Data log
IDEC SmartRelay Manual
252
Note
IDEC SmartRelay provides a 1024-byte buffer for data logging. If the data in this buffer
reaches 512 bytes, IDEC SmartRelay automatically writes data to the micro SD card
inserted in the card slot. If the speed of data generation in IDEC SmartRelay is faster than
that of data writing to the micro SD card, data loss can occur. To avoid the occurrence of
data loss, apply an enable signal to the data log function block at a minimum time interval
of 500 ms. If, however, no micro SD card is inserted in the card slot, the buffer area in
IDEC SmartRelay can only store 512 bytes of data log and the left data log gets lost.
A micro SD card can store a maximum of 50 data log files for each Base Module. If you
insert the same card into another Base Module, it can store another 50 data log files for
the current Base Module, but the maximum number of lines that a card can store is limited
to its memory size. A data log file on the micro SD card can store a maximum of 20000
lines. If the memory of the micro SD card is full and you want to create a new data file,
then an error message will be generated automatically.
IDEC SmartRelay automatically creates file names with the format of
"<XYZ>_<number>.csv". <XYZ> stands for the last part of the four-part IP address code
of the connected Base Module. It ranges from one digit to three digits. <number>
indicates the sequential number of the created data file and ranges from 1 to 50. Do not
change the file name because the Base Module cannot recognize user-defined names.
You can only upload the most recent data log file on the micro SD card from IDEC
SmartRelay to WindLGC.
Under the following circumstances, IDEC SmartRelay creates a new data log file:
• When the circuit program in IDEC SmartRelay is changed
• When the number of lines in the data log file exceeds 20000
The created file will have a name with an increased number index, for example, if the
name for the current data file is "135_1.csv", the new file will be named "135_2.csv".
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