Siemens CP 343-1 Manual page 33

The "MAINT" LED
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.
LEDs for displaying the CP communications status
In addition to the LEDs that signal the CP state, the following LEDs provide information
about the status of the CP interface to Industrial Ethernet.
Table 4- 2
LED
RX/TX (green)
X1P1 / X1P2
(green / yellow)
Module identification (PROFINET interface)
Note
Module identification - make the port LEDs flash briefly
With the help of Web diagnostics or the online functions of STEP 7, you can search for and
identify the module in the rack. The options for this are as follows:
• In Web diagnostics
You click the "Flash" button in the update center.
• In STEP 7
You click the "Flash" button in the "Browse network" dialog
If you click the "Identify" or "Flash" buttons, all the port LEDs of the PROFINET interface
flash briefly.
CP 343-1
Manual, 12/2018, C79000−G8976−C201-08
LEDs: RX/TX, X1P1, X1P2
Display Meaning
The CP is sending/receiving over Industrial Ethernet.
Note:
PROFINET IO services are not signaled here.
Port has no connection to Industrial Ethernet.
Existing connection via port to Industrial Ethernet (LINK
status)
LED flashes yellow (constant light green):
Port sending / receiving over Industrial Ethernet or
PROFINET IO.
Note:
All received / sent frames are signaled for each specific port
including those simply forwarded by the switch.
There is permanent data transfer at the port via Industrial
Ethernet (e.g. PROFINET IO).
LEDs
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