Ch0x view parameters (HART Output)

The
Ch0x
 view (HART Output) includes these parameters:
Parameter
Description
Output Type
Displays the output type for the channel, which is Current (mA).
Output Range
Sets the output range for the Current (mA) output type.
Available options are:
  • 0 mA to 20 mA
  • 4 mA to 20 mA
Enable HART
Enables HART functionality on the channel.
Channel Offset
To compensate for any error in actuator operation, the device allows an offset to be added to the output channel value sent from the controller. Values are entered in Engineering Units (EU). The default value for the channel offset is 0.0.
Hold for Initialization
Causes the physical output to hold its present state until the value commanded by the controller matches the value at the output screw terminal within 0.1% of full scale. This feature prevents spiking of the output when transitioning into Run mode from Program mode, when recovering from a fault state, or at power up.
Engineering Units
Sets the unit of measurement for
High Engineering
 and
Low Engineering
 and for the channel’s output value.
High Signal
Sets one of the four constants in the scaling equation.
High Signal
 is in terms of the input signal units and corresponds to
High Engineering
 when scaled.
High Signal
 must be greater than
Low Signal
.
High Engineering
Sets one of the four constants in the scaling equation.
High Engineering
 corresponds to
High Signal
 and helps determine the engineering units that the signal values scale into.
Low Signal
Sets one of the four constants in the scaling equation.
Low Signal
 is in terms of the input signal units and corresponds to
Low Engineering
 when scaled.
Low Engineering
Sets one of the four constants in the scaling equation.
Low Engineering
 corresponds to
Low Signal
 and helps determine the engineering units that the signal values scale into.
Output State in Program Mode
Hold Last State
Causes the output to remain at the last value sent from the controller prior to being placed in Program mode.
Output State in Program Mode
User Defined Value
Forces the output to whatever value is entered in the field. The value is entered in the engineering units defined by the scaling parameters for the channel.
When Communication Fails in Program Mode
Specifies the behavior of the outputs if communications fail in Program mode:
  • Leave outputs in Program Mode state
     - Causes the output to behave as defined by the
    Output State in Program Mode
     selection.
  • Change outputs to Fault Mode State
     - Causes the output to behave as defined by the
    Output State in Fault Mode
     selection.
Output State in Fault Mode
Hold Last State
Causes the output to remain at the last value sent from the controller prior to loss of communication.
Output State in Fault Mode
User Defined Value
Forces the output to whatever value is entered in the field. The value is entered in the engineering units defined by the scaling parameters for the channel.
Fault State Duration
Determines the length of time the Fault Value parameter value is held prior to the Final Fault State.
Final Fault State Value
Defines the value, in
Engineering Units
, to which the output goes after the Fault State Duration time expires.
Enable Diagnostics
Enables short circuit and open wire detection on the channel when selected.
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