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11.. . APPENDIX A: MASTER ICON REFERENCE
USING THE OMP-MODL 11-19
EVENT INPUT ICON (GPDI)
FUNCTION:
The GPDI (General Purpose Digital Input) is a hardware digital input for Event and
Counter applications. It is incorporated into every OMP-MODL System Base.
As an EVENT input, it samples the input signal state (High or Low) per the sampling rate
set on the Update input. It updates its output only when the input changes state.
INPUTS:
Hardware: No signal input shown on Net for Program Net connections.
Update: The input is sampled every time an Update command is received on the
Update input. If the input state has changed since the last Update
command was received, the Output is updated with the new state. The
absolute time resolution of the state change is determined by the frequency
of the Update signal. For example, if an Update command is received
every second, the state change will be recorded with one second
resolution.
Enable: Processing of the icon is allowed when Enable pin is unconnected or
connected and the Enable signal is TRUE.
OUTPUTS:
Output Signal: Logic type signal
ICON CONFIGURATION DIALOG BOX:
CONFIGURATION OPTIONS:
Icon Name: Specify the name for the channel. This name will show directly under the
icon within the Program Net. If no name is User provided, the Backplane
Port (1 to 6) and Channel (A to D) where the actual Interface Module
channel is installed will be used for the name.
Output Name: Specify a name for the Output signal from this icon. This Output
Name will be referenced by other icons downstream in the Program Net.
Event / Counter Select EVENT for the Event function.
Debounce: Enables a hardware filter circuit that prevents short duration transitions
from passing into the icon. Debounce can be used to filter out contact
bounce from mechanical switches. The GPDI Debounce has a time