Siemens CPU 314 Reference Manual

CPUs
1-15
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
Connection Resources for CPU 318-2
Table 1-8 Communication Resources for CPU 318-2
Communication Function
Description
PD/OP communication The CPU 318-2 provides a total of 32 connection resources (with CPU
as connection terminal point) for these communication functions. Those
32 connection resources can be freely allocated to the various
communication functions.
S7 basic communication
When allocating connection resources, you should observe the following
points:
 The number of connection resources differs for each interface as
follows:
Routing of PD functions
– MPI/DP Interface 32 communication resources
– DP-SS: 16 communication resources
 In the case of connections that do not have the CPU as their terminal
point (e.g. an FM or in the case of routing) you must deduct 2
connection resources from the total resources and 1 connection
S7 communication
resource per interface.
Figure 1-3 shows the principle of allocation of connection resources.
An example of how connection resources are dimensioned is found in
Chapter LEERER MERKER.
Principle of Connection Resource Allocation for CPU 318-2
CPU 318-2
MPI/DP
DP
32 connection resources for
connections via the MPI/DP
interface
16 connection resources for
connections via the DP
interface
A total of 32 connection
resources for connections via
the MPI/DP and/or DP
interface
Figure 1-3 Principle of Connection Resource Allocation for CPU 318-2

Siemens CPU 314 Specifications

General

Brand	Siemens
Model	CPU 314
Category	Controller
Language	English