4.5.3 Meaning of LEDs on the USB modem
LED on the USB
modem
Meaning
Power LED lit
green.
The USB modem is connected to the USB port of the PC.
The operating system of your PC is in normal state.
Power LED ashes
green.
The temperature transmitter is assigned parameters.
Power LED is not lit. This PC is in the standby or idle state.
Comm LED is lit yel‐
low.
The USB modem is restarted.
Comm LED ashes
yellow.
Data transfer from the PC to the USB modem.
Error LED is lit red. Modem-internal errors (RAM errors) or a short-circuit at the modem terminals to the temperature trans‐
former was detected during the parameter assignment operation.
All LEDs are not lit
up.
The rmware of the USB modem is being updated.
All LEDs light up for
3 s.
The rmware of the USB modem was successfully updated.
See also
Troubleshooting of USB modem (Page 192)
Description
4.5 USB modem and SIPROM T
SITRANS TH100/TH320/TH420/TR320/TR420/TF320/TF420 with 4 to 20 mA/HART
Operating Instructions, 05/2020, A5E41864807-AB 59
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