Port Configuration With Redundant Partners; Profinet Io Mode; How Profinet Io Devices Start Up In A Large Configuration - Siemens SIMATIC NET S7-400 Manual

Configuration and operation

6.7 PROFINET IO mode

Behavior during operation (CP in RUN)
If the CP detects double addressing on the network (new node with an IP address that has
already been assigned), a message is generated in the diagnostics buffer and the bus fault
LED lights up.
To acknowledge the bus fault LED in RUN mode, set the CP to STOP and then restart it.
After the device with the duplicate IP address has been removed from the network, the bus
fault LED goes off automatically.
Behavior when the CP starts up
If duplicate addressing is detected when the CP starts up, the CP remains in STOP. The bus
fault LED is lit and a diagnostics buffer entry is generated. The CP only starts up after the
duplicate addressing problem has been eliminated.
6.6.3

Port configuration with redundant partners

Using the same port number with redundant partners
As of firmware version V3.2 of the CP, when configuring passive TCP connections between
the CP and a redundant partner, you can configure the local port number of the CP
identically twice.
This is, for example, necessary if the partner is a redundant IEC master.
6.7 PROFINET IO mode
6.7.1

How PROFINET IO devices start up in a large configuration

When operating the module with a large configuration (up to 128 communications
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 remedies: Reduce the size of the configuration (for example, distribution on several
CPs).
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CP 443-1 (EX30)
Manual, 03/2019, C79000-G8976-C255-05