Siemens Simatic RTU303xC Series Operating Instructions Manual page 109

The "Overview" tab
The "Overview" tab shows a picture of the RTU. When you are connected to the operating
RTU, the LED symbols shown in the WBM reflect the original status of the LEDs on the RTU.
If the extension board is activated, it is also displayed. The LEDs of the extension board
have the following meaning on the start page:
● When HART or Modbus is enabled, the respective HART or RS485 LED "TxD" flashes
green if at least one variable is configured and read in.
● When HART or Modbus is enabled, the respective HART or RS485 LED "RxD" flashes
green if at least one variable is configured and read in. If an error occurs while reading a
variable, the LED remains off.
● If HART and Modbus are activated and a communication error occurs with HART, the
"RxD" and "TxD" LEDs alternatingly flash for RS485 and only the "TxD" LED flashes for
HART.
Status LED
● If an error occurs (the "STATUS" LED is lit or flashes red) a message text is output in this
line.
Show diagnostics buffer
● You can jump directly to the page of the diagnostics buffer via the link and check the
diagnostics messages.
RTU303xC
Operating Instructions, 06/2019, C79000-G8976-C382-06
Configuration (WBM)
4.9 Start page
109