Siemens SIMATIC CFU Commissioning Manual page 109

LED displays on the interface dome of the Compact Field Unit
Table 9-2 Status and error display
LEDs
PWR RN
(supply) (operation)
On On
Off Off
ON ON
* *
(~2 Hz) (~2 Hz)
ON (~2 Hz)
ON (~1 Hz)
ON Flashes
Flashes Flashes
* *
* *
SIMATIC CFU
Commissioning Manual, 08/2019, A5E39252870-AD
ER/MT
(error/ main‐
tenance)
Off Good status: The CFU has established
a connection to the IO controller.
Off No or insufficient supply voltage.
Startup of the CFU (approx. 5 s)
ON
Maintenance required (after starting of
the CFU)
ON
Serious internal error.
All channel LEDs also flash.
(~2 Hz)
Unsupported BusAdapter
(~2 Hz)
Internal updates are running after a
firmware update (duration: approx. 30
(~1 Hz)
s).
* No connection to the CPU
Node flashing test
Flashes
Group fault and group fault channels.
Flashes
Configured structure does not agree
with the actual structure of the CFU .
Parameter assignment error for PRO‐
FIBUS PA or DIQ.
● Warning limits for fieldbus
connection exceeded
(~2 Hz)
● Service port enabled
Meaning
Diagnostics of the CFU
9.2 Diagnostics via LED displays
Solution
Check the supply voltage.
-
Evaluate the diagnostics and elimi‐
nate the error.
Check whether a firmware update is
available and carry out the update. If
the error persists, contact Siemens In‐
dustry Online Support.
Replace the BusAdapter.
Wait until the update has been com‐
pleted. The CFU subsequently starts
up automatically.
Wait a few seconds until the connec‐
tion is established.
If the connection is not established,
check the configuration (device name
and IP address of the CFU).
Check the LEDs on the BusAdapter
-
Evaluate the diagnostics and elimi‐
nate the error.
Check the structure of the CPU wheth‐
er a channel fault or an error at the
fieldbus exists.
Evaluate the display of the channels
and fieldbus connections in STEP 7
and eliminate the error.
Maintenance required
109