5 Performance Data / Operation
B−29
CP 443-1 for Industrial Ethernet / Manual Part B
Release 07/2010
C79000-G8976-C223−06
5.5.2 How PROFINET IO devices start up with a large operational
configuration
When operating the module with a large configuration (up to 128 communication
connections and up to 128 PROFINET IO devices), it may take several minutes
when the station starts up before all PROFINET IO devices have received
configuration data from the PROFINET IO controller. The IE/PB Link PN IO
operating as a PROFINET IO device is particularly affected by this.
To ensure that the CPU does not interrupt the distribution of project engineering
data in this situation, the parameter assignment monitoring time must be increased
on the CPU.
Possible remedy: Reduce the size of the configuration (for example, distribution on
several CPs).
5.5.3 Reduce the communication allocation reserved for
PROFINET IO when operating alongside other services.
If cyclic data exchange over PROFINET IO is operating at the same time on the
same Ethernet subnet, set the parameter “Communication component for
PROFINET IO“ in the properties dialog of the PROFINET IO system to a value
<100%.
Reason: At the (default) setting 100%, the communication time is reserved
primarily for PROFINET IO data exchange. Reducing the communication
component for PROFINET IO increases the system-wide update time for
PROFINET IO and creates additional time on the CP for processing other
communication services.
5.6 Characteristic data of TCP connections for HTTP
Each HTTP session occupies up to 4 TCP connections as soon as you use one or
more Web browsers to display data of the CP.
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