System Manual – MOVIDRIVE® compact Drive Inverters
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Starting the inverter with PROFIBUS-DP (MC_41A)
Startup
Control example
for Simatic S7
The drive inverter is controlled using Simatic S7 in accordance with the selected process
data configuration either directly using load and transfer commands or by means of
special system functions SFC 14 DPRD_DAT and SFC15 DPWR_DAT.
In principle, S7 data lengths of 3 bytes or more than 4 bytes must be transmitted using
system functions SFC14 and SFC15. Consequently, the data in the following table
applies:
STEP7 example
program
In this example, the project planning for MOVIDRIVE
®
compact
has the process data
configuration "3 PD" at input addresses PIW576... and output addresses POW576.... A
data block DB3 is created with about 50 data words.
When SFC14 is called, the process input data is copied to data block DB3, data words
0, 2 and 4. When SFC15 is called after the control program has been processed, the
process output data are copied from data words 20, 22 and 24 to the output address
POW 576 ...
Note the length information in bytes for the RECORD parameter. The length information
must correspond to the configured length.
Refer to the online help for STEP7 for further information about the system functions.
Process data configuration
Program access
1 PD
Load / transfer commands
2 PD
Load / transfer commands
3 PD
System functions SFC14/15 (length 6 bytes)
6 PD
System functions SFC14/15 (length 12 bytes)
10 PD
System functions SFC14/15 (length 20 bytes)
Param + 1 PD
Parameter channel: System functions SFC14/15 (length 8 bytes)
Process data: Load / transfer commands
Param + 2 PD
Parameter channel: System functions SFC14/15 (length 8 bytes)
Process data: Load / transfer commands
Param + 3 PD
Parameter channel: System functions SFC14/15 (length 8 bytes)
Process data: System functions SFC14/15 (length 6 bytes)
Param + 6 PD
Parameter channel: System functions SFC14/15 (length 8 bytes)
Process data: System functions SFC14/15 (length 12 bytes)
Param + 10 PD
Parameter channel: System functions SFC14/15 (length 8 bytes)
Process data: System functions SFC14/15 (length 20 bytes)
0
0
I
Summary of Contents for MOVIDRIVE compact MCH41A
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