SSD Drives DIGIVEX Motion PVD 3554, Руководство пользователя и по вводу в эксплуатацию

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DIGIVEX Motion - PROFIBUS
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PVD 3554 GB 01/2004
2.2 Acyclical data transmission
Extended PROFIBUS-DP functions (DPV1)
The PROFIBUS-DP extensions DPV1 include the definition of an acyclic data exchange which
takes place at the same time as the cyclical data transmissions.
Acyclic data transmission is used for:
• exchanging large quantities (up to 240 bytes) of useful data.
• simultaneous access by other PROFIBUS masters (class 2 master, e.g. PME (Parvex Motion
Explorer) start-up tool)
• reducing the bus cycle time by removing the PKW area from cyclical transmission and assigning
it to acyclical data transmission.
Implementing the extended PROFIBUS-DP functionality
The different masters and/or the different types of data exchange are represented by channels in
DIGIVEX Motion:
• Acyclic data exchange with the same class 1 master (if supported).
Use of DPV1 READ and WRITE functions.
The contents of the transmitted data block correspond to the structure of the acyclic parameter
channel as defined in the PROFIdrive Profile version 3.0 (with data block 47).
• Acyclic transmission using the PME, Parvex Motion Explorer, start-up tool (class 2 master)
PME can acyclically access parameter and process data in the drive.
• Acyclic transmission with an HMI (second class 2 master) which can acyclically access
parameters in the drive.