Siemens IM 155-6 PN ST Equipment Manual page 17

This function accelerates the startup of IO devices in the following cases:
• After recovery of supply voltage
• After station recovery
• After activation of IO devices
Note
Dependency of the startup time
The interface module permits startup times from 0.9 s.
The startup time depends on the number and type of modules.
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 PROFINET System Description
(http://support.automation.siemens.com/WW/view/en/19292127) system manual
Device replacement
Device replacement without topological configuration
The device name is also stored on the BusAdapter in addition to the interface module. A
device name saved on the BusAdapter is the requirement for device replacement without
topological configuration.
When the interface module is replaced, there is range of scenarios in which the device name
is used.
Table 2- 2
BusAdapter empty
BusAdapter with device name
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.
IM 155-6 PN ST interface module (6ES7155-6AU01-0BN0)
Equipment Manual, 10/2020, A5E03576904-AE
Scenarios for using the device name
Interface module empty
No device name available
The device name from the
BusAdapter is used and copied
to the interface module.
Product overview
2.2 Functions
Interface module with device
name
The device name from the inter-
face module is used and copied
to the BusAdapter.
The device name from the
BusAdapter is used and copied
to the interface module if this
has a different device name.
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