Instruction Manual
Instruction Manual
D103557X012
Configuration
January 2015
33
configured as a transmitter, the output can be configured to drive high (22.5 mA) or low (3.6 mA). When
configured as a switch, the output can be configured to drive Closed or Open.
Note
On loss of positioner power, the switch circuit will always go to the open state. However, on loss of positioner power, the
transmitter output will continue to operate as long as the transmitter circuit is still powered and functioning.
Switch Configuration
D Limit Switch Trip Point—When the function is configured as a Limit Switch, this defines the threshold for the limit
switch in percent of calibrated travel.
D Alert Switch Source—When the function is configured as a Alert Switch, this determines which alert will activate the
switch. The alert choices are: Travel Deviation, Valve Stuck, LCP Tripped, SIS Diagnostic Credit, or Diagnostic in
Progress.
D Switch Closed—This configures the action of the switch. The choices are: Below Trip Point / Alert Not Active or
Above Trip Point / Alert Active.
HART Variable Assignments
Instrument variables can be reported via four different HART variable assignments. The Primary Variable is always
configured as Analog Input. However, the remaining three variables have additional options as listed below.
Primary Variable (PV) Analog Input
Secondary Variable (SV) Travel, Travel Setpoint, Pressure A, Pressure B, Pressure AB, Supply Pressure,
Drive Signal, or Analog Input
Tertiary Variable (TV) Travel, Travel Setpoint, Pressure A, Pressure B, Pressure AB, Supply Pressure,
Drive Signal, or Analog Input
Quaternary Variable (QV) Travel, Travel Setpoint, Pressure A, Pressure B, Pressure AB, Supply Pressure,
Drive Signal, or Analog Input
Transmitter Output
This configures the relationship between the valve travel and the position transmitter output signal. There are two
choices; 4mA = Valve Closed or 4mA = Valve Open.
Burst Mode
Burst mode provides continuous communication from the digital valve controller. Burst mode applies only to the
transmission of burst mode data (HART Variable Assignments) and does not affect the way other data is accessed.
Burst mode is only available in devices configured as HART Universal Revision 5.
D Burst Enable—This turns on or off the burst mode.