Distribution And Availability Of S7 Connection Resources; Table 4-6 Distribution Of Connections; Table 4-7 Availability Of Connection Resources - Siemens SIMATIC S7-400 Manual

4.3.3

Distribution and availability of S7 connection resources

Distribution of connection resources
Table 4-6 Distribution of connections
Communication service
Programming device communication
OP communication
S7 basic communication
S7 communication
Other communication connections (e. g. via
CP)
Routing PG functions
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
Web
SNMP
Availability of connection resources
Table 4-7 Availability of connection resources
CPU Total number
connection resources
416-3 PN/DP 64
414-3 PN/DP 32
S7-400 Automation System, CPU Specifications
Manual, 10/2006, 6ES7498-8AA04-8BA0
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.
This communication service uses no S7 connection resources.
This communication service uses no S7 connection resources.
This communication service uses no S7 connection resources.
This communication service uses no S7 connection resources.
This communication service uses S7 connection resources.
This communication service uses S7 connection resources.
This communication service uses S7 connection resources.
This communication service uses no S7 connection resources.
This communication service uses no S7 connection resources.
Reserved for
Programming OP
device communication
communication
1 1
1 1
Communication
4.3 S7 connections
Free
S7 connections
Displays all non-reserved S7 connection
resources as free connection resources.
4-21