Lenze Drive Server Bus server S7 getting started Manual de usuario descargar pdf (Pagina 33)

Busserv er S7

94 Busserver S7 DE/EN 1.0

Note!

If you want to address drive controllers connected to the PROFIBUS master of the CPU and drive

controllers connected to an external PROFIBUS communication processor (CP), it must be ensured that

each PROFIBUS address is only assigned once.

It is not possible to address two drive controllers with the same PROFIBUS address, even if the drive

controllers are operated at different PROFIBUS strings.

Tip!

• You can use the provided example program ”Ldsexmp2.arj” for testing.

• If possible, the drive controllers should always be operated at the PROFIBUS master of the CPU,

since communication will thus be slightly faster.

5.6.4 Accessing process and parameter data from the PLC

The foll owing functions from the ”LenzeDriveServer” library c an be used to access process and

parameter data from the PLC:

Block

number

Symbolic block

name

Function

FC90 FC Parameter Function used to write parameter data jobs in DB S7PAR.

FC91 FC Process Data Function for process data access (3 process data w ords)

FC92 FC Process Data Function for process data access (2 process data w ords)

FC93 FC Process Data Function for process data access (3 process data w ords)

• When using an external PROFIBUS communication processor (CP)

FC94 FC Process Data Function for process data access (2 process data w ords)

• When using an external PROFIBUS communication processor (CP)

For information about the basic structure of such a project, please see chapter 5.2. (^ 85)

Tip!

• The aforementioned example program ”Ldsexmpl.arj” contains both OPC and PLC accesses,

and can be used as basis for your own program developments.

• An explanation o f the function parameters for FC90 ... FC94 can be found in the Appendix.

(^ 100)

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Lenze Drive Server Bus server S7 getting started Manual de usuario Pagina 33