PROFIBUS DP Communication
8.9 DP slave SINAMICS S120
Manual
Commissioning Manual, 05/2008, 6FC5397–4CP10–4BA0
293
Note
To prevent changes to the I/O addresses in the NC machine data, we recommend using the
default machine data values when assigning I/O addresses:
•
Drive objects: "Drive control":
MD13050 $MN_DRIVE_LOGIC_ADDRESS[n], n = 0,1,...
Standard values: 4100 + n*40
•
Drive objects: "Control Unit":
MD13120 $MN_CONTROL_UNIT_LOGIC_ADDRESS[n], n = 0,1,...
Standard values: 6500 (1. CU), 0 (all other CUs)
Dialog
Dialog: DP slave properties
Tab: Configuration
Tab card: Details
Table entry: PROFIBUS Partner, I/O address: <I/O address>
OK
On confirming the dialog with "OK", the "DP Slave Properties" dialog box is closed. Step 1 of
parameterization of DP slave S120 is then complete.
Consistency
The default setting with regard to the consistency of the I/O data is whole length.
This setting results in:
●
Direct accesses from the PLC user program (e.g. byte, word or double word) to this
address range are not permitted by the PLC operating system.
●
Accesses to this address range must be carried out using the system functions SFC 14
and SFC 15.
●
The system functions SFC 14 and SFC 15 ensure consistent reading/writing of the data
of an axis, e.g.:
–
Message frame type 102: 6 words for the set value or 10 words for the actual value
●
Because DP slaves 611U can be assigned both to the NC and to the PLC, check system
functions SFC 14 and SFC 15 when writing data to see whether the drive belongs to the
writing component. If this is not the case, the data access is denied.