Siemens SIMATIC S7-1500 System Manual page 232

Glossary
F-CPU
An F-CPU is a central processing unit with fail-safe capability that is permitted for use in
SIMATIC Safety. A standard user program can also be run on the F-CPU.
Firmware update
Updating the firmware of modules (interface modules, I/O modules, etc.), for example after
functional expansions, to the latest firmware version (update).
Functional ground
The functional ground is a low-impedance current path between electric circuits and ground.
It is not designed as a safety measure but instead, for example, as a measure to improve
noise immunity.
Ground
Conductive earth whose electrical potential can be set equal to zero at any point.
All interconnected, inactive parts of a piece of equipment that cannot accept any dangerous
contact voltage, even in the event of a fault.
Ground
Conductive earth whose electrical potential can be set equal to zero at any point.
All interconnected, inactive parts of a piece of equipment that cannot accept any dangerous
contact voltage, even in the event of a fault.
Grounding
Grounding means connecting an electrically conductive part to a grounding electrode by
means of a grounding system.
GSD file
As a Generic Station Description, this file contains all properties of a PROFINET or
PROFIBUS device that are necessary for its configuration.
I/O modules
All modules that can be operated with a CPU or an interface module.
Identification data
Information that is saved in modules, and that supports the user in reviewing the system
configuration and locating hardware changes.
232
Automation system
System Manual, 12/2014, A5E03461182-AC