User Manual

Data log
LOGO!
254 Manual, 06/2014, A5E33039675
3. Press
OK
on the selected input ("M1" in this example) and the cursor appears in a
flashing solid square. To select a different element from the available list (for example,
B3), press
. Press
OK
. LOGO! shows the following display:
4. In the following example, you can see that this "L1" is now connected to the B3 block:
Note
LOGO! 0BA8 provides a 1024
-byte buffer for data logging. If the data in this buffer
reaches 512 bytes, LOGO! automatically
writes data to the micro SD card inserted in the
card slot. If the speed of data generation in LOGO! 0BA8 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 dat
a 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 LOGO! 0BA8
can only store 512 bytes of data log and the left data log gets lost.
A micro SD card can store a maximum o
f 50 data log files for each LOGO! Base Module.
If you insert the same card into another LOGO! Base Module, it can store another 50 data
log files for the current LOGO! Base Module, but the maximum number of lines that a
card can store is limited to its me
mory 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.
LOGO! automatically creates file n
ames with the format of "<XYZ>_<number>.csv".
<XYZ> stands for the last part of the four
-part IP address code of the connected LOGO!
Base Module. It ranges from one digit to three digits. <number> indicates the sequential
number of the created data file an
d ranges from 1 to 50. Do not change the file name
because the LOGO! Base Module cannot recognize user
-defined names.
You can only upload the most recent data log file on the micro SD card from LOGO! to
LOGO!Soft Comfort.
Under the following circumstances
, LOGO! creates a new data log file:
•
When the circuit program in LOGO! 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 fi
le is "135_1.csv", the new file will be named "135_2.csv".