How did you solve this? I'm trying to communicate with CPU1510 and a KTP1200 Basic through profibus and I can't solve it. Console diagnostics show "Connection disconnected" as soon as the program starts.

huynv1990

Hi Prof.Frink,

Connection HMI and PLC is established ok. HMI can get tag from PLC without error. Everything seem be good. But I can't load project to HMI by TIA Portal in real, so cannot check working HMI as well.

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Split from Connecting HMI (KTP700) to s7-1200 through profibus module CM1243-5.

Hi Murof, thanks for the help. Please see the information below.

Connection editor

PLC Firmware

HMI Firmware

PUT/GET Activated and Protection level set to FULL ACCESS

PLC DP interface

PLC DP Configuration

PLC Tags configuration

HMI Connection configuration

HMI Tags configuration

Profibus profile

During compilation i get the nfo message: The configured interface operating mode combined with the 'DP' profile setting on PROFIBUS 'PROFIBUS_1' may affect the communication via the S7 connections.

I tried change the connection speed and change the profibus profile from DP to Standart/Universal/User-Defined and the HMI never read correctly the variables.

Hello,

I want point you only to one thing, check cfg as attachment (your first screenshot) shows.

Hello,

ok but where is clear screenshot where you've set DP address and speed inside HMI? I mean under HMI cfg options if it is accessible from OS or other way, or? On other side, I recommend to you everytime set PB address 2 to CPU as std and not 1 what is for most cases as HMI address. In case all is set correctly, then do cfg of Tags again because then only this can be problem. You can also check PB network for devices accessible via some diagnostic onsode PG/PC interface if you have suitable DP adapter available or via other way, simply to be sure that all devices are accessible and configured with correct PB address, this is mandatory.

Murof

Hello

your PLC has FW 2.9-> so I suppose you work with TIA V17

-> since V17 and FW2.9 there is a topic called Secure HMI Communication.

And your HMI has only V16 Image Version.

So I would change the FW Version of the HMI to V17 and do a download with OS Update

Bye Murof

Hello Murof.

Would it also work to switch off the secure HMI communication on the PLC side? This is instead of making an OS update. (I ask for the sake of the topic.)

Regards.

Hello friends,

is this clear to me like this that in new systems is Security set as 'global', I mean to also serial connection like PB DP is? I ask for sure because of not have chance to work with new HW systems and also SW versions. Hope you understand my question.

Thanks for the help Duris.

I dont post the picture but the configuration on HMI was made. Follow your advice and put the HMI with address 1 and PLC=2 and nothing changes.