8 Further Notes on Operation
B−46
CP 443-1 for Industrial Ethernet / Manual Part B
Release 07/2010
C79000-G8976-C223−06
Prioritized startup is used in fast processes in which IO device are changed often,
for example for a fast change of tools on a robot.
The PROFINET “prioritized startup” functionality also achieves a significant
improvement in performance in applications in which a fast startup of the IO
devices is required following “Power on” or after station failure and station return or
when activating IO devices.
Configuration for IO devices
You configure prioritized startup for the IO devices configured in the PROFINET IO
system. To do this, go to STEP 7 / HW Config and select the properties dialogs of
the PROFINET interfaces for the relevant IO devices.
Prioritized startup required fixed port settings.
For more detailed information, refer to /16/ of the SIMATIC PROFINET system
description (see Chapter 12).
Note
After reconfiguring an IO device for prioritized startup, the first startup takes place
in the normal time without being prioritized. All subsequent startups will then be
completed in the reduced time.
Notice
Including an IO device with prioritized startup in a ring topology with media
redundancy serves no practical purpose since the ring is interrupted at each IO
device change.
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