7 Expansion to multiple Slaves 
7.2 Expansion to multiple slaves with S7-1500 
 
SINAMICS V20 at S7-1200/1500 via USS 
Entry ID: 109480894,    V1.0,    09/2018 
 
 Siemens AG 2018 All rights reserved 
Open the newly created block UssCyclic_1. Now adjust the number of calls of 
USS_Drive_Control in the block to the number of drives in the new 
communication module. For the remaining calls of USS_Drive_Control, replace 
the instance. 
Open the cyclic interrupt OB Cyclic_interrupt_1. Here the call of the 
UssCyclicInterrupt block can be retained. However, supply it with a new instance 
data block. 
 
The hwIdentifier input must contain a reference to the new communication 
module. 
 
The USS_DB input must contain a reference to the USS_DB tag. This tag is 
located in the new instance data block of UssCyclic_1. 
 
Compile the entire STEP7 program.