Configuring Hardware and Communication Connections STEP 7.pdf

Configuring Connections
FMS Interface
Communication through the FMS interface takes place only through CPs. Each
FMS connection takes up one resource at the CP for the end point. At the CPU,
each CP requires a connection resource for communication to it.
(1) Available connection resource
(2) Assigned connection resource
(3) PROFIBUS
Note
To execute programming device functions on CPs for the S7-400 through the MPI
or through the integrated DP interface, two connection resources are needed at the
CPU (for two transition points). This requirement must be taken into account in
determining the total number of configured STEP 7 connections.
S7 Connections through S7/M7-300 and C7-600
For S7 connections established via the MPI interface, only one connection
resource for the end point is occupied at the FM for an S7/M7-300 (for CPU 312-
316 only) and C7-600.
(1) Available connection resource
(2) Assigned connection resource
Configuring Hardware and Communication Connections with STEP 7
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