Implementation With Simatic S7-1500 - Siemens SINAMICS V20 Manual

3 Principle of Operation
3.1 Complete overview
Note Know-how protected use of the UssCyclic user block in a library is not possible.
Reason:
The USS_DRV system FB cannot put its data into the InstUssCyclic instance DB
of the calling UssCyclic block as a multi-instance; it uses the InstUssDrv single
instance. This is necessary as the USS_PORT system FB can only access the
entire instance DB of USS_DRV via its USS_DB formal parameter of the
USS_BASE data type; it cannot access an instance data block within
InstUssCyclic.
3.1.3

Implementation with SIMATIC S7-1500

Use the following system instructions:

USS_Port_Scan
to process communication via the USS

USS_Drive_Control
to prepare the send data and evaluate the response data
These system instructions can be found in the Instructions task card,
Communication.
Figure 3-3: USS instructions for S7-1500
SINAMICS V20 at S7-1200/1500 via USS
Entry ID: 109480894, V1.0, 09/2018
®
network
12