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Siemens Logo Analog Reverse Calculaton

Created by: Marsus at: 10/2/2014 8:32 AM (7 Replies)

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10/2/2014 8:32 AM	Rate (0)
Marsus Posts: 53 Rating: (1)	Dear siemens logo PLC Expert. I need a program for my logo OBA4 That will give output like this: For analog Input------------Analog Output 0--------------------------10 1----------------------------9 2----------------------------8 3-----------------------------7 4----------------------------6 5----------------------------5 6-----------------------------4 7----------------------------3 8----------------------------2 9-----------------------------1 10-----------------------------0 That means analog output should be reversely proportional of analog input. If inupt increase output decrease and vice versa. How can I make this programm in Siemens Logo PLC?
Marsus Posts: 53 Rating: (1)
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10/2/2014 9:07 AM	Rate (0)
Toeternietoe Platinum Member Joined: 12/27/2006 Last visit: 11/17/2025 Posts: 1200 Rating: (116)	I have try to make it, but You need a newer version of your LOGO! Use an OBA6 and it wil be easy to make it. Attachment Analog_Minus.zip (491 Downloads)

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10/2/2014 9:36 AM	Rate (0)
Marsus Posts: 53 Rating: (1)	Toeternietoe I have try to make it, but You need a newer version of your LOGO! Use an OBA6 and it wil be easy to make it. Thanks a lot for your effort. But I don't have OBA6. I have OBA4. I don't know whether it is possible or not?
Marsus Posts: 53 Rating: (1)
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This contribution was helpful to 1 thankful Users Betel

10/4/2014 9:52 PM	Rate (0)
190B Posts: 2347 Rating: (385)	What are you going to do is not possible with the 0BA4. You have to at least take a 0BA5, or higher. As it can be realized with a 0BA5, see Appendix. Attachment Analog reverse.jpg (615 Downloads)
190B Posts: 2347 Rating: (385)
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10/13/2014 11:36 AM	Rate (0)
Betel Posts: 1690 Rating: (584)	Hello Marsus, all given answers before are false (and can delete)! A calculation of the given data-table with a LOGO-0ba4 is possible and easy. You need only one function-block "amplifier" with GAIN = -1,00 und Offset = 10. Best regards Betel
Betel Posts: 1690 Rating: (584)
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10/13/2014 12:11 PM	Rate (0)
190B Posts: 2347 Rating: (385)	Hello betel, Beautiful, once again "see" you. I once tried to enter a minus sign in gain. That will not be accepted. Can you ever post an example?
190B Posts: 2347 Rating: (385)
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This contribution was helpful to 1 thankful Users Betel

10/13/2014 12:18 PM	Rate (0)
190B Posts: 2347 Rating: (385)	Hello betel, the minus sign is only accepted for the 0BA5 or higher. Try it by self.
190B Posts: 2347 Rating: (385)
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This contribution was helpful to 1 thankful Users Betel

10/13/2014 12:48 PM	Rate (0)
Betel Posts: 1690 Rating: (584)	OHHH, ohhhh... prog would be set by 0ba5, sorry! OK, a meaasge with the input and output values is possible; an analoge output not... Attachment Schaltplan1 (oba4).zip (395 Downloads)
Betel Posts: 1690 Rating: (584)	Last edited by: Betel at: 10/13/2014 1:11 PM Attachment..
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