Alpha Technologies FXM350_Micro350 UPS - Manual (Page 108)

017-241-B0 Rev B 106
Appendix B - Types of Triggers
There are 3 types of trigger:
B.1 Edge trigger
When the user input changes from one state to the other, the Alpha FXM is triggered to perform Action #1. If
the level is set to High, the action will be triggered by a Low to High edge (leading edge). If the level is set to
Low, the action will be triggered by the High to Low edge (falling edge).
Figure 72 — Edge Trigger
B.2 Level Toggle
When the Level is set to High, the Alpha FXM is triggered to perform the other action when the user input
changes from Low to High. If the input then changes from High to Low, Action #2 will be triggered. In other
words, a level change in the user input will trigger an action toggle between Action #1 and #2.
Figure 73 — Level Trigger
Low to High
edge trigger User input
Action #1 Action #1
(a) Level = High
User Input = Low to High, Action #1 is triggered
User Input = High to Low, no action triggered
High to Low
edge trigger
User input
Action #1 Action #1
(b) Level = Low
User Input = High to Low, Action #1 is triggered
User Input = Low to High, no action triggered
Action #1 Action #1
Action #2 Action #2 User input
(a) Level = High
User Input = Low to High, Action #1 is triggered
User Input = High to Low, Action #2 is triggered
Action #2 Action #2
Action #1 Action #1
User input
(b) Level = Low
User Input = High to Low, Action #1 is triggered
User Input = Low to High, Action #2 is triggered