Siemens SINUMERIK ONE NCU 1740 Equipment Manual page 38

Description
4.4 Operator control and display elements
Meaning of the RDY, COM, DIAG and SD Activity NCU LEDs
Name Function
RDY Ready
COM Communi‐
cation
38
Status
LED lights up red
LED flashes red (2 Hz)
LED lights up yellow
LED flashes yellow
(0.5 Hz)
LED flashes yellow (2 Hz)
LED lights up green
LED flashes
green/orange or
red/orange (1 Hz)
LED off
LED lights up green
LED flashes green
LED lights up yellow
LED flashes yellow
LED flashes red
Meaning
There is at least one fault (e.g. RESET, watchdog monitoring etc.) or
the NCU is ramping up.
Not assigned (SINAMICS boot error).
Ramping up the NCU.
Firmware update of the connected DRIVE-CLiQ components
Firmware update is complete for components. Wait for POWER ON
for the components in question.
NC ramped up and everything in cyclic mode
LED-supported detection of connected DRIVE-CLiQ component is
activated: (p0124[0] = 1).
CP not ramped up / started
Communication via CP possible (RUN operating state)
Communication possible (no configuration)
CP was stopped via PLC/TIA. No communication.
Configuration received and transition to the RUN operating state.
Error status (FATAL error)
Equipment Manual, 09/2022, A5E51087503B AC
NCU 1740