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Difference between time counters

Created by: a.piquerel35 at: 7/9/2020 11:45 PM (4 Replies)

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7/9/2020 11:45 PM	Rate (0)
a.piquerel35 Regular Member Joined: 6/20/2020 Last visit: 10/22/2024 Posts: 44 Rating: (0)	Hello, Please, can you ask me why, when the second counter is not equal to 10 times the value of the first ? The first totals the pulses every second, and the second totals the pulses every 1/10 of a second Where is my mistake please ? Thanks Attachment Counters 1 vs 10.JPG (177 Downloads)

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7/10/2020 4:59 AM	Rate (0)
ixo65 Grandmaster-Expert Joined: 12/18/2014 Last visit: 11/2/2024 Posts: 34125 Rating: (4249)	You test it only in simulation mode, not in a real LOGO!. Simulation is not the real life. And note: Is the Asynchronous Pulse Generator not inverted, starts he with a high output. Then have both counters after the first cycle the value 1. One second later has the 1s counter the value 2, the 1/10s counter 11. Two seconds later has the 1s counter the value 3, the 1/10s counter 21. Three seconds later has the 1s counter the value 4, the 1/10s counter 31. And so on ... Attachment Untitled.png (157 Downloads)

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7/10/2020 11:27 PM	Rate (0)
a.piquerel35 Regular Member Joined: 6/20/2020 Last visit: 10/22/2024 Posts: 44 Rating: (0)	Thanks ixo65,your answer helped me a lot, but i'm having the opposite problem now. The simulation works well but not the reality. in reality, the 1 / 10s counter increments to 32767 in a very short time. Here is my program in attached file. Pressing I3 starts the two counters. The counter 1s totals in liters. (never reset) The 1 / 10s counter totals the 5 sec cycle. It is reset on the next cycle. Thank you for your help. Attachment Volume Cycle-Total.zip (220 Downloads)

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7/11/2020 5:56 AM	Rate (0)
ixo65 Grandmaster-Expert Joined: 12/18/2014 Last visit: 11/2/2024 Posts: 34125 Rating: (4249)	As I wrote in my post before: Simulation is simulation and not the real LOGO !. If the asynchronous pulse generator (B012) switches to high signal, the output is high for 0.01s. During this time, the program runs through several cycles. The sum is added in each cycle. However, if the asynchronous pulse generator (B012) switches to high signal, it should only be added once. You can solve this by adding a positive edge between the output of the asynchronous pulse generator (B012) and the OR block (B016).
	Last edited by: ixo65 at: 07/11/2020 05:58:31
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7/11/2020 3:41 PM	Rate (0)
a.piquerel35 Regular Member Joined: 6/20/2020 Last visit: 10/22/2024 Posts: 44 Rating: (0)	Thanks ixo65, the positive edge solved my problem of excessive counting problem. [snip]
	Last edited by: Jen_Moderator at: 07/13/2020 07:37:17 Division of questions into separate topics.
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