1.4.5.1.4 State LEDs
The PROFINET state is shown by the state LEDs.
Table 59: Meaning of the diagnosis LEDs
LED Color State Description
PWR Green On Power supply available
Blinking ---
Off Power supply not available or defective
hardware
RDY Yellow On Boot procedure
Blinking Boot failure
Off ---
RUN Green On Communication module is operational
Blinking ---
Off Communication module is not operational
STA1 Red On Diagnosis alarm reported. At least one
device is having a diagnosis alarm. In
incorporation with STA2 PNIO: License
fault.
Blinking System error
Off No system error
STA2 Red On No connection; in incorporation with STA1
PNIO: license fault
Blinking Configuration fault: some configured I/O
modules are not connected
Off No bus error, communication is running
STA1 Yellow Blinking
(synchronously)
No production data available,
no bus communication possible.
STA2 Yellow
LED state
during
firmware
update
STA1 Green Blinking
(synchronously)
Firmware file transfers during
communication module firmware update.
STA2 Red
STA1 Green Blinking
(alternately)
Communication module writes the
firmware file to the internal flash.
Do not power off the PLC!
STA2 Red
The RJ45 Ethernet connector contains two LEDs showing the current Ethernet port connection
state.
Table 60: Meaning of the diagnosis LEDs
LED Color State Description
PNIO1 LED "Link" Green On Ethernet connection established
Off No Ethernet connection
PNIO1 LED "RX/TX" Yellow On ---
Blinking PROFINET device sends/receives
frames
Off ---
PNIO2 LED "Link" Green On Ethernet connection established
Communication modules (AC500 standard) > PROFINET
2022/01/31 3ADR010278, 3, en_US 119
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