7-segment display Meaning
04 Before loading the kernel
05 Before starting the kernel
Basic system run-up
7-segment display Meaning
1 Basic initializations
2 Cleaning up and preparing the le system
3 The name is set and the loopback interface congured.
4 Starting the system logging
Starting the CFS class 1, provide the network interfaces.
5 Initializing the network interfaces and the rewall
6 Starting the time server (ntpd)
7 Starting the SSH server (generate a host key if one is still not available).
8 Starting the FTP server
9 Starting the TCU services (TFTP, VNC)
P Partitioned: The system performs a partitioning operation.
NRK/NCK run-up
7-segment display 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 (→ application
run-up).
1or2 SD Card and NVRAM data do not match. To resolve this problem, a general
reset is required by booting with switch position 1 or 2.
Operation
7-segment display Meaning
6. With ashing dot: The control is in cyclic operation and the cycles are active.
4.4.4 Start-up and mode selector switch
The NCU is equipped with an NCK rotary coding switch and a PLC mode switch in the form of a
toggle switch with three dierent settings:
Description
4.4Operator control and display elements
NCU 1750
40 Equipment Manual, 10/2023, A5E45627807B AH
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