Meaning Of Switch Positions - Siemens SINUMERIK 840D sl Commissioning Manual

Commissioning a System

1.4 Meaning of switch positions

System error
RDY LED:
Other LEDs:
Meaning:
RDY LED:
Other LEDs:
Meaning:
1.4 Meaning of switch positions
Overview
The NCU has two twist buttons in the lower section of the front panel.
● NCK start-up switch with label SIM/NCK
● PLC mode selector switch with label PLC
The switch positions are marked with even numbers or letters; the uneven numbers are
represented by dots due to space limitations.
Figure 1-1
8
Rapidly flashing red (2Hz)
Set by PLC/option module
An error has occurred.
The system is stopped.
Rapidly flashing red/yellow (2Hz)
Set by PLC/option module
An error has occurred.
The system has continued running - although with restricted
functions.
Startup and mode selector switch
NCU Operating System (IM7)
Commissioning Manual, 07/2007, 6FC5397-1DP10-2BA0