Emerson Control Techniques FM-4 Reference Manual page 116

FM-4 Programming Module Reference Manual
Figure 97: Analog Inputs View
Enable Channel Check Box
By default, the analog input channel is not enabled meaning that the drive is not reading the A/D value read by the analog
circuit. If the check box is clear, the channel is not enabled and the configuration parameters for the analog input are
unavailable and therefore have no effect.
To enable the analog input, simply select the Enable Channel check box, and the configuration parameters will become
available to edit. With the channel enabled, the trajectory loop update will transfer data from the drive into
DriveAnalogInput.RawValue as volts and into DriveAnalogInput.ValueIn scaled. If Enable Module Destination check box
is selected (DriveAnalogInput.ModuleDestinationEnable is set) it will also load the selected module destination variable with
scaled data.
Enable Module Destination Check Box
If the check box is selected (enabled), the user units and decimal places are then defined by the module variable selected. The
selected variable will be updated every trajectory loop update along with DriveAnalogInput.RawInput and
DriveAnalogInput.ValueIn.
If disabled (check box is clear), the user units and decimal places are defined by the values entered into User Units and
Decimal Places text boxes on the Analog Input view. The Driv eAnalogInput.RawValue and DriveAnalogInput.ValueIn will
be updated every trajectory update.
User Units
This parameter allows the user to enter a 12 character string to be used as units for the analog input parameter.
Decimal
This parameter defines how many digits (up to six) are used after the decimal place for the user unit scaled analog input
parameter. This defines the maximum resolution of the analog input parameter.
Module Variable
When Enable Module Destination check box is selected, PowerTools Pro displays this text box that the user can enter any
module parameter using the program format for that variable.
When the Popup Variables... button is pressed, the Select FM Variables window will open containing a list of variables that
can be dragged and dropped into the Module Variable text box.
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