Specifications

1
SECTION 1
Siemens PU (AS511)
1.1 General Information ........................................................................ 3
1.2 Technical Description ....................................................................... 4
1.3 Protocol Parameters Siemens PU AS511 ..................................................... 4
1.3.1 Parameter Maximum Waiting Time for Response ..................................... 5
1.3.2 Parameter Delay Until Connection Setup ............................................. 5
1.3.3 Parameter Fast Data Block Access ................................................... 5
1.4 Data Type Structure......................................................................... 5
1.4.1 Data Types .......................................................................... 7
1.4.2 Special Simatic Data Formats ........................................................ 7
1.5 Additional Functions ........................................................................ 8
1.6 Error Messages ............................................................................. 9
1.7 Guidance for the Employment of CPUs with 2 PU Interfaces ................................. 10