Siemens SIMATIC S7-1500 System Manual page 293

IP address
The IP address is made up of four decimal numbers with a range of values from 0 through
255. The decimal numbers are separated by a dot (for example 192.162.0.0).
The IP address consists of the following:
● Address of the network
● Address of the device (PROFINET interface of the IO controller/IO device)
IRT, isochronous real time
A synchronized transmission method for the cyclic exchange of I/O data between
PROFINET IO devices.
A fixed bandwidth within the send clock is reserved for the I/O data, ensuring that the I/O
data is exchanged at equal intervals.
Isochronous mode
Signal acquisition, transmission and processing linked to a specified cycle.
Isolated modules
In the case of isolated input/output modules, the reference potentials of the control and load
circuits are galvanically isolated, e.g. by means of optical isolators, relays or transformers.
Input/output circuits can be connected to common potential.
Line Module
Self-commutated infeed/regenerative feedback unit for generating a controlled DC-link
voltage, which decouples connected Motor Modules from the line voltage and thus prevents
line voltage fluctuations within the permitted line tolerances from affecting the motor voltage.
Load current supply
Supply of the module's input and output electric circuits.
MAC address
Every PROFINET device is assigned a worldwide unique device identification before it
leaves the factory. This 6-byte long device identification is the MAC address. Each interface
and also each port has its own MAC address.
The MAC address is divided into:
● 3-byte manufacturer identification
● 3-byte device identification (consecutive number)
The MAC address is generally shown on the front of the device.
Example: 08-00-06-6B-80-C0
292
SIMATIC Drive Controller
System Manual, 11/2019, A5E46600094-AA