Communication with the S7-300
5.2 DPV1 (X1 only as PROFIBUS DP interface)
Note
You can now also use organizational blocks OB40 and OB82 for DPV1 interrupts.
System blocks with DPV1 functionality
Table 5-2 System function blocks with DPV1 functionality
SFB Functionality
SFB 52 Read data record from DP slave or centralized module
SFB 53 Write data record to DP slave or centralized module
SFB 54 Read additional alarm information from a DP slave or a centralized module in the
relevant OB.
SFB 75 Set any interrupts for intelligent slaves
Note
You can also use SFB 52 to SFB 54 for centralized input/output modules.
Reference
Further information
• about migrating to the Technology CPU can be found in chapter
Information about
migrating to a Technology CPU.
• about the blocks mentioned above can be found in the reference manual
System
Software for S7-300/400: System and Standard Software
, or directly to the
STEP 7
Online Help
.
S7-300 CPU Data: CPU 315T-2 DP
5-6 Manual, 12/2005, A5E00427933-02
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