Inconsistent Connections - Connections Without Assignment - Siemens S7-300 Configuration Manual

Configuring communications connections

5.3 Inconsistent connections - connections without assignment

For further information, refer to the sections dealing with specific connections.
Note
To check how many connections are possible per Ethernet CP, please refer to the manual
that ships with the CP /1/ (Page 227).
If several CPs are installed in a station, there is an automatic switchover to the next CP if this
limit is exceeded. The connections can be routed in the Properties dialog of the connection.
Security enabled
To be able to establish the connection to unspecified nodes, you must first configure suitable
firewall rules in the advanced mode of SCT.
For specified connections, the firewall rules are created automatically.
5.3 Inconsistent connections - connections without assignment
An inconsistent connection is one in which the connection data is incomplete or inconsistent;
the connection is not functional in the context with the project.
Inconsistent connections cannot be loaded - operation is not possible with such connections.
Possible causes for inconsistent connections
● Deletion or change of the hardware configuration.
● Missing interface network links in the project, which are necessary for a connection.
● Connection resources are exceeded
● Connections to an unspecified connection partner without partner address information.
You will find detailed information about the cause of the inconsistency in STEP 7.
Examples of and remedies for inconsistencies associated with typical configuration actions
Actions are explained below that can cause configured connections to lose their assignment
or be deleted.
Note
ID adaptation in the user program
Note that as opposed to the S7 connections, a CP-dependent ID is assigned to the
connections of the SEND/RECEIVE interface. Consequently the actions described below
may require customizing of the ID, which means that the interface must also be customized
in the user program.
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Configuring and commissioning S7 CPs for Industrial Ethernet
Configuration Manual, 09/2013, C79000-G8976-C182-13