Error Possible error causes and remedies
Connect the service PG to the NCU via X127. Log into Linux via WinSCP or Putty. Using the
service command 'sc show ip -eth0', display the actual settings - and check these. If the cause
of the error is confirmed, then the NCU must be reparameterized.
Perform the service commands and settings:
● sc enable DHCPSvr –X120 or the equivalent sc enable DHCPSvr –eth0 to activate DHCP
operation
● sc enable DHCPSync –X120 -LOW|HIGH|MASTER or equivalent sc enable DHCPSync
–eth0 -LOW|HIGH|MASTER to set the DHCP synchronization mode of this NCU
Enter the following entries correctly in the /user/system/etc/basesys.ini file
:[InternalInterface]
; With InternalIP and InternalNetMask (both must be set together),
; you can change the address on the internal/TCU/automation/system net.
InternalIP=192.168.214.1
InternalNetMask=255.255.255.0
…
; This is the range of dynamic IPs given out by the DHCP server
; Defaults should be sensible
InternalDynRangeStart=192.168.214.10
InternalDynRangeEnd=192.168.214.239
The values in green should be set corresponding to the overall system.
Then restart the NCU.
Error cause 3.2
The NCU has an IP address that does not match the network or has an invalid IP address.
The NCU participates in DHCP operation and the NCU is an active DHCP/DNS server (either
as a result of the DHCP SyncMode ON_MASTER or as a result of the Sync priority - just the
same as the other server candidates and random selection). The NCU is set with an incorrect
IP address and an incorrect IP range for the IP addresses that can be dynamically allocated.
The NCU possibly changed from DHCP standby to active server as the computer with DHCP
MASTER has failed/has been switched-off.
Remedy 3.2
The same as for remedy 3.1
Error cause 3.3
The NCU has an IP address that does not match the network or has an invalid IP address.
The NCU participates in DHCP operation and operates with the incorrect IP address. After
the NCU booted, an additional component that is already operational (NCU or PCU) with
active DHCP server was connected to the network. An additional active DHCP server was
switched into the system network while operational; this active DNCP server has an incorrect
address range. This is a configuration error.
Remedy 3.3
The same as for remedy 3.1
HMI displays alarm 120202 "Wait for connection to NC/PLC" and/or no values (only '#').
Error cause 4.1
The NCU has a valid IP address in the system network, however, not the required IP address.
The NCU does not participate in DHCP operation and operates with a permanently set target
address that is different from that saved in MMC.INI in the system network - however, this is
a valid address. This is a configuration error.
Remedy 4.1
Configuring the network
17.6 Station-related network diagnostics
SINUMERIK Operate (IM9)
Commissioning Manual, 12/2017, 6FC5397-1DP40-6BA1 387
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