Siemens SIMATIC NET TeleControl S7-1200 CP 1243-1 Operating Instructions Manual page 24

LEDs and connectors
2.2 LEDs
DIAG - LINK
(red / green) (green)
flashing red
Connection to Industrial Ethernet
-
green
-
Connection to communications partners
green
green
flashing
green
flashing
green
Connection for online functions
green
green
-
green
VPN connection
green
- -
24
CONNECT VPN
(green) (green)
-
- -
- -
- -
-
-
-
-
- -
- -
- -
-
-
SERVICE Meaning
(green) (if more than one point listed: alternative
meaning)
- Backplane bus error
- Connection to Industrial Ethernet exists
-
Connection to Industrial Ethernet being
•
established.
IP address being obtained.
•
- No connection to Industrial Ethernet
- Connection established to at least one
partner
- Partner reachable, CPU in STOP mode
- Partner not reachable, CPU in RUN mode
- Partner not reachable, CPU in STOP mode
Connection for online functions established
Attempt to establish connection for online
functions
No connection to engineering station
- VPN connection configured on the CP
- No VPN connection configured on the CP
Operating Instructions, 12/2016, C79000-G8976-C365-02
CP 1243-1