GE ecomagination Profibus DP AF-650 GP Instruction Manual page 8

1.6.2 Network Topology
Multiple master
Features of a Master Class 1 connection
- Cyclical data exchange (DP V0)
- Acyclical read/write on parameters
- Extended diagnostics
The acyclical connection is fixed, and cannot be changed during operation.
Features of a Master Class 2 connection:
- Initiate / Abort acyclical connection
- Acyclical read/write on parameters
The acyclical connection can be established (Initiate) or removed (Abort) dy-
namically even when a Master Class 1 is active on the network. The DP V1
acyclical connection can be used for general parameter access as an alter-
native to the PCV parameter channel.
The PROFIBUS DP extension DP V1 permits acyclical as well as cyclical data communication. This feature can be used by a DP Master Class 1 (e.g., PLC), as well
as a DP Master Class 2 (e.g., PC tool).
1.7 Assumptions
This manual assumes you are using the AF-6 Series Drives Profibus DP Communications Module in conjunction with an AF-650 GP or AF-600 FP drive. It is also
assumed that your master is a PLC or PC equipped with a serial communication card supporting all the PROFIBUS communication services required by your
application, and that all requirements stipulated in the PROFIBUS standard, as well as those set up in the PROFIBUS Variable Speed Drive Profile and its compa-
ny-specific implementation PROFIdrive, as well as those pertaining to the AF-6 Series Drive are strictly observed as well as all limitations therein fully respected.
1.8 Hardware
This Instruction Manual refers to the Profibus network Model No. OPCPDP.
The Profibus Option will be identified as: OPCPDP Profibus DP V1 in ID-60 Option Mounted.
1.9 Background Knowledge
The Profibus DP Communications Module is designed to communicate with any master complying with the PROFIBUS standard. Familiarity with the PC or PLC
you intend to use as a master in your system is assumed. Issues regarding hardware or software produced by other manufacturers are beyond the scope of
this manual, and are not the responsibility of GE.
If you have questions regarding set-up of master-to-master communication, or communication to a non-GE slave, please consult the appropriate manuals.
1.10 Available Literature
For additional AF-6 Series Drives information please visit www.geelectrical.com/drives.
AF-650 GP/AF-600 FP Profibus DP Instruction Manual
1.2: PROFIBUS DP V1
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