Siemens S7-400 - Page 39

LEDs
CP 443-1 Advanced
Equipment Manual, 03/2023, C79000-G8976-C256-07
39
INTF
(red)
EXTF
(red)
BUSxF
(red)
*)
RUN
(green)
STOP
(yellow)
MAINT
(yellow)
CP operating mode
-
• The gigabit interface is networked in STEP 7
but no Ethernet cable is connected.
or
• A duplicate IP address was detected after the
CP was in RUN.
or
• Difference in the transmission medium or
the duplex settings between the
configuration and the actual system
Loading using the Firmware Loader is active.
Note: does not apply to loading via the update
center in Web diagnostics.
The firmware download was aborted.
(STOP LED and RUN LED flash alternately)
Firmware activation after loading using the
Firmware Loader is active.
(does not apply to loading via the update center
in Web diagnostics)
- Module fault / system error
*
)
The behavior applies to BUS1F and BUS2F if there is no restriction listed in the "CP mode"
column.
**
)
See also the section Unused PROFINET interface without BUS2F indicator (Page 63).
The "MAINT" LED (yellow)
Note
When the "MAINT" LED lights up, important error messages and/or diagnostics interrupts have
occurred. The CP continues in RUN mode.
Check the entries in the diagnostics buffer of the device.