11... APPENDIX A: MASTER ICON FILE REFERENCE
PERIODIC OUTPUT FUNCTION ICON
FUNCTION:
The Periodic Output Icon generates a Square Wave/Pulse output based upon time values entered by the user in the configuration dialog box. When the icon’s Enable pin goes HI, the output remains LOW for a specified period. The output then goes HI for a user defined period before going back to a LOW state. This cycle is then repeated a specified number of times or continuously. There are two modes of operation that define the icon’s behavior when its Enable pin returns LOW, Reset Upon Disable, and Suspend While Disabled.
Reset Upon Enable: In this mode, whenever the Enable input goes from HI to LOW, the operation is reset. The next time the Enable pin goes HI, the cycle starts from the beginning.
Suspend While Disabled: In this mode, whenever the Enable input goes from HI to LOW, the operation is suspended. All timers are put on hold while the Enable is LOW. The next time the Enable goes HI, operation continues where it left off.
The above net displays a typical application. The Periodic Output Icon is used to cycle a
Another possible application is to insert a time delay into an Event (Logic Type) signal branch.
NOTE: At least one Sample Rate Clock icon is required in every net program. This icon must always be enabled (Enable pin disconnected or ON).
INPUTS:
Enable:Processing of icon is allowed when Enable pin is connected or when connected and Enable signal is TRUE.
OUTPUTS:
Output Signal: Logic Type. The output is TRUE during user defined time windows.
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