HT22IoT-09
User’s
Manual
31
the internal memory (or other value defined by the user), the archive is automatically
rewritten to the file system's memory. The memory is a circular buffer. After the memory is
full, the oldest data is overwritten. The internal archive can be read, copied and deleted.
HT22IoT monitors have file system internal memory of the size of 8GB (memory
size of the file system can be increased on request or according to the needs of the
manufacturer) to which the data from the internal memory are automatically rewritten in the
form of files. Data can be downloaded via Ethernet using FTP or Web site.
Minimum archiving period is 10 seconds.
5.8.2. Configuration of archiving
Website is used to configure the archiving parameters. Archiving can be continuous
and conditional. Triggering conditional archiving can be carried out in one of four
possibilities presented in
Fig. 24
( n-on, n-off, off, on). Continuous archiving is activated by
selecting h-on archiving type, and it is turned off by selecting the h-off option
.
Fig. 24. Types of conditional archiving
Ar_L -
Lower threshold of archiving
Ar_H - Upper threshold of archiving
5.8.3. File system internal memory
HT22IoT monitors are equipped with file system internal memory. FAT and FAT32
file systems are supported. During registration the monitor creates directories and files of
the file system in the internal memory. An example of the directory structure is shown in
Fig. 25
.