Siemens SINUMERIK MCU1720, Руководство по эксплуатации оборудования

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RUN/STOP LED ERROR LED MAINT LED Meaning
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
Meanings of the HMI LEDs
LED Status Description
PC ON/WD Off -
Green BIOS ready to boot; PC is running
Flashing green/yellow
(1 Hz)
BIOS in POST, power switch on
Yellow Idle state
Flashing red (1 Hz) Watchdog status display: Active
RUN/STOP or L1 Off -
Green Can be controlled from the user program
Yellow Can be controlled from the control program
(e.g. WinAC)
ERROR or L2 Off -
Red -
Flashing red Can be controlled from the user program or the
control program (e.g. WinAC)
MAINT or L3 Off -
Yellow -
Red Can be controlled from the control program
(e.g. WinAC)
You can find program examples to control LEDs under the Windows operating systems at the
Customer Support page Industry Automation and Drive Technologies. ( https://
support.industry.siemens.com/cs/start?lc=en-WW )
Important LED states
● If all the LEDs are flashing, the PLC must be reset (general reset) via the mode selector
switch (ramp-up with the switch in the "MRES" position).
● While the MCU is powering up, all LEDs briefly light up orange. You can carry out a detailed
diagnosis using a PG/PC and the operating software.
Further information
You can find more information about LED states during ramp-up here:
● Commissioning Manual, Basic Software and Operating Software
You can find more information about the drive faults and alarms here:
● List manual (LH1) SINAMICS S120/S150
Description
4.2 Operator control and display elements
MCU 1720
Equipment Manual, 09/2019, A5E47437728B AB
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