Siemens SINUMERIK 840DE sl Commissioning Manual page 398

Configuring the network
17.6 Station-related network diagnostics
Procedure
17.6.2.2 MCP/EKS as network participant cannot be accessed
Error
The MCP/EKS cannot be accessed as network participant.
The MCP/EKS cannot be accessed as network participant. There is a physical network connection to the system network.
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1. The "TCP/IP Diagnostics" window opens.
2. Position the cursor on the component that is marked as having an
error (NCU).
3. Press the "Error analysis" softkey.
The corresponding error message is displayed.
Possible error causes and remedies
Error cause 1
There is no physical network connection.
Notice: The display only refers to the circumstance that the direct connection from MCP/EKS
to the next connection nodes has not been established, i.e.
● The Ethernet cable is not directly inserted at the MCP/EKS,
● The Ethernet cable is not inserted at the direct connection partner or the partner is not
available (e.g. MCP),
● The Ethernet cable connected to the MCP/EKS is defective.
Remedy
Establish the physical network connection (check the plug-in connections, replace the cable,
check the connection partner).
Error cause 2
The physical network connection does not exist after the next connection node to the system
network. There is no physical connection from the MCP/ECS to the computer with the active
DHCP server. The cables are either defective, have not been inserted or switches have not
been closed. Switches can also be located on the MCP or distribution box.
Remedy
Establish the physical network connection (check the plug-in connections, replace the cable,
check the connection partner).
Once the connection has been established, the TCU continues to boot.
Cause of the error
No active DHCP server is found in the system network. Possible causes:
● Only a single computer has been configured in the system network with active DHCP server
- and this computer is not available. The system network is not operated with synchronizing
DHCP servers.
● No computer has been configured in the system network with active DHCP server. DHCP
operation is disabled on all potential computers (NCU, PCU). This is a configuration error.
● In the system network, there is no NCU or PCU computer available that has DHCP operation
activated on it and could be a server.
Remedy
In the system network, configure a computer that is available as DHCP server.
Commissioning Manual, 12/2017, 6FC5397-1DP40-6BA1
SINUMERIK Operate (IM9)