Siemens SIMATIC PN/BACnet LINK - Page 78

Diagnostics
10.1 Status LEDs
PN/BACnet LINK
78 Operating Instructions, 10/2017, A5E39895543-AA
RUN LED
ERROR
LED
MAINT
LED
1)
Operating
state
Description
On On On
Power-up test / Seri-
ous error
• For approximately 1 second: LED
test during startup
• Longer than 1 second: HW error
detected during power-up test or
other serious error
Off Off Off
System run-up
• System not completely booted yet
but power-up test is complete.
Flashes
Off Off
Not connected to S7
controller
• No "IO controller" connection estab-
lished or
• configuration not yet completed.
On
x
Off
Connected to S7
controller
• "IO controller" connection estab-
lished and configuration completed.
x
Flashes
Off
Error state
• "IO controller" connection estab-
lished and configuration completed,
but an error occurred:
– Diagnostic message to the S7
controller is pending or
– Incorrect configuration by the S7
controller
Flashes for at least 3 seconds.
Flashes
Off Off
Firmware update
• While the firmware is written to the
flash memory.
Flashes Flashes
Off
LEDs are flashing
(triggered by
TIA Portal)
• 3-second intervals
• For identification of the device
1) The MAINT LED currently has no meaning.
x: LED state is irrelevant
During boot-up of the PN/BACnet LINK and after connecting the power supply, the sequence
is as follows:
1. The three LEDs light up briefly for about 1 second and then go dark again.
2. None of the LEDs light up for about 4 seconds.
3. The RUN LED starts flashing.
4. When the run-up of the PN/BACnet LINK is successfully complete and the connection to
the S7 controller is established, the RUN LED lights up.