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10/2021 · User Manual Version 1.0 · valid from firmware version 3.1.22
5
WEBLOG 250
2.3.2 LEDs in the terminal area
M-BUS
ON
MASTER
SLAVE
MAX
SHORT
green
green
yellow
orange
red
There are five LEDs in the upper middle of the terminal area showing the present status of the M-Bus. The
individual LEDs have the following meaning (if lighted):
ON the M-Bus output voltage is switched on
MASTER the Master transmits data
SLAVE at least one meter replies with data
MAX the maximum number of connectable meters has been exceeded (warning current)
SHORT M-Bus overcurrent / short circuit (LED flashes twice per second)
2.4 RESET button and acoustic signal generator
In the unlikely event that the WebLog is operable neither by touchscreen nor
by web browser, the user can initiate a restart of the system by pushing the
RESET button in the upper left corner of the terminal area. If there are still
problems with the firmware of the WebLog, resulting for example from a
corrupted operating system or application program in the FLASH memory.
You can press the RESET button several times to start a minimum so-called
RESCUE operating system. This system permits programming the FLASH
memory with a firmware image file from a USB memory stick.
The flashing procedure will be detailed described in chapter 4.1.10.
The piezo buzzer below the RESET button in the terminal area emits a short beep after a click on a button
of the touchscreen.