Glossary
S7-1500R/H redundant system
System Manual, 10/2018, A5E41814787-AA
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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.
Cycle control point
The cycle control point marks the end of a cycle and the start of the next cycle. The cycle
time statistics and monitoring of the configured maximum cycle time start at the cycle control
point.
Once the cycle control point has been reached, the CPU writes the process image output to
the output modules, reads the state of the inputs to the input modules and then executes the
first cyclic OB.
In redundant mode, the cycle control point is reached as soon as the backup CPU reports
the end of the cycle to the primary CPU.
Summary of Contents for Simatic S7-1500H
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