Siemens IM 155-6 PN ST - Prioritized Startup Functionality; Device Replacement Procedures

Product overview
2.2 Functions
IM 155-6 PN ST interface module (6ES7155-6AU01-0BN0)
16 Manual, 04/2017, A5E03576904-AE
Prioritized startup
Prioritized startup describes the PROFINET IO functionality for accelerating the startup of IO
devices in a PROFINET IO system with IRT and RT communication.
The function reduces the time that the appropriately configured IO devices require in order to
return to cyclic user data exchange in the following cases:
● After the supply voltage has returned
● After a station has returned
● After IO devices have been activated
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 system manual PROFINET System Description
(http://support.automation.siemens.com/WW/view/en/19292127)
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.
Storing the name on the BusAdapter and the interface module produces a range of
scenarios for using the device name when the interface module is replaced.
Table 2- 2 Scenarios for using the device name
Interface module empty
Interface module with device
name
BusAdapter empty
No device name available The device name from the inter-
face module is used and copied
to the BusAdapter.
BusAdapter with device name
The device name from the
BusAdapter is used and copied
to the interface module.
The device name from the
BusAdapter is used and copied
to the interface module if this
has a different device name.