CPU Function, depending on CPU and STEP 7 Version
4-5
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
Connection resources
CPU 318-2 CPUs 312IFM to 316-2DP
CPU 318-2 provides a total of 32
communication resources, that is, 32 of
those via MPI/DP interface or 16 via DP
interface.
Those connection resources are freely
available for
PD/OP communication
S7 basic communication
S7 communication and
Routing of PD communication
The CPUs provide a specific number of
connection resources.
For
PD communication
OP communication and
S7 basic communication
you can reserve connection resources
which can then not be used by any other
communication function.
The remaining connection resources are
then available for PD/OP/S7 basic and S7
communication.
For routing, the CPUs 315-/316-2 provide
additional connection resources for 4
routing connections.
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