Can't connect WinCC 6 to the PLC

Sake_no_oni

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• Aug 16, 2013

• #1

Dear Sirs,
I’m having some troubles with connecting WinCC 6 to my Siemens PLC (6ES7 307-1EA00-0AA0) via TCP/IP. The Ethernet module (6HK7 343-1CX00-0XE0) seems to be configured correctly, as well as its physical connection to the PLC. When I activate the runtime I have all tags’ status “no PLC connection”, BUT there is some package exchange between the PLC and a computer. The package exchange starts the same moment the runtime is being activated. TCP/IP driver’s properties and system parameters are ok, computer and PLC are both in the same subnet and the module’s rack and slot numbers are specified correctly, the SQL server is also on. I can’t figure out what exactly I’m doing wrong. Any help appreciated!
Best regards!

 

JesperMP

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• Aug 16, 2013

• #2

the module’s rack and slot numbers are specified correctly

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What exactly are they set to ?

I assume you can ping the CP343-1 from the WinCC PC ?

 

Sake_no_oni

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• Aug 16, 2013

• #3

Yes, ping is OK. Rack #0 and slot #10.

 

JesperMP

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• Aug 16, 2013

• #4

Set it to Rack=0 and slot=2.
Then it will work, unless of course there are more mistakes.

 

Sake_no_oni

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• Aug 16, 2013

• #5

I mean Ethernet module is in slot 10, PLC is in slot 2

 

JesperMP

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• Aug 16, 2013

• #6

Just do as I wrote. Set the WinCC communication partner to rack=0, slot=2.

 

Sake_no_oni

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• Aug 16, 2013

• #7

Ok, I'll try that. Thanks!!

 

Sake_no_oni

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• Aug 20, 2013

• #8

Connection is on, thanks! Unfortunately, another problem appeared. The analog tags do not show current values, instead they show zeros, and their connection to the PLC is not stable: it turns on and off all the time. But, in the same time, the discrete tags are absolutely ok, and their connection is stable. I’ve forgotten to mention that there is a Simatic HMI panel connected to the PLC via MPI. Could it cause the trouble?
Regards!