NCK commissioning switch
Figure 4-6 NCK commissioning switch
Switch position NC operating mode
0 NCK normal run-up, setting in normal operation
1 General reset (NCK runs up with default values)
2 NCK runs up with the data that was saved at the last shutdown.
7 Debug mode (NCK is not started); the SSH port tcp/22 is open at X130
8 IP address for X130 of the NCU is displayed on the 7-segment display; the NCK is
not started; the PLC remains at STOP
9 SSH port tcp/22 is open at X130 (without any entry in le basesys.ini)
All others Not relevant
Note
Switch position when booting the service system
When booting the service system, it is not permissible that the rotary switch is in the "0" position,
as in the "0" position, the NCU always boots from the integrated memory and from the SD card.
PLC mode selector switch
RUN Places the PLC in the RUN operating state. Setting in normal operation.
STOP Places the PLC in the STOP operating state.
MRES Initiates the PLC reset.
Figure 4-7 PLC mode selector switch
Restoration of the factory settings when the PLC powers up
While the control system powers up the PLC can be restored to the initial delivery condition with
the toggle switch position MRES. When doing this, the PLC SD card is cleared and the remanent
data initialized. The PLC IP address assigned via the TIA Portal is also cleared.
Description
4.4 Operator control and display elements
NCU 1740
Equipment Manual, 10/2021, A5E51087503B AA 39
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