11.. . APPENDIX A: MASTER ICON REFERENCE

RATE OF CHANGE FUNCTION ICON

FUNCTION:

The Rate of Change icon calculates and outputs the rate of change of a signal for a user specified number of samples. A “sliding” calculation is performed each time the input is updated. For example, if the user-entered number of samples is 5, after the 5th sample is taken, the 1st and 5th samples are used for the calculation. The next time sample is taken, the 2nd and 6th are used and so on.

INPUTS:

Data/Logic Signal:

Data type.

OUTPUTS:

Output Signal: Data type. The Rate of Change icon updates its output after receiving the user specified number of samples and calculation the Rate of Chnge.

ICON CONFIGURATION DIALOG BOX:

CONFIGURATION OPTIONS:

Icon Name: Specify the label for the icon. This name will show directly under the icon within the Program Net.

Input Rate Time Base: Specifies ttime base of the output. For example if Seconds is selected and the input is temperature, the output would be the rate of change of the input in degrees per second.

Number of Samples: Specifies the number of samples that defines the time interval used for the calculation.(dtm samples/intervals???).

Output Name:Specify the label for the Output. This name will show directly under the Output terminal within the Program Net.

Units: Provides a text box for user entry of a units label that will be shown at the output from this icon

USING THE OMP-MODL

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Omega Vehicle Security OMP-MODL manual Rate of Change Function Icon, 11-107