Siemens SIMATIC Distributed I/O ET 200eco PN Operating Instructions Manual page 269

Glossary
IO-Link
IO-Link is a point-to-point connection to conventional and intelligent sensors/actuators via
unshielded standard cable in proven 3-conductor technology. IO-Link is backwards
compatible with all DI/DQ sensors/actuators. Circuit state channel and data channel designed
in 24 VDC technology.
Isochronous real-time communication
Synchronized transmission method for the cyclic exchange of IRT data between PROFINET
devices
A reserved bandwidth is available within the send cycle for IRT IO data. The reserved
bandwidth guarantees that IRT data can also be transmitted at reserved, synchronized
intervals while other, higher network loads are active (for example, TCP/IP communication or
additional real-time communication).
MAC address
Every PROFINET device is assigned a worldwide unique device identification before it leaves
the factory. This six-byte device identification is the MAC address.
The MAC address is divided into:
• Three-byte manufacturer identification and
• three-byte device identification (consecutive number)
The MAC address is generally shown on the front of the device, for example:
08-00-06-6B-80-C0
Non-isolated
The reference potentials of the control and load circuit of non-isolated I/O modules are
electrically interconnected.
Parameter assignment
Parameter assignment is the transfer of parameters from the IO controller/DP master to the IO
device/DP slave.
PELV
Protective Extra Low Voltage = grounded protective extra-low voltage
Prioritized startup
Prioritized startup (FSU) denotes PROFINET functionality for accelerating the startup of IO
Devices for RT and IRT communication within a PROFINET IO system.
The function reduces the time that the correspondingly configured IO devices require to
return to the cyclic user data exchange in the following cases:
• After power has returned
• After station recovery
• After activation of IO Devices
270
Operating Instructions, 06/2022, A5E01250250-AN
ET 200eco PN