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Network input automaticly turns high

Created by: F.v.Lieshout at: 7/13/2021 6:02 PM (6 Replies)

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7/13/2021 6:02 PM	Rate (0)
F.v.Lieshout Posts: 4 Rating: (0)	Hi everybody, I have a network project with 4 logo's 8.3 and a KTP700 in it. As i am new working with the HMI to the logo i think i have address failures in the program. When in online mode several NI's switch low to high and back whitout switching on the screen, it looks like they react to analog input values which are used in the program. I guess some of the addresses are the same... so my question: Is there a guideline how to setup addresses, maybe a good way of using a structural way to setup? I use digital inputs, digital outputs, flags, network inputs, network outputs and VM mapping for reading and adjusting paramers. For instance, will the same byte number on a different logo (different IP addresses) give an issue, as i am thinking the HMI sees the logo's seperate as they have each their own address. I have found on the forum some lists (Logo 0BA8) which show a typical address for each of the VM addresses, is it better to use those instead of giving them an address myself..? Tips regarding these network setups are very welcome! Many thanks!
F.v.Lieshout Posts: 4 Rating: (0)
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7/13/2021 6:16 PM	Rate (0)
ixo65 Grandmaster Joined: 12/18/2014 Last visit: 1/19/2026 Posts: 36482 Rating: (4552)	Since I don't know your LOGO! programs and your HMI project, I can only guess. And I suspect an overlap in the VM storage area. The memory addressing in the VM memory is byte-oriented. The following applies to bits: Byte address. Bit address. V0.0 = Byte0.Bit0 The following applies to bytes: A byte is made up of 8 consecutive bits. Byte address. e.g. VB0. VB0 are also the bits V0.0 - V0.7. The following applies to Words: A word is made up of two consecutive bytes. The left byte is given as the start address. VW0 = VB0 and VB1 = V0.0 - V1.7. The following applies to DWords: A DWord consists of four consecutive bytes. The left byte is given as the start address. VD0 = VW0 and VW2 = VB0 - VB3 = V0.0 - V3.7. Attachment LOGO! Bit, Byte, Word and DWord.pdf (339 Downloads)

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7/13/2021 8:49 PM	Rate (0)
F.v.Lieshout Posts: 4 Rating: (0)	Hi ixo65, Thanks for you reply! I did found your scheme on the forum, it makes it totally clear and already worked with it! Can i use V0.0 with logo 1 having ip 192.168.1.10 and using V0.0 again on logo 2 with ip 192.168.1.20 ? So will the HMI have a conflict or is the separation within the ip enough? To avoid conflicts i have reorganised the hole VM list of all NI and VM parameters, tomorrow i will check if it now is without spontaneously acting NI's...
F.v.Lieshout Posts: 4 Rating: (0)
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7/13/2021 8:59 PM	Rate (0)
ixo65 Grandmaster Joined: 12/18/2014 Last visit: 1/19/2026 Posts: 36482 Rating: (4552)	Every LOGO! has its own storage area. You can transfer V0.0 from LOGO! to the HMI without problems if LOGO!1 has its own connection. Thanks to its own connection, the HMI knows which LOGO! the bit V0.0 is sent.

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This contribution was helpful to 1 thankful Users F.v.Lieshout

7/13/2021 9:09 PM	Rate (0)
F.v.Lieshout Posts: 4 Rating: (0)	Ok, clear! I think i have found my mistake. I began with addressing the NI's and then did the VM mapping. Logosoft automatically starts with VW0 and in that range were also my addresses from the NI's. Tomorrow i will be able to test and get a proof of have done it wrong. Until then thanks for the help!!
F.v.Lieshout Posts: 4 Rating: (0)
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7/13/2021 9:13 PM	Rate (0)
ixo65 Grandmaster Joined: 12/18/2014 Last visit: 1/19/2026 Posts: 36482 Rating: (4552)	That is the problem. If you use V0.0 - V1.7 for digital bits, then can you not use VW0 for other things. That's overlapping ...

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7/15/2021 12:31 AM	Rate (0)
F.v.Lieshout Posts: 4 Rating: (0)	Thanks again IXO65 ! Today loaded the software and worked without any problem or spontaneous switching...
F.v.Lieshout Posts: 4 Rating: (0)
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This contribution was helpful to 1 thankful Users ixo65

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