#26 Problems with S7-1500

[HallerbachJ]

Hi,

first, I want to thank you for this great library!

We are using this library in the field of plant automation with various kinds of Siemens PLC's (300, 400, 1200 and 1500).

There is absolutely no problem with the 300 and 400 series, but the 1500 sometimes causes big problems. We are using the library for reading and writing process data in different DB's (eg. DB100 for Digital Inputs, DB200 for Digital Outputs and so on). Most of the time, the data exchange works flawlessly, but maybe once in a month there is a fatal error, which totally messes up the content of the DB's.

This seems to be the same problem, which is described here:

https://sourceforge.net/p/snap7/discussion/bugfix/thread/927e97c11c/#381d

I have not tested the workaround there, but maybe other users have had the same problems? I think, this is related with short network interruption, but I have not managed to trap this error in a way, that no silly data is read / written.

Best regards