Siemens SIMATIC ET 200MP Manual page 16

Product overview
2.2 Functions
Prioritized startup
Prioritized startup denotes the PROFINET functionality for accelerating the startup of IO
devices operated in a PROFINET IO system with RT communication.
The function reduces the time that the correspondingly configured IO devices require to
return to the cyclic user data exchange in the following cases:
● After the supply voltage has returned
● After a station has returned
● After activation of IO devices
Note
Dependency on the startup time
The startup time depends on the number and type of modules. You can optimize the
startup time by
• inserting no more than 12 I/O modules
• inserting no power supply module.
The prioritized startup function with the requirements listed in the note above is not available
for IRT communication and media redundancy.
You can find additional information in the STEP 7 online help and
● as of STEP 7 V12, in the PROFINET with STEP 7 V14
(https://support.industry.siemens.com/cs/ww/en/view/49948856) function manual.
● as of STEP 7 V5.5 in the PROFINET System Description
(http://support.automation.siemens.com/WW/view/en/19292127) manual.
Cabling with fixed connection setting
If you set a fixed connection setting of the port in STEP 7, you should also deactivate
"Autonegotiation/Autocrossover".
You can find additional information in the STEP 7 online help and
● as of STEP 7 V12, in the PROFINET with STEP 7 V14
(https://support.industry.siemens.com/cs/ww/en/view/49948856) function manual.
● as of STEP 7 V5.5 in the PROFINET System Description
(http://support.automation.siemens.com/WW/view/en/19292127) manual.
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Interface module IM 155-5 PN ST (6ES7155-5AA01-0AB0)
Manual, 11/2017, A5E03612323-AC