11.. . APPENDIX A: MASTER ICON REFERENCE

START/STOP CLOCK FUNCTION ICON

The Start/Stop Clock icon generates a Logic output that is a function of a User defined time. Two different modes of operation are available, Absolute Start/Stop and Delayed Start/Stop.

Absolute Start/Stop Mode: In this mode, the icon output is True for a User defined window of time. The User can specify the Start and Stop dates and times.

Delayed Start/Stop Mode: The icon output goes True at a User specified elapsed time after the OMP-MODL is Enabled, then stays True for a User specified length of time before returning False.

NOTE: In both modes, after the Start/Stop clock `stops’, the OMP-MODL will continue to be Enabled. However, any icons in the Net that are controlled by the Start/Stop icon will not update. Alarms will remain in the state they are in when the Stop occurs.

A typical application of this icon is to enable an unattended OMP-MODL at some particular future time, then disable after a period of time. The following Net illustrates that application:

INPUTS:

Enable:Processing of icon is allowed when Enable pin is unconnected or when connected and Enable signal is TRUE.

OUTPUTS:

Output Signal: Logic type. The Output is True during User defined time windows.

USING THE OMP-MODL

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Omega Vehicle Security OMP-MODL manual START/STOP Clock Function Icon, 11-87