 Yes Yes No Yes
HSV GBLCHOICE Yes 0 Yes Yes No Yes
LSV GBLCHOICE Yes 0 Yes Yes No Yes
HYST LONG Yes 0 Yes Yes No No
ADEL LONG Yes 0 Yes Yes No No
MDEL LONG Yes 0 Yes Yes No No
LALM LONG No 0 Yes No No No
ALST LONG No 0 Yes No No No
MLST LONG No 0 Yes No No No
SIOL INLINK Yes 0 No No N/A No
SVAL LONG No 0 Yes Yes No No
SIML INLINK Yes 0 No No N/A No
SIMM GBLCHOICE No 0 Yes Yes No No
SIMS GBLCHOICE Yes 0 Yes Yes No No
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Name Summary Description
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VAL Value Field This is the value resulting form record processing. If INP
is a constant, then VAL is initialized to the INP value but
it can be changed dynamically via dbPutField or
dbPutLink.
INP Input Link This field is used by the device support routines to obtain
input. For soft records, it can be a constant, a database
link, or a channel access link.
EGU Engineering Units ASCII string describing Engineering units. This field is
used by record support to supply a units description string
when get_units is called.
HOPR High Operating These fields determine the upper and lower display limits
Range for graphics displays and the upper and lower control
limits for control displays. The fields are used by record
support to honor calls to get_graphic_double or
get_control_double.
LOPR Low Operating
Range
HIHI Hihi Alarm Limit These fields specify the alarm limits and severities.
HIGH High Alarm Limit
LOW Low Alarm Limit
LOLO Lolo Alarm Limit
HHSV Severity for a Hihi
Alarm
HSV Severity for a High
Alarm
LSV Severity for a Low
Alarm
LLSV Severity for a Lolo
Alarm
HYST Alarm Deadband These parameters specify hysteresis factors for triggering
monitor callbacks, i.e. callbacks specified by calls to
caAddEvent or dbAddEvent. A monitor will not be
triggered until VAL changes by more than the specified
amount.
ADEL Archive Deadband
MDEL Monitor, i.e. value
change, Deadband
LALM Last Alarmed Value when last monitors for alarm/archiver/value
Value changes were triggered. These fields are used to
implement the hysteresis factors for monitor callbacks.
ALST Archive Last Value
MLST Monitor Last Value
SIMM Simulation Mode Simulation mode process variables. Refer to Chapter 3,
Section "Simulation Mode" on page 11 for more
information.
SIML Simulation Mode
Location
SVAL Simulation Value
SIOL Simulation Value
Location
SIMS Simulation Mode
Alarm Severity
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This routine next checks to see that device support is available and a device support read routine is defined. If either does not exist, an error message is issued and processing is terminated.
If device support includes init_record, it is called.
upper_alarm_limit = HIHI upper_warning_limit = HIGH lower_warning_limit = LOW lower_alarm_limit = LOLO
-------------------------------------------------------------------------------------- Name Summary Description -------------------------------------------------------------------------------------- PACT Processing Active See Chapter 2, Section "Database Common: Field Descriptions" on page 4 for descriptions. DPVT Device Private UDF VAL Undefined NSEV New Alarm Severity NSTA New Alarm Status VAL Value Field This field is set by device support routines. INP Input Link This field is used by the device support routines to locate its input. --------------------------------------------------------------------------------------
report(FILE fp, paddr)Not currently used.
init()This routine is called once during IOC initialization.
init_record(precord)This routine is optional. If provided, it is called by the record support init_record routine.
get_ioint_info(int cmd,struct dbCommon *precord,IOSCANPVT *ppvt)This routine is called by the ioEventScan system each time the record is added or deleted from an I/O event scan list. cmd has the value (0,1) if the record is being (added to, deleted from) an I/O event list. It must be provided for any device type that can use the ioEvent scanner.
read_longin(precord)This routine must provide a new input value. It returns the following values:
If the INP link type is constant, then the constant value is stored into VAL by init_record, and UDF is set to FALSE. If the INP link type is PV_LINK, then dbCaAddInlink is called by init_record.
read_longin calls recGblGetLinkValue to read the current value of VAL. See Chapter 3, Section "Soft Input" on page 10 for details.
If the return status of recGblGetLinkValue is zero then read_longin sets UDF to FALSE. read_longin returns the status of recGblGetLinkValue.
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