Siemens SINUMERIK ONE PPU 1740 Series Equipment Manual page 29

RUN/STOP LED
LED flashes yellow
LED flashes
yellow/green
LED flashes
yellow/green
Meaning of the RDY, COM, DIAG and SD Activity PPU LEDs
Name Function
RDY Ready
PPU 1740
Equipment Manual, 01/2019, A5E47615272B AA
ERROR LED
LED off
LED off
LED flashes red LED flashes yellow
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)
3.2 Operator controls and display elements
MAINT LED
CPU performs internal activities during STOP, e.g.
ramp-up after STOP.
LED off
Downloading the user program from the SIMATIC
Memory Card
Startup (transition from RUN → STOP)
LED off
Startup (booting the CPU)
Test the LEDs during startup, insert a module.
LED flash test
Meaning
There is at least one fault (e.g. RESET, watchdog monitoring etc.)
or the PPU is ramping up.
Not assigned (SINAMICS boot error).
Ramping up the PPU.
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).
System characteristics
Meaning
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