The "sc enable" and "sc disable" commands function by changing certain variables in the /user/
system/etc/basesys.ini file. The associated variable is "DisableSubsystems" or
"DisableDHCPD<INTERFACE>" for subsystems and DHCPSvr, respectively.
With "sc enable usb" USB storage devices on permanently disabled USB interfaces or on
certain host names or IP addresses are enabled again.
DHCP synchronization
The synchronization of the DHCP server is switched on and off with "DHCPSync". The
synchronization is only possible in the system network (X120). A priority can also be specified:
-LOW, -HIGH or -MASTER.
The priorities have the following effect for the synchronization of the DHCP server:
● MASTER: The computer node becomes an active DHCP server. If several servers have
been configured in the system network, this computer has the highest priority.
● HIGH: The computer node belongs to the server candidates with high priority, i.e. if no
server with "MASTER" priority becomes active, then a computer with "HIGH" priority can
be the active server.
● LOW: The computer node belongs to the server candidates with low priority, i.e. if no server
with "MASTER" priority or "HIGH" priority becomes active, then a computer with "LOW"
priority can be the active server.
Note
Recommended settings are:
● DHCP operation and DHCP synchronization are switched on in the system network.
● Exactly one NCU is set as DHCP server.
● A maximum of two computers are candidates with "HIGH" priority.
● All other components are set as DHCP clients or candidates with "LOW" priority.
See also
"SyncModeDHCPD_SysNet" parameter in the "basesys.ini" file.
2.5.10 ntpdiag (diagnostics)
Description
Syntax: sc ntpdiag
Alternative names: ---
Authorization level: None
Using command "sc ntpdiag" , a list of the configured time servers and their status is output.
In addition, for the time server, which the NCU uses, information such as IP address, stratum
(distance to a time character receiver, e.g. an atomic clock) and the offset between the NTP
Configuring the system
2.5 Description of the actions
NCU operating system
50 Commissioning Manual, 12/2017, 6FC5397-1DP40-6BA1
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