Siemens S7-400 - Page 38

LEDs
CP 443-1 Advanced
38 Equipment Manual, 03/2023, C79000-G8976-C256-07
Table 4- 2 Meaning of the LED displays
INTF
(red)
EXTF
(red)
BUSxF
(red)
*)
RUN
(green)
STOP
(yellow)
MAINT
(yellow)
CP operating mode
-
Starting up (STOP->RUN)
• Temporary LED pattern during startup (a few
seconds)
• With permanent LED pattern:
Hardware fault in the CP
- Running (RUN)
- Stopping (RUN->STOP)
-
Stopped (STOP)
In STOP mode, configuring and performing
diagnostics on the CP remain possible.
-
STOP with internal error or memory reset.
(for example IP double addressing detected
during startup of the CP in network)
The cause can also be a bad C-PLUG (defective,
wrong C-PLUG type or not inserted).
The following applies in this status:
• The CPU or intelligent modules in the rack
remain accessible using PG functions (over
MPI or the ISO protocol).
• SNMP functionality and access over HTTP or
FTP are not possible.
-
-
-
-
• No link (on any port) **
)
or
• Double IP address detected during CP
operation.
- RUN with external error; one or more IO devices
are not obtainable. (only BUS2F)
-
• RUN with external error; Diagnostic interrupt
from one or more IO devices is pending. IO
device diagnostics will provide detailed
information.
or
• Event indication in conjunction with the MRP
function; The CP diagnostics buffer contains
detailed information.