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Old January 12th, 2007, 07:48 AM   #1

M/B is offline
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Join Date: Apr 2006
Location: Lokeren
Posts: 5
Smile Global Data Communication with Siemens S7-300


I'm having some trouble generating a communication error on a global data communication link using a Siemens S7-300 setup.
The guys & girls who have already worked with this setup will know that you can pick up on a communication error using the GDS, the Global Data Status. This is a Status Double Word from which you can monitor bits that tell you when a communication fault occurs. In order to simulate a communication problem, I've pulled the plug of the MPI network cable while monitoring the GDS, but I don't see any bits changing.

If anyone of you has experienced similar problems or succeeded in configuring Global Data Communication with the same setup, please feel free to share the knowledge.

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Old January 12th, 2007, 08:13 AM   #2

tarok.seal is offline
Join Date: Dec 2004
Location: Kolkata
Posts: 18


In GDS communication table,two nos. configuration is require.

1.Send Bit/Byte/WOrd/DWord -CPU 1

2.Received Bit/Byte/WOrd/DWord- CPU 2

If communication problem is create the Bit/Byte/WOrd/DWord will be
changes in CPU 2 as per your program configuration.

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