Communication
3.4 DPV1
CPU 31xC and CPU 31x, Technical Data
Manual, 01/2006 Edition, A5E00105475-06
3-33
Example for a CPU 317-2 PN/DP / CPU 319-3 PN/DP
The CPU 317-2 PN/DP and CPU 319-3 PN/DP provide you with 32 connection resources
(refer to Table 3-11):
• Reserve four connection resources for PG communication.
• Reserve six connection resources for OP communication.
• Reserve two connection resources for S7-based communication.
• In NetPro you configure eight S7 connection resources for S7 communication via the
integrated PROFINET interface
This leaves 12 S7 connections available for arbitrary communication services, e.g.
S7 communication, OP communication, etc.
However, only a maximum of 16 connection ressources for S7 communication at the
integrated PN interface can be configured in NetPro.
In addition, there are another 24 routing connections available for the CPU 317-2 PN/DP,
and another 48 routing connections for the CPU 319-3 PN/DP, which do not affect the
aforementioned S7 connections.
However, take the interface-specific maximum numbers into account (refer to Table 3-12).
3.4 3.4 DPV1
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.
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