Distribution And Availability Of S7 Connection Resources; Table 3-10 Distribution Of Connections - Siemens CPU 31 Series Technical Data Manual

Communication
3.3 S7 connections
See also
Open communication via Industrial Ethernet (Page 3-24)
3.3.3

Distribution and availability of S7 connection resources

Distribution of connection resources
Table 3-10 Distribution of connections
Communication service
PG communication
OP communication
S7 basic communication
S7 communication
Other communication resources (e.g. via
CP 343-1, with a data length of
> 240 bytes)
Routing PG functions
(only for CPUs with DP/PN interface)
Global data communication
Point-to-point communication
PROFIBUS DP
PROFINET CBA
PROFINET IO
Open communication by means of TCP/IP
Open communication by means of ISO on
TCP
Open communication by means of UDP
SNMP
3-30
Distribution
In order to avoid allocation of connection resources being dependent only on
the chronological sequence in which various communication services are
requested, connection resources can be reserved for these services.
For PG and OP communication respectively, at least one connection
resource is reserved by default.
In the table below, and in the technical data of the CPUs, you can find the
configurable S7 connection resources and the default configuration for each
CPU. You "redistribute" connection resources by setting the relevant CPU
parameters in STEP 7.
Available connection resources that are not specially reserved for a service
(PG/OP communication ,
S7 basis communication) are used for this.
The CPUs provide a certain number of connection resources for routing.
These connections are available in addition to the connection resources.
The subsection below shows the number of connection resources.
This communication service requires no S7 connection resources.
This communication service requires no S7 connection resources.
This communication service requires no S7 connection resources.
This communication service requires no S7 connection resources.
This communication service requires no S7 connection resources.
Independently of the S7 connections, a total of 8 own resources are available
for connections or local access points (UDP) for TCP/IP, ISO on TCP, UDP.
This communication service requires no S7 connection resources.
CPU 31xC and CPU 31x, Technical Data
Manual, 01/2006 Edition, A5E00105475-06