RUN/STOP LED ERROR LED MAINT LED Meaning
LED flashes yellow
LED off LED off
CPU performs internal activities during STOP, e.g.
ramp-up after STOP.
Downloading the user program from the SIMATIC
Memory Card
LED flashes
yellow/green
LED off LED off
Startup (transition from RUN → STOP)
LED flashes
yellow/green
LED flashes red LED flashes yellow
Startup (booting the CPU)
Test the LEDs during startup, insert a module.
LED flash test
Meaning of the RDY, COM, DIAG and SD Activity PPU LEDs
Name Function Status Meaning
RDY Ready
LED lights up red
There is at least one fault (e.g. RESET, watchdog monitoring etc.)
or the PPU is ramping up.
LED flashes red (2 Hz)
Not assigned (SINAMICS boot error).
LED lights up yellow
Ramping up the PPU.
LED flashes yellow
(0.5 Hz)
Firmware update of the connected DRIVE-CLiQ components
LED flashes yellow (2 Hz)
Firmware update is complete for components. Wait for POWER ON
for the components in question.
LED lights up green
NC ramped up and everything in cyclic mode
LED flashes
green/orange or
red/orange (1 Hz)
LED-supported detection of connected DRIVE-CLiQ component is
activated: (p0124[0] = 1).
System characteristics
3.2 Operator controls and display elements
PPU 1740
Equipment Manual, 01/2019, A5E47615272B AA 29
To Next Page
Loading...
