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Connection lost after download

Created by: Sentience at: 5/22/2020 8:58 AM (9 Replies)

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5/22/2020 8:58 AM	Rate (0)
Sentience Regular Member Joined: 4/11/2018 Last visit: 7/6/2022 Posts: 12 Rating: (0)	Hi, I've some strange behavior with downloads from TIA 14 SP1 to a CPU 1517F-3 running on FWV 2.5.0. In 25% of the downloads I do, I need to reboot the CPU because I can no longer make an online connection in TIA and also the HMI is disconnected from the CPU. Only solution I found so far is rebooting the CPU. However when I come back online, I see that my download was successful and all blocks are loaded online. In the general info tab of TIA I read "0x8200A6000332FFFC not enough memory available" and "Too many online connections. Please terminate some connections and try again.". I doubt that I either have problems with memory or the number of connections. All memory (Load, code, work and Retain) are more than 50% free. In the diagnostic buffer is nothing to find related to this issue. I'm planning to upgrade the firmware to V2.8.x for other reasons, but I'd rather know first if this connection issue is related to firmware or to something else. Any hint or own experience is more than welcome! Attachment Info.png (221 Downloads)

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5/22/2020 11:26 AM	Rate (0)
0_Einstein Diamond Member Joined: 7/7/2010 Last visit: 9/29/2023 Posts: 13751 Rating: (2243)	I think it may be your PC that doesn’t have enough memory. ...sent from App
	science guy
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5/22/2020 11:36 AM	Rate (0)
Sentience Regular Member Joined: 4/11/2018 Last visit: 7/6/2022 Posts: 12 Rating: (0)	I can make sure in the future that I only have 1 instance of TIA running at the moment of download, but actually my laptop with 64GB installed physical memory should be sufficient. For example at the moment of writing I've 3 instances open and run currently with a memory usage of 30%.

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5/25/2020 4:03 PM	Rate (0)
Sentience Regular Member Joined: 4/11/2018 Last visit: 7/6/2022 Posts: 12 Rating: (0)	Today it occurred again with only one instance of TIA running. So we're dealing with something else I guess.

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5/26/2020 2:19 PM	Rate (0)
0_Einstein Diamond Member Joined: 7/7/2010 Last visit: 9/29/2023 Posts: 13751 Rating: (2243)	How many profinet devices are connected to the PLC all the time? Are you using multi-engineering connections to the PLC? Sentience Today it occurred again with only one instance of TIA running. So we're dealing with something else I guess.
	science guy
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5/27/2020 6:38 AM	Rate (0)
Sentience Regular Member Joined: 4/11/2018 Last visit: 7/6/2022 Posts: 12 Rating: (0)	0_Einstein How many profinet devices are connected to the PLC all the time? Are you using multi-engineering connections to the PLC? The PLC has currently 56 Profinet devices in it's own network, but also shares his subnet with more than 250 devices. But all the other CPU's in the same subnet from the same type (1517) never have this issue. I took a print screen of the online connections. Multi-user was used in the beginning of the project, now there is only one engineer online at the time. Attachment Info.png (213 Downloads)

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5/27/2020 2:42 PM	Rate (0)
0_Einstein Diamond Member Joined: 7/7/2010 Last visit: 9/29/2023 Posts: 13751 Rating: (2243)	When the www / web server is used, is it logged in / out every time? Or, do the users do like most people and skip the logout? If so, once the online connections exceed the available web server connections, it stops accepting new connections. Is 56 PN devices typical of all the other PLCs in the same subnet? The S7-1517 PLC is quite powerful as you already know. Is the firmware the same on all the S7-1517's? What version of TIA Portal is used on most of those PLCs? Sentience 0_Einstein How many profinet devices are connected to the PLC all the time? Are you using multi-engineering connections to the PLC? The PLC has currently 56 Profinet devices in it's own network, but also shares his subnet with more than 250 devices. But all the other CPU's in the same subnet from the same type (1517) never have this issue. I took a print screen of the online connections. Multi-user was used in the beginning of the project, now there is only one engineer online at the time.
	science guy
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5/27/2020 3:06 PM	Rate (0)
Sentience Regular Member Joined: 4/11/2018 Last visit: 7/6/2022 Posts: 12 Rating: (0)	0_Einstein When the www / web server is used, is it logged in / out every time? Or, do the users do like most people and skip the logout? If so, once the online connections exceed the available web server connections, it stops accepting new connections. I've enabled all useful functions in the web server without a required user level in order to avoid this. On this CPU there are no user-pages running, it's only visited for debugging purposes. That's also the reason why it showed one web connection in my post above since I was visiting the webpage for this at that moment. 0_Einstein Is 56 PN devices typical of all the other PLCs in the same subnet? A lot of them are similar, like for instance servo drives. But some of them are also very unique per machine like lasers, robots, webcams, vision, etc. But this is the CPU with the most Profinet devices for sure. Note that this network is not segmented and runs far from efficient but this was a desiccation I didn't make and cannot change anymore. Maybe also good to mention that all CPU's run OPC UA servers as well with an update rate of 1s. Therefore I've configured the communication load at 50% on all of them to make it all as smooth as possible. 0_Einstein The S7-1517 PLC is quite powerful as you already know. Is the firmware the same on all the S7-1517's? What version of TIA Portal is used on most of those PLCs? No, and that's why it would make a lot of sense to me if we can find a correlation between the FW version in this CPU and these download errors. This CPU is running with FW2.5.0 and the others run either on FW2.6.0 or FW2.6.1. Because we currently have so many different versions and because we already found proof for another issue on another CPU that we could relate to the FW, we will soon upgrade them all to FW2.8.2. 0_Einstein What version of TIA Portal is used on most of those PLCs? They are all programmed using TIA V14 SP1 update 9.

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5/27/2020 3:25 PM

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0_Einstein

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You may find this firmware description for FW 2.5.2 worth a few moments of thought:

https://support.industry.siemens.com/cs/document/109478459
Update V2.5.2 CPUs and V2.5.1/V2.5.2 Displays
...
Enhancement of the user experience
The following behavior was improved:
When the system resources available for OPC UA are exceeded, the sporadic behavior no longer occurs that no online connection can be established to the controller from the TIA Portal.

science guy

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6/19/2020 10:44 AM	Rate (0)
Sentience Regular Member Joined: 4/11/2018 Last visit: 7/6/2022 Posts: 12 Rating: (0)	By now I can confirm my issues were caused by the firmware. We run now with firmware v2.8.2 for the last two weeks, and no connection losses occurred anymore!

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This contribution was helpful to 1 thankful Users 0_Einstein

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Created by: Sentience at: 5/22/2020 8:58 AM (9 Replies)

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