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FM-4 Programming Module Reference Manual
Figure 98:
Analog Outputs View
Enable Channel Check Box
By default, the analog output channels are not enabled meaning that a value is not being sent to the analog circuit. When the
channel is disabled (check box is clear), the configuration parameters for that analog output are unavailable and therefore
have no effect. To enable the output, simply select the Enable Channel check box, and the configuration parameters will
become available to edit.
If the user wishes to control the Analog Output through other means, it is necessary to clear the Enable Channel check box.
Source
Allows the user to create a direct connection from a Source parameter to the Analog Output. The current value of the
parameter selected as the Source will directly determine the value of the Analog Output signal. The Source list box contains
a list of predefined parameters to select from.
FM Var
The Module Variable parameter is only available once the user has selected Custom Variable from the Source list box above.
This text box is used to define what parameter will control the Analog Output. The selected module parameter will directly
determine the value of the analog output based on the Max and Min scaling values entered on this view. The parameter is
entered here in program format or see Popup Variables Button, below.
Popup Variables Button
Click this button to open the Select FM Variables window. Select the variable and then drag the variable over to the FM Var
text box to assign the variable to the Analog output channel.
Maximum Value
The analog output is a linear interpolation of the selected module variable between the minimum and maximum specified end
points. Each end point is specified as the user value and the corresponding output value at that point. The number of decimal
places for both values is taken from the selected module variable. MaxUserValue is the maximum user unit value which
corresponds to the maximum analog output value.
Maximum Output
The analog output is a linear interpolation of the selected module variable between the minimum and maximum specified end
points. Each end point is specified as the user value and the corresponding output value at that point. The number of decimal
places for both values is taken from the selected module variable. MaxOutputValue is the maximum analog output value
which corresponds to the maximum user value.
104
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