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| 7/12/2012 2:33 PM | |
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Posts: 2 Rating:
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Hey I read some parameters via the blocks SFB 52 and SFB 53, but I do not understand how these blocks one difference between PKW and PZD Nick |
| 7/12/2012 6:32 PM | |
Joined: 8/31/2005 Last visit: 9/12/2025 Posts: 2198 Rating:
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From "Connecting a SINAMICS G120 drive to a S7-300/400 CPU via PROFINET or PROFIBUS-DP in STEP 7 V5" (Chapter 2.2.2 of PROFIBUS version): Acyclic data exchange (parameter access) The original PROFIBUS specification (now known as PROFIBUS DPV0) only provided the exchange of cyclic data. To be able to transfer parameters, telegram types were defined where four words are provided for a parameter transfer. Since these four words, like the process data, are always sent, a permanent communication load is produced even though the parameters themselves are generally only rarely transferred.PROFIBUS DPV1 provides the option of using an acyclic data exchange in addition to the cyclic data exchange, which is only inserted on demand. This makes it possible to transfer the parameter area acyclically on demand, without creating a permanent communication load. The acyclic transfer takes clearly longer than the cyclic transfer of the process data. |
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| 7/13/2012 8:26 AM | |
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Posts: 2 Rating:
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hi thanks for the reaction. |
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