Siemens SIMATIC ET 200SP Manual page 45

5.3.4 Invalid configuration states of the ET 200SP on PROFINET IO
Invalid configuration states
The following invalid configuration states of the ET 200SP distributed I/O system lead to the
failure of the IO device or prevent data exchange.
● Number of modules exceeds maximum configuration.
● Faulty backplane bus (e.g. defective BaseUnit). ET 200SP backplane bus interruptions do
not trigger an interrupt.
● At least one I/O module is plugged into a different BaseUnit as the one configured in the
parameters.
● No server module.
● Invalid or incorrectly configured BusAdapter.
Note
Removal of the server module will trigger a station stop. All I/O modules of the ET 200SP
distributed I/O system fail (substitute value behavior) but the interface module continues to
exchange data.
Revoking the station stop (by correcting the invalid configuration state) leads to a brief failure
of the ET 200SP distributed I/O system and automatic restart.
5.3.5 Failure of supply voltage L+ at BaseUnit BU...D
Failure of the supply voltage L+
The I/O modules react as follows to failure of the supply voltage L+ on the BaseUnit BU...D:
● If an I/O module is removed during failure of the supply voltage, a pull interrupt is
generated.
● If an I/O module is installed during failure of the supply voltage, a plug interrupt is
generated.
IM 155-6 PN HF interface module (6ES7155-6AU00-0CN0)
Manual, 03/2015, A5E03915895-AF
Interrupts, error messages, diagnostics and system alarms
5.3 Alarms
45