Siemens S7-300 Definition DPV1, Requirement for using the DPV1 functionality with DP slaves

Communication 3.4 DPV1

3.4DPV1

New automation and process engineering tasks require the range of functions performed by the existing DP protocol to be extended. In addition to cyclical communication functions, acyclical access to non-S7 field devices is another important requirement of our customers, and was implemented in the standard EN 50170. In the past, acyclical access was only possible with S7 slaves. The distributed I/O standard EN 50170 has been further developed. All the changes concerning new DPV1 functions are included in IEC 61158/ EN 50170, volume 2, PROFIBUS.

Definition DPV1

The term DPV1 is defined as a functional extension of the acyclical services (to include new interrupts, for example) provided by the DP protocol.

Availability

All CPUs with DP interface(s) and serving as DP masters feature the enhanced DPV1 functionality.

Note

If you want to use the CPU as an intelligent slave, remember that it does not have DPV1 functionality.

Requirement for using the DPV1 functionality with DP slaves

For DPV1 slaves from other vendors, you will need a GSD file conforming to EN 50170, revision 3 or later.

Extended functions of DPV1

•Use of any DPV1 slaves from external vendors (in addition to the existing DPV0 and S7 slaves, of course).

•Selective handling of DPV1-specific interrupt events by new interrupt blocks.

•Reading/writing SFBs that conform to standards to the data record (although this can only be used for centralized modules).

•User-friendly SFB for reading diagnostics.

3-32	CPU 31xC and CPU 31x, Technical data
	Manual, Edition 08/2004, A5E00105475-05