Glossary
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SIMATIC NET NCM S7 for Industrial Ethernet
C79000-G8976-C129–06
Functions (FCs)
STEP 7 code blocks of the type ”function”.
Gateway Intelligent connectivity device that connects local area–> networks of different
types at the ISO Layer 7 level.
Industrial Ethernet
A LAN system complying with IEEE 802.3 (ISO 8802–2)
Multicast A multicast is like ”calling all group stations”: Using one multicast frame, you can
reach all the nodes that belong to the multicast group and that are prepared to
receive frames.
NCM S7 for Industrial Ethernet
Configuration software for configuration and diagnostic functions on an Ethernet
CP.
NCM S7 for PROFIBUS
Configuration software for configuration and diagnostic functions on a
PROFIBUS CP.
Network A network consists of one or more interconnected –> subnets with any number
of –> nodes. Several networks can exist side by side.
PG operation
A mode of the PROFIBUS/Ethernet CP in which the SIMATIC S7-CPU is pro-
grammed, configured or diagnosed over PROFIBUS/Ethernet. This mode is
handled by the S7 functions.
Process image
The process image is a special memory area in the programmable logic control-
ler. At the start of the cyclic program, the signal states of the input modules are
transferred to the process input image. At the end of the cyclic program, the pro-
cess output image is transferred as a signal state to the output modules.