Siemens SIMATIC S7-300 Quick Start Manual page 77

M
Memory Reset The memory reset function deletes the following memories in the CPU:
(MRES)
Multipoint The multipoint interface is the programming device interface in SIMATIC
Interface (MPI)
S7. It allows a number of programming devices, text display operator
interfaces, and operator panels to be accessed from a central point. The nodes
on the MPI can communicate with each other.
N
Network A network consists of one or more connected subnets (for example, Industrial
Ethernet, PROFIBUS, MPI) with any number of nodes. Several networks can
exist side by side.
O
Organization Block
Organization blocks form the interface between the CPU operating system
(OB) and the user program. The sequence in which the user program should be
processed is laid down in the organization blocks.
P
Process Image
The signal states of the digital input and output modules are stored in the
CPU in a process image. There is a process-image input table (PII) and a
process-image output table (PIQ).
Programming A personal computer with a special compact design, suitable for industrial
Device (PG) conditions. A programming device is completely equipped for programming
the SIMATIC programmable logic controllers.
Project
A project is a container for all objects in an automation task, independent of
the number of stations, modules, and how they are connected in a network.
Primer: S7-300 Programmable Controller, Quick Start
C79000-G7076-C500-01
Work memory
Read/write area of the load memory
System memory with the exception of the MPI parameters and the
diagnostic buffer
Glossary
Glossary-3