Reset Button; 7-Segment Display - Siemens SINUMERIK 840D sl Manual

Additional references
● You can find a detailed description of LED states during power-up in the "NCU Operating
● For information on drive faults and alarms, see also:
5.4

RESET button

Arrangement
The RESET button is located behind the blanking cover.
Performing a reset operation
The reset operation resets the NCU and forces a new power-up. It is similar to a "Power On
Reset" except that the 24 V power supply does not have to be switched off.
5.5

7-segment display

Displaying messages
The 7-segment display is located behind the blanking plate of the Control Unit. It serves as a
status display during startup and performs the following tasks:
● Output of test and diagnostic messages.
● Output of status messages during booting
Critical messages
● During normal operation, "6" appears here and the dot flashes.
● An "8" indicates that the fan is defective or that the Control Unit is operating without a fan.
Additional references
CNC Commissioning Manual Part 1 (NCK, PLC, drive)
NCU
Manual, 03/2010, 6FC5397-0AP10-3BA0
System (IM7)" section of the Basesoftware and Operating Software Commissioning
Manual.
SINAMICS S120/S150 List Manual (LH1)
Operating and display elements
5.4 RESET button
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