Configuring Prioritized Startup - Siemens SIMATIC ET 200AL System Manual

Functions
5.12 Accelerating startup
5.12.3

Configuring prioritized startup

Requirements
You can enable the "Prioritized startup" PROFINET function for the IO devices (distributed
I/O) only in the following cases:
● The IO controller used can prioritize selected IO devices during startup.
● The IO device used supports prioritization.
Procedure
1. Select the IO device in the network view or device view for which you wish to accelerate
startup.
2. Open the IO device properties in the Inspector window.
3. Select "PROFINET interface > Advanced options > Interface options".
4. Select the "Prioritized startup" check box.
Figure 5-97
5. Download the configuration to the IO controller.
Note
Prioritized startup after a startup for the first time
A prioritized startup of the IO device is always available to you after the first configuration
of this IO device in the very first startup of the PROFINET IO system. Even in the case of
spare parts or a reset to factory settings, the first startup is a standard startup for the
respective configured IO devices.
Note
Number of IO devices (distributed I/O) with prioritized startup
You can only start up a maximum number of IO devices with the "Prioritized startup"
PROFINET functionality within one PROFINET IO system. This maximum number
depends on the IO controller used.
254
Configuring prioritized startup in STEP 7
PROFINET with STEP 7 V15
Function Manual, 12/2017, A5E03444486-AH