Tcu Cannot Establish A Network Connection To The Hmi - Siemens SINUMERIK 840D sl Commissioning Manual

Service and diagnostics
18.11 Station-related network diagnostics
18.11.2.4

TCU cannot establish a network connection to the HMI

Error
When booting, TCU signals 'ERROR: Network connection not established'.
When the TCU boots, it signals 'connection established – no DHCPServer available'.
When the TCU boots, it signals 'connection established – no DHCPServer available'. There is a physical network
connection to the system network.
After it has booted, the TCU displays 'Waiting for HMI'. (The TCU cannot establish its connection to the HMI.)
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Possible error causes and remedies
Cause of the error
There is no physical connection.
Notice: The display only refers to the situation where the direct connection of the TCU to the
next connection nodes has not been established, i.e.
The Ethernet cable is not directly inserted at the TCU,
•
The Ethernet cable is not inserted at the direct connection partner or the partner is not
•
available (e.g. MCP),
The Ethernet cable at the TCU is defective.
•
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
The physical network connection does not exist after the next connection node to the system
network. There is no physical connection from the TCU 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 error causes include:
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.
Error cause 1
The connection to the HMI has not been established - neither the connection configured in
config.ini nor the default connection. An incorrect address for the HMI connection after booting
has been set in the config.ini file.
Commissioning Manual, 03/2013, 6FC5397-1DP40-3BA1
SINUMERIK Operate (IM9)