Siemens SIMATIC ET 200SP HA System Manual page 141

Switch
PROFINET is a line shaped network. The communication nodes are linked by means of a passive
cable - the bus.
By contrast, Industrial Ethernet consists of point-to-point connections: each communication
node is interconnected directly with precisely one other communication node.
If a communication node is linked to several communication nodes, this communication node
is connected to the port of an active network component - the switch. Other communications
devices (including switches) can then be connected to the other ports of the switch. The
connection between a communication node and the switch remains a point-to-point
connection.
The task of a switch is thus to regenerate and distribute received signals. The switch "learns" the
Ethernet address(es) of a connected PROFINET device or additional switches and only forwards
those signals that are intended for the connected PROFINET device or switch.
A switch has a specific number of connections (ports). You connect at most one PROFINET device
or additional switch to each port.
Technology object
A technology object supports you in the configuration and commissioning of a technological
function.
The properties of real objects are represented by the technology objects in the controller. Real
objects can be, for example, controlled systems or drives.
The technology object includes all data of the real object that is required for its open-loop or
closed-loop control, and it signals the status information.
TIA Portal
Totally Integrated Automation Portal
The TIA Portal is the key to the full performance capability of Totally Integrated Automation. The
software optimizes all operating, machine and process sequences.
Transmission rate
Speed of the data transfer. It indicates the number of bits per second transferred (transfer rate
= bit rate).
TWIN ferrule
Ferrule for two cables
Value status
The value status is the binary additional information of a digital signal. The value status is
entered in the process image of the input and provides information on the validity of the signal.
Modules for devices in a hazardous area
System Manual, 04/2021, A5E50165138-AA
Glossary
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