Universal Device Driver Reference Manual

1.683 Threshold

The Threshold logical device monitors one parameter like a signal level and generates warnings or faults if given threshold are reached.

Device window pages

The following table shows which device window pages are available with this individual device type. Tool-bar functions not mentioned here are described at the general description of device windows .

--- This page shows the current state of the monitored parameter:
- UNDEF : parameter could not be evaluated
- OK : no threshold reached
- WARNING : warningThreshold reached
- ALARM : alarmThreshold reached.
--- The fault page
--- The device info page.
--- The maintenance page. The configuration parameters described below are set at this page.

Configuration parameters

At the maintenance page of the device window there are a couple of configuration parameters which must be set to interconnect the Level-Set device to the devices it monitors and controls.

parameter --- description
config.inputId --- The parameter ID of the parameter to monitor.
config.warningThreshold --- Warning threshold
config.alarmThreshold --- Alarm threshold
config.thresholdType --- Direction of threshold monitoring
- LOW: alarm/warning if value is below thresholds
- HIGH: alarm/warning if value is above thresholds

Variables defined by this device driver

name	type	flags	range
info.driver	TEXT	R/O	StringRange R/O
info.type	TEXT	R/O	StringRange R/O
info.port	TEXT	R/O	StringRange R/O
info.frame	TEXT	R/O	StringRange R/O
config.inputId	TEXT	SAVE SETUP	StringRange
config.warningThreshold	FLOAT	SAVE SETUP	DoubleRange (0.0000 .. 0.0000)
config.alarmThreshold	FLOAT	SAVE SETUP	DoubleRange (0.0000 .. 0.0000)
config.thresholdType	CHOICE	SAVE SETUP	EnumRange (LOW HIGH)
internal.input	FLOAT		DoubleRange (0.0000 .. 0.0000)
position	CHOICE		EnumRange (UNDEF OK WARNING ALARM)
faults.01	ALARM	R/O	AlarmFlagRange R/O (threshold warning)
faults.02	ALARM	R/O	AlarmFlagRange R/O (threshold alarm)