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
Device specifications
Communication modules (AC500 standard) > PROFINET
2022/01/31
3ADR010278, 3, en_US
119