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How do I make the math instruction and analog comparator block count up to the value 999999999

Created by: duma_calin145 at: 7/31/2025 10:55 AM (24 Replies)

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7/31/2025 1:11 PM	Rate (0)
ixo65 Grandmaster Joined: 12/18/2014 Last visit: 9/10/2025 Posts: 35946 Rating: (4500)	It looks like you didn't understand my post. You can't compare values greater than 32,768 with just one analog comparator.

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7/31/2025 1:13 PM	Rate (0)
duma_calin145 Joined: 7/24/2025 Last visit: 8/17/2025 Posts: 26 Rating: (0)	This is my project and on the lost line I want to display the average between the Mathematical calculation between INPUT - OUTPUT = LOST. At the moment if INPUT or OUTPUT has a value greater than 32K LOST becomes 0 Attachment Circuit Diagram1.zip (39 Downloads)
	Last edited by: Moderator_Lan at: 07/31/2025 13:17:57 Text formatting optimized
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7/31/2025 1:17 PM	Rate (0)
duma_calin145 Joined: 7/24/2025 Last visit: 8/17/2025 Posts: 26 Rating: (0)	Is there any logic that can help me compare values greater than 32,768?

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7/31/2025 1:20 PM	Rate (0)
ixo65 Grandmaster Joined: 12/18/2014 Last visit: 9/10/2025 Posts: 35946 Rating: (4500)	That's what I wrote. You reference the counter value to the math instruction. If the counter value is greater than 32,767, it is limited to 32,767 in the math instruction. Was that clear now?

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7/31/2025 1:25 PM	Rate (0)
duma_calin145 Joined: 7/24/2025 Last visit: 8/17/2025 Posts: 26 Rating: (0)	Now it's clearer, thanks for the support.

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7/31/2025 1:26 PM	Rate (0)
ixo65 Grandmaster Joined: 12/18/2014 Last visit: 9/10/2025 Posts: 35946 Rating: (4500)	duma_calin145 Is there any logic that can help me compare values greater than 32,768? LOGO! doesn't have any bus blocks for this by default, because LOGO! is designed only for integers. Years ago, I created my own UDF to compare positive double integer values. I've created a sample program for you that allows you to compare counter values up to 999,999,999,999. Attachment Compare_values_max_999,999,999,999_0BA8.Standard.zip (46 Downloads)

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7/31/2025 1:33 PM	Rate (0)
duma_calin145 Joined: 7/24/2025 Last visit: 8/17/2025 Posts: 26 Rating: (0)	Thank you, but the program does not do the calculation I need, for example I1 - I2 = LOST (As I put in the program I created above)

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7/31/2025 1:41 PM	Rate (0)
ixo65 Grandmaster Joined: 12/18/2014 Last visit: 9/10/2025 Posts: 35946 Rating: (4500)	duma_calin145 Thank you, but the program does not do the calculation I need, for example I1 - I2 = LOST (As I put in the program I created above) And why do you mean this?

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7/31/2025 1:58 PM	Rate (0)
duma_calin145 Joined: 7/24/2025 Last visit: 8/17/2025 Posts: 26 Rating: (0)	The above program that you presented, has counters has everything it needs. I need a program that can do a simple addition calculation. Simple subtraction calculation. INPUT which is S1 Output which is S2 and from I1 and I2 I want to find out their result> The above program that you uploaded does not show this

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7/31/2025 1:58 PM	Rate (0)
ixo65 Grandmaster Joined: 12/18/2014 Last visit: 9/10/2025 Posts: 35946 Rating: (4500)	Ah, now I understand what you mean. You want to display a difference value. That's not possible with LOGO! for values greater than 32,767.

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