Siemens Simatic S7-1500 Manual - Page 13

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Siemens Simatic S7-1500 Manual
3 Principle of Operation

3.2 Blocks

Figure 3-4: Block call diagram for SIMATIC S7-1500
Main
[OB1]
Cyclic interrupt
[OB30]
The UssCyclic and UssCyclicInterrupt user blocks use optimized block access.
3.2
Blocks
3.2.1

UssCyclicInterrupt [FB2]

Call
All activities relating to processing USS communication for the communication
module with the parameterized hardware ID should be combined in this block.
Figure 3-5: UssCyclicInterrupt user FB
The block name is intended to indicate that the block is called by the cyclic interrupt
OB.
SINAMICS V20 at S7-1200/1500 via USS
Entry ID: 109480894,
V1.0,
UssCyclic
[FB1]
UssCyclicInterrupt
[FB2]
User program
09/2018
USS_Drive_Control
[FB631]
USS_Port_Scan
[FB630]
System blocks
InstUssCyclic
[DB1]
(instance DB of FB
UssCyclic
)
instUssDriveControl
USS_DB
InstUssCyclicInterrupt
[DB2]
(instance DB of FB
UssCyclicInterrupt
)
Data blocks
13