Siemens SINUMERIK 840D sl Commissioning Manual page 806

System settings
1.4 Displays during system booting
Booting the basic system
7-segment display
1 (begin)
2 (prepfs)
3 (hostname, loopback)
4 (syslog)
5 (network)
6 (NCU:rtai, TCU:tcuconfig) Starting the time server (ntpd)
7 (lsh)
8 (NCU:ftpd, TCU:mtouch)
9 (NCU:tcuservices,
TCU:usbexport)
NRK/NCK outputs
7-segment
display
10
Meaning
1 Not applicable.
2 Not applicable.
3 Debugger was initialized.
4 NRK operating system was successfully activated.
5 NRK operating system has booted, init task is being processed (→ the application
boots).
6 Initialization was successfully performed; the control is in cyclic operation.
with flashing point: The control is in cyclic operation and the cycles are active.
6.
F Internal error: Can only be read via additional diagnostics.
1 or 2 CompactFlash Card and SRAM data do not match. To resolve this problem, a
general reset is required by booting with switch position 1 or 2.
Lxx=yyy Internal error when starting NCK, "xx" is the line number in the mcsystem.ini, "yyy"
is a unique error code for the code position.
Meaning
Basis initializations
Cleaning up and preparing the file system
The name is set and the loopback interface configured.
Starting the system logging
Starting the CFS class 1, provide the network interfaces.
Initializing the network interfaces and the firewall
Starting the SSH server (if required, generate a host key if still not
available).
Starting the FTP server
Starting the TCU services (TFTP, VNC)
Commissioning Manual, 03/2013, 6FC5397-1DP40-3BA1
NCU operating system (IM7)