Glossary - Siemens SIMATIC S7-1500 Operating Instructions Manual

Glossary

Cold restart
The controller executes OB 102 before the start of the free scan cycle (OB 1). Like a warm
restart, a cold restart resets the peripheral inputs (PI) and changes the peripheral outputs
(PQ) to a pre-defined safe state (default is 0). However, a cold restart does not save the
retentive memory (M, T, C, or DB), but sets these areas to their default settings.
Communication interface
CP card that is used for communication by the CPU, PROFIBUS interface built into the
Siemens PC or Industrial Ethernet interface.
CP card
Communications processor
Cycle time
The cycle time is the time required to execute the complete scan cycle.
Industrial Ethernet
Physical communication layer that supports communication with STEP 7, S7 CPUs, PGs,
OPs, S7 applications, and PROFINET IO.
Load memory
Memory area (RAM) allocated for all of the blocks downloaded from STEP 7 excluding the
symbol table and comments.
NVRAM
Non-Volatile Random Access Memory: Non-volatile memory area
PC system
Representation of a software-based virtual rack in STEP that defines a PC-based
automation system.
PG
Programming device
CPU 1505SP (F) Ready4Linux Version 2.7
Operating Instructions, 05/2019, A5E46864285-AA
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