Siemens SIMATIC S7-1500 System Manual page 231

CPU
The CPU uses the integrated system power supply to supply the electronics of the modules
via the backplane bus. The 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, programming
devices, other controllers and other systems. The S7-1500 CPUs support operation as an IO
controller and I-device. Similarly to the PROFINET interface, the PROFIBUS interface
available on some of the S7-1500 CPUs allows communication with other devices. When the
interface is used as PROFIBUS DP interface, the CPU on the PROFIBUS DP also assumes
the role of a DP master.
Crimping
Procedure whereby two components joined together, e.g. wire end ferrule and cable, are
connected with one another through plastic strain.
Device names
Before an IO device can be addressed by an IO controller, it must have a device name. This
approach was chosen for PROFINET because names are easier to administer than complex
IP addresses.
An IO device has no device name upon delivery. An IO device can only be addressed by an
IO controller - e.g., for transferring configuration data (including the IP address) during
startup, or for user data exchange during cyclic operation - after it has been assigned a
device name with the programming device/PC.
Diagnostics
Monitoring functions for the detection, localization, classification, display, and further
evaluation of errors, faults, and alarms. They run automatically while the system is in
operation. This increases the availability of systems by reducing commissioning times and
downtimes.
Distributed I/O system
System with I/O modules that are configured on a distributed basis, at a large distance from
the CPU controlling them.
DP
Distributed I/O
Equipotential bonding
Electrical connection (potential equalization conductor) that brings the bodies of electrical
equipment and other conductive bodies to the same or almost the same potential, in order to
prevent disruptive or dangerous voltages between these bodies.
Automation system
System Manual, 12/2014, A5E03461182-AC
Glossary
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