1-7
C7-621 / C7-621 AS-i Control Systems
C79000-G7076-C621-01
The SIMATIC C7-621/C7-621 AS-i devices consist of several components
that interact with each other:
S A programmable controller CPU of the SIMATIC S7-300 class (C7 CPU),
S A line-oriented SIMATIC OP (C7 OP),
S Integrated digital and analog I/Os (C7-621 I/Os),
S A P bus connection for expanding the C7-621 with an IM 621 using
S7-300 modules,
S An MPI interface for communication with the programming device/PC
and other S7 CPUs, C7 control systems and OPs,
S An AS-interface (AS-i) for connecting sensors and actuators (version
C7-621 AS-i, see Figure 1-4)
C7-621
C7
I/Os
P bus
MPI
interface
C7 CPU C7 OP
CPU memory
C7 CPU
OP memory
C7 OP
STEP 7
ProTool Lite
or
ProTool
Figure 1-3 Components of the C7-621
The individual components integrated in the SIMATIC C7 correspond to the
components that can also be used in the modular configuration consisting of
an S7-300 CPU, OP etc. The I/O expansion via the P bus interface (IM 621)
allows the connection of a maximum of four SIMATIC S7-300 modules. The
AS-interface allows the connection of sensors and actuators to the C7-621
AS-i (Figure 1-4).
Overview of the C7
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