Siemens IM 155-6 PN ST Manual page 17

Be aware of the following constraints:
● Resetting to factory settings deletes the device name in both the interface module and the
BusAdapter. To prevent the device name from being deleted in the BusAdapter, you can
remove the BusAdapter from the interface module before resetting to factory settings.
● When a BusAdapter is replaced, a device name stored in the BusAdapter is applied to the
interface module after a POWER ON.
● Do not pull/plug the BusAdapter while under voltage. If you pull/plug the BusAdapter
while under voltage, the interface module restarts.
Device replacement with topological configuration
IO devices with this function can be replaced in a simple manner:
● The device name does not have to be assigned with the programming device.
The replacement IO device is assigned the device name by the IO controller and not by the
programming device. The IO controller uses the configured topology and the neighboring
relationships determined by the IO devices for this purpose. All involved devices must
support the LLDP protocol (Link Layer Discovery Protocol). The configured target topology
must match the actual topology.
IO devices that have already been used in another configuration should be reset to their
factory settings before reuse (see system manual ET 200SP distributed I/O system
(http://support.automation.siemens.com/WW/view/en/58649293)).
You can find more information on this topic in the STEP 7 online help and:
● As of STEP 7 V12, in the PROFINET with STEP 7 V13
(http://support.automation.siemens.com/WW/view/en/49948856) function manual
● As of STEP 7 V5.5, in the system manual PROFINET System Description
(http://support.automation.siemens.com/WW/view/en/19292127)
Replacement of an IM 155-6 PN ST
In a replacement scenario, any IO devices in operation must be reset to their as-delivered
state via "Reset to factory settings" (see the system manual ET 200SP distributed I/O
system (http://support.automation.siemens.com/WW/view/en/58649293)).
Media redundancy (MRP)
Function for safeguarding communication and plant availability. A ring topology ensures that
an alternative communication path is made available if a transmission route fails.
You can find more information on this topic in the STEP 7 online help and:
● As of STEP 7 V12, in the function manual PROFINET with STEP 7 V13
(http://support.automation.siemens.com/WW/view/en/49948856)
● As of STEP 7 V5.5, in the system manual PROFINET System Description
(http://support.automation.siemens.com/WW/view/en/19292127)
IM 155-6 PN ST interface module (6ES7155-6AU01-0BN0)
Manual, 04/2017, A5E03576904-AE
Product overview
2.2 Functions
17