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7-segment display
Basic system run-up
7-segment display
NRK/NCK run-up
7-segment display
Operation
7-segment display
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 different settings:
NCU 1750
Equipment Manual, 01/2022, A5E45627807B AE
Meaning
04
Before loading the kernel
05
Before starting the kernel
Meaning
1
Basic initializations
2
Cleaning up and preparing the file system
3
The name is set and the loopback interface configured.
4
Starting the system logging
Starting the CFS class 1, provide the network interfaces.
5
Initializing the network interfaces and the firewall
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.
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).
1 or 2
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.
Meaning
6.
With flashing dot: The control is in cyclic operation and the cycles are active.
4.4 Operator control and display elements
Description
39
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