Glossary
S7-1500R/H redundant system
504 System Manual, 01/2024, A5E41814787-AF
Bus, self-assembling
The modules are lined up on the rail. They are mechanically and electrically connected to
each other with a U-connector as they are swiveled into position. In this way the bus is
extended with each module.
Code block
In SIMATIC S7, a code block contains part of the STEP 7 user program.
Configuration
Systematic arrangement of the individual modules (configuration).
Connection plug
The connection plug provides the physical connection between devices and the cable, for
example.
Consistent data
Consistent data is data that belongs together in terms of content. Consistent data items are
read and written together.
Counter
Counters are components of the system memory of the CPU. You can modify the content of
the "counter cells" using STEP 7 instructions. Example: counting up or down).
CPU
The Central Processing Unit (CPU) contains the operating system and executes the user
program. The user program is located on the SIMATIC memory card and is processed in the
work memory of the CPU. The PROFINET interfaces on the CPU allow simultaneous
communication with PROFINET devices, PROFINET controllers, HMI devices and PGs/PCs.
Crimping
Procedure whereby two components joined together, e.g. wire end sleeve and cable, are
connected with one another through plastic strain.
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