Siemens SIMATIC NET S7-1200 - Page 21

LEDs and connectors
3.2 LEDs
CP 1243-1 DNP3, CP 1243-1 IEC
Operating Instructions, 02/2014, C79000-G8976-C312-02
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Display of the basic statuses of the CP ("DIAG" LED)
Table 3- 4 Display of the basic statuses of the CP
DIAG
(red / green)
Meaning
(if more than one point listed: alternative meaning)
Basic statuses of the CP
• Power OFF
• Incorrect startup
green
Running (RUN) without serious error
flashing green
• Partner not connected
• Firmware loaded successfully
flashing red
• Starting up
• Module fault
• Invalid STEP 7 project data
flashing red-green
Error loading firmware
Display of the operating and communications statuses
The LEDs indicate the operating and communications status of the module according to the
following scheme:
Table 3- 5 Display of the operating and communications statuses
DIAG
(red / green)
-
LINK
(green)
CONNECT
(green)
VPN
(green)
SERVICE
(green)
Meaning
(if more than one point listed: alternative
meaning)
•
Module startup (STOP → RUN)
•
Error/fault states
Power OFF
red
Startup - phase 1
flashing red
- Startup - phase 2
green
- - - - Running (RUN) without serious error
Incorrect startup
red
- - - Invalid STEP 7 project data