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| 1/29/2008 11:25 PM | |
Joined: 1/5/2007 Last visit: 4/7/2023 Posts: 1690 Rating:
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Hello clodoaldo, please look at my answers and follow the links (to the german part of this forum with LOGO! program examples) at DC timer using LOGO! I think this can help you. If you have questions or problems,please ask me here again. Additional Infos: Normaly the PC-simulation has problems to work (count) right with small time parameters (of the pulsgenerator...) but the LOGO! works OK !! But if the cyclic frequency is to low for the defined time parameters from you (if the program is very complex or/and you use one or more expand modules this can be), then some pulses canget lost and you see a too small time result (= counts). An other problem can be, that you measure only small time parts with a high number of starts and stops. In this case it can be possible that you counta wrong(to high or to low) number of counds! This can solve (or be better), if you invert the pin "INV" of the pulsgenerator AND set the time parameters for the puls and the pause to the same value. In this case you make a puls for the counter in the middle of the time base and so you get a smaller time error if the stop-time is different from this time-point of your time base. Best regards Betel |
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