Honeywell function blocks
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How to use the FTRIGA and RTRIGA function blocks?
Reply to 1# jerry512158: Rising and falling logic blocks
Agree with what was said on floor 2: the trigger module ftrig changes from 1 to 0 during an upward edge, while the rtrig acts in exactly the opposite way
Reply to 4# mingyao1987: What is the difference between ONDELAYA and OFFDELAYA?
Reply to 5# jerry512158: Delay refers to a timing delay. For example, when a switch button goes from the closed position to the open position, it would normally do so instantly; but with a delay applied, it will open after the time you specify. If the switch returns to the closed position during that delay period, the output of the delay function remains unchanged. ftirg (falling trigger) and rtrig (rising trigger) refer to transitions. If a contact changes from closed to open, then ftrig will activate and output 1; if a contact changes from open to closed, then rtrig will activate and output 1
Reply to 6# mingyao1987: Yes, it’s mainly to prevent interference from burr signals, that’s why a delay is added. Honeywell also offers dedicated options for removing signal noise; it’s not clear whether these are used before signal processing or only for displaying historical trends. I hope an expert can answer this.
Reply 6# mingyao1987: Is it a brief pulse?
Reply to 8# jerry512158: Yes, it’s triggered by a pulse.
Reply to 8# jerry512158: It needs to be used together with the pulse block to facilitate setting the pulse duration