Omega Vehicle Security OMP-MODL manual 11-26

11... APPENDIX A: MASTER ICON FILE REFERENCE

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.

Units: Provides a text box for User entry of a units label that will be shown at the output from this icon. Conversion to other units can be performed within a Program Net by adding a Math Icon onto this icon’s output.

Event / Counter / Frequency Select COUNTER for the Counter 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 MLIM-2 Debounce has a time constant of approximately 50mS. Note that the use of Debounce will delay the actual input to output transition time by 50 to 200 mS.

FYI: Contact bounce is a phenomenon that occurs when a mechanical switch opens or closes. During switching, the physical electrical contacts inside the switch bounce against each other a number of times before they settle to their final state.

Depending on the duty cycle of the contact bounce, the OMP-MODL may count these bounces as events or transitions (count mode) resulting in technically accurate but undesired data. By enabling the debounce function, typical short duration contact bounce will be filtered out.

Count Rising / Falling edges: Specify which edge of the input signal is to be used to increment the counter (eg when a device being monitored turns ON or OFF).

11-26 USING THE OMP-MODL