5
Performance Data
B4 - 20
CP 443-5 Extended for PROFIBUS / Manual Part B4
Release 6/2005
C79000-G8976-C162-06
5.4
Characteristics of S7 Communication
The following data are important for operating S7 connections:
Table 5-4
Characteristic
Explanation / Values
Number of S7 connections that can be
operated via PROFIBUS
Maximum 48
(The value depends on the S7-400 CPU being used.)
5.5
Parallel Use of Communications Services (Multiprotocol
Operation)
If you use the available communication services at the same time, certain
restrictions result in terms of the communications performance.
To illustrate the relationship between the connection types, the DP mode, and
configured connections, the following values apply to the typical configurations.
Table 5-5
Connection Type
Number of Connections
With the DP Configuration
FDL connections
32
No DP
32
with DP mode
S7 connections
48
No DP
48
with DP mode
FDL and S7 connections
1)
59
No DP
54
with DP mode
1) one additional 1 S7 connection can be set up online (for example for routing)
Note
If PG or HMI functions or data record routing are used, a suitable number of S7
connections must be reserved during configuration!
