Siemens SIMATIC S7-1200 CP 1243-8 IRC Operating Instructions Manual page 42

LEDs and connectors
2.2 LEDs
Display of the operating and communications statuses
The LEDs indicate the operating and communications status of the module according to the
following scheme:
Table 2- 5 Display of the operating and communications statuses
DIAG LINK
(red / green) (red / green)
Module startup (STOP → RUN) or error statuses
red green
-
flashing red
-
green
-
red
-
flashing red
-
flashing red
-
flashing red
-
flashing red
Connection to Industrial Ethernet, status of the CPU
-
green
-
flashing green
-
-
flashing red
Connections via Ethernet
42
CONNECT VPN
ETH
(green)
(green)
- -
-
- -
-
-
-
- -
- -
- -
- -
CONNECT Meaning
RS232
(if more than one point listed: alternative
(green) meaning)
Power OFF
Startup - phase 1
Startup - phase 2
- Running (RUN) without serious error
- Invalid STEP 7 project data
- Missing STEP 7 project data
Backplane bus error with configured Ether-
net connections
Backplane bus error with configured connec-
tions via the serial interface
Backplane bus error with configured connec-
tions via the Ethernet and the serial interface
- Connection to Industrial Ethernet exists
CPU in RUN.
- Connection to Industrial Ethernet exists
CPU in STOP
- No connection to Industrial Ethernet
- Duplicate IP address detected in the Ether-
net network
Operating Instructions, 02/2018, C79000-G8976-C385-03
CP 1243-8 IRC