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

Error
The MCP/EKS cannot be accessed as network participant. There is a physical network connection to the system network.
18.11.2.3

HMI on the PCU cannot establish a network connection to the NC

Error
HMI displays alarm 120202
"Wait for connection to
NC/PLC" and/or no values
(only '#').
Error
HMI displays alarm 120202
"Wait for connection to
NC/PLC" and/or no values
(only '#').
SINUMERIK Operate (IM9)
Commissioning Manual, 03/2013, 6FC5397-1DP40-3BA1
Possible error causes and remedies
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.
Error cause 1
The IP address of the target NCK/PLC
set on the PCU is incorrect.
Error cause 2.1
The PCU has an IP address that does not
belong to the network or has an invalid IP
address.
The TCU support is deactivated on the PCU
(= DHCP is disabled) and the PCU either
operates with a permanently set IP address
that does not belong to the network, or with
the standard Windows DHCP client to
dynamically retrieve addresses. This is a
configuration error.
Service and diagnostics
18.11 Station-related network diagnostics
Remedy
From the HMI, correct the target address for
NCK/PLC and restart the PCU.
Remedy
Correctly set the network settings for the
system network in the Windows service
mode (set the fixed specified IP address and
subnet mask for the system network, use the
addressing mode, fixed IP address).
Execute the following actions using the
"System Network Center" program:
Connect the DHCP service to the
•
interface for the system network
Set the DHCP mode (TCU support,
•
DHCP SyncMode, address range of the
addresses that can be assigned)
Initiate DHCP clear
•
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