Siemens S7-300 Interrupt blocks with DPV1 functionality, System blocks with DPV1 functionality

Communication 3.4 DPV1

Interrupt blocks with DPV1 functionality

Table 3-13 Interrupt blocks with DPV1 functionality

OB	Functionality
OB 40	Process interrupt
OB 55	Status interrupt
OB 56	Update interrupt
OB 57	Vendor-specific interrupt
OB 82	Diagnostic interrupt

Note

You can now also use organizational blocks OB40 and OB82 for DPV1 interrupts.

System blocks with DPV1 functionality

Table 3-14 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 I/O modules. SFBs 52 to 54 can also be used for PN IO.

Reference

For further information on the blocks mentioned earlier, refer to the reference manual System Software for S7-300/400: System and Standard Software, or directly to the STEP 7 Online Help.

See also

PROFIBUS DP (Page 3-2)

CPU 31xC and CPU 31x, Technical data	3-33
Manual, Edition 08/2004, A5E00105475-05