NOVUS V1.5x A - Manual (Page 15)

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FLAGS (LEDS)
Tx/Rx flags
They signal transmission and reception of data by the RS485/Modbus interface, regardless if
it is configured to operate in master or slave mode.
Status / USB flags
When connecting the equipment, both LEDs flash two times and remain off until all the
initialization has been completed.
The Status flag remains ON in normal condition. When it is logging, flashes 2 times at 3
second intervals. In error cases, this LED will be flashing 3 times at 8 second intervals.
In the error cases, please check if the clock of the FieldLogger has the correct date and
time. If they are wrong, probably the battery of the clock has run low and needs to be
replaced. If it is OK, try rebooting the machine by turning off its power supply and restarting it
after 10 seconds. If the LED continues to indicate an error, there may be something wrong
with your FieldLogger.
The USB flag remains ON only while a cable is connected in the USB device or while the
USB flash drive is plugged into the USB host interface. The following exceptions are:
• Download errors via USB flash drive: flash drive with insufficient writing space,
inability to write in the flash drive (write protected) or flash drive not compatible
(sector different from 512 bytes, for example), the USB LED flashes while the error
condition remains (typically, until the flash drive has been removed). Check the "USB
Interface" section in the chapter "FieldLogger Operation" for more details.
• At the end of the download, if everything is correct, the USB flag remains ON until the
flash drive has been removed from the equipment.