Overview
1.2 Design of the devices
SIMATIC IPC127E
Operating Instructions, 01/2019, A5E44296915-AA
13
1.2.3
Status displays of the devices
LED
State
Description
PC ON/WD
Off
-
Green
BIOS ready to boot
Flashing green/yellow (4 Hz) BIOS in POST (Power On Self Test)
Yellow
Idle state
Flashing red (4 Hz)
Watchdog status display: active
L1 RUN/STOP
Off
-
Green
Can be controlled by user program / control
program
Yellow
L2 ERROR
Off
-
Red
Can be controlled by user program / control
program
Yellow
L3 MAINT
Off
-
Yellow
Can be controlled by user program / control
program
Red
Example programs for controlling the LEDs on Windows operating systems are available on
the Customer Support page of Siemens Industry Automation and Drive Technologies.