Configuring the Ethernet CP with STEP 7
3.6 Assigning addresses the first time
Configuring and commissioning S7 CPs for Industrial Ethernet
76 Configuration Manual, 09/2013, C79000-G8976-C182-13
Enable the "Diagnostic interrupts" option, if you want diagnostic interrupts relating to the
MRP status on the local CPU to be output.
The following diagnostic interrupts can be generated:
● Wiring or port error
Diagnostic interrupts are generated if the following errors occur at the ring ports:
– Connection abort on a ring port
– A neighbor of the ring port does not support MRP.
– A ring port is connected to a non-ring port.
– A ring port is connected to the ring port of another MRP domain.
● Interruption / return (redundancy manager only)
If the ring is interrupted and when the original configuration returns, diagnostic interrupts
are generated.
The occurrence of both interrupts within 0.2 seconds indicates an interruption in the ring.
Parameter assignment of the redundancy is not set by STEP 7 (redundancy alternatives)
This option only affects switches. Select this option if you want to set the properties for
media redundancy using alternative mechanism or tools such as Web based Management
(WBM), CLI or SNMP.
If you enable this option, existing redundancy settings from WBM, CLI or SNMP, are retained
and are not overwritten. The parameters in the "MRP configuration" box are then reset and
grayed out. The entries then have no meaning.
Assigning addresses the first time
Meaning of the address assignment - MAC address and IP address
Depending on the device type, the CP ships with one or two fixed MAC addresses. Without
further configuration, the device can only be reached via the Ethernet connection using these
MAC addresses.
In this status "as shipped", you can already use the following functions via the CP with the
ISO protocol by using the default MAC address:
● Downloading the configuration to the CP or the CPU;
● Diagnostics of the CP or CPU.
Before you can download the configuration data to the device using an IP address, you must
first assign an IP address to the CP.
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