Siemens SIMATIC S7-1200 Manuel - Page 13

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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