Hello,

  I have a problem with GPRS communication between two PLCs. The first PLC is a S7-300 with a Linksys GPRS router and the second is a S7-1200 with CP 1242-7 in GPRS direct mode. The S7-300 PLC is reading some data ( 2 variables DInt and 2 variables Bool) with the "GET" SFB. The problem is that from time to time the communication between the devices stops and it cannot start again (only when they stop the power supply and turn it back on it starts). There is an event in the diagnostic buffer (in the attached pic) that is connected with the problem but I cannot find any information about it :( .The signal strength is very good. Have anyone had a similar problem?

Thank you!

Hello S.Veselinov

Which TIA Portal Version do you use exactly (Servicepack and Update)?

Are both PLC in the same TIA Portal Project?

Bye Murof

Hi Murof,

I use TIA Portal V13 SP1 Update 6. The PLCs are not in the same project.

Thanks.

Hi All,

I am also facing the same problem but with one PLC.

Error screenshot attached for reference.

Any help is urgently required.

Thank you

Hi Siemens forum

Did you get any solution to the issue?

Regards