Glossary-6
C7-621 / C7-621 AS-i Control Systems
C79000-G7076-C621-01
In isolated input/output modules, the reference potentials of the control
circuit and the load circuit are electrically isolated by, for example,
optocouplers, relay contactors or transformers. Input/output circuits can be
connected to common potential.
L
The load memory is a part of the C7 CPU. It contains objects (load objects)
created by the programming device.
M
When you clear the –> C7 CPU, the following memories are deleted:
S The –> work memory
S The read/write memory area of the –> load memory
S The –> system memory
S The –> backup memory
and the user program is reloaded from the –> flash memory.
When you clear the –> C7 OP the following memories are deleted:
S The –> work memory
S The –> configuration memory
The C7 OP then no longer contains a user configuration.
The multipoint interface (MPI) is the programming device interface of
SIMATIC S7. It allows simultaneous operation of several nodes
(programming devices, text displays, operator panels) on one or several
CPUs. The nodes on the MPI are connected to each other via a network. Each
node is identified by a unique address (MPI address).
A network connects several C7s and/or S7-300s and further DTEs, such as
programming devices, via a –> connecting cable. Data are exchanged
between the connected devices over the network.
Isolated
Load Memory
Memory Reset
MPI
MPI Network
Glossary
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