Microtronics myDatalogNANO Ex, Руководство пользователя

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Chapter 5 Functional principle
The internal data memory of the myDatalogNANO Ex is designed as a circular buffer with 4 sectors. If
the maximum number of data records (26.360 ) is achieved, the sector with the oldest data is
deleted fully before new data can be saved in this sector again. This means that the internal data
memory at the very least contains the measurement values of the last 19770 cycles, however at
most the measurement values of the last 26.360 cycles.
For this reason, it is recommended to coordinate the transmission cycle and record interval in such a
way that a maximum of 19770 measurement cycles have to be recorded between two transmissions.
Please note, that if the measurement cycle is shorter than the record interval, the record interval still
has to be used for the calculation. In this case, the reason for this is that although the measurement
is completed in the measurement cycle, the determined data is saved in the data memory in the
record interval. If it can be expected that individual transmissions fail due to poor network coverage
or the measure quick divisor is activated via the trigger, this must also be taken into consideration
when calculating the measurement cycles that are to be saved.
Note:
Additional explanation regarding the functionality of the circular buffer
Data memory after the first measurement cycle:
Data memory after 26.360 measurement cycles:
Data memory after 26.360 +1 measurement cycles:
5.3 Procedure in case of connection aborts
If the connection is terminated, another attempt to establish a connection is made after 2min for all
connections, except for ones that were established by initiating ALOHA transmission mode. The
connection is attempted up to 3 times, as long as the previous attempt to establish a connection
was successful. This means that if the connection fails and it is not possible to re-establish the
connection during the first retry after 2min , a further retry will not be completed after 2min .
This process also applies if the connection is terminated during online mode.
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