Siemens SIMATIC Distributed I/O ET 200eco PN Operating Instructions Manual page 267

Glossary
Device name
Because a fixed IP address is assigned to the device name, an IO Device must have a device
name in order to be addressed by an IO Controller. With PROFINET, this procedure is used
because names are easier to handle than complex IP addresses.
The assignment of a device name for a specific IO Device can be compared with the setting of
the PROFIBUS address for a DP slave.
In the state of delivery a IO Device has no device name. The IO Device can only be addressed
for an IO Controller after the device has been assigned a device name with the IO
Supervisor/PC, for the transfer of configuration data (IP address and other data) during
startup or for the exchange of user data in cyclic operation, for example.
Device replacement without removable media/programming device
IO Devices having this function can be replaced easily:
• A removable medium (such as SIMATIC Memory Card) on which the device name is stored
is not required.
• The device name does not have to be assigned using the programming device.
Instead of being assigned a device name from the removable medium or programming
device, the IO Device is now assigned a device name by the IO Controller.
The IO Controller uses the configured topology and the correlations derived from the IO
Devices. The configured target topology must agree with the actual topology.
Diagnostics
The detection, localization, classification, visualization and further evaluation of errors,
disturbances and messages.
Provides monitoring functions which are executed automatically when the system is in RUN.
Increases plant availability by reducing commissioning times and down times.
Distributed I/O systems
Systems with input and output modules that are configured on a distributed basis at greater
distance from the controlling CPU are, for example:
• ET 200AL, ET 200eco PN, ET 200M, ET 200MP, ET 200pro, ET 200S, ET 200 SP
• DP/AS-I Link, etc.
Electrically isolated
The reference potentials of the control and load circuit of isolated I/O modules are electrically
isolated, for example, by means of optocoupler, relay or transformer. I/O circuits can be
connected to the same potential.
Equipotential bonding
Electrical connection (equipotential bonding conductor) that keeps electrical equipment and
extraneous conductive objects to the same or almost the same potential in order to prevent
disturbing or dangerous voltages between those objects.
268
Operating Instructions, 06/2022, A5E01250250-AN
ET 200eco PN