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DH3 WIRELESS GATEWAY
USER GUIDE
26.
EVENT-BASED LOGGING (DATA LOGGING)
DH3’s data logging function is an event-based or event-driven type of logging
system. Up to 100,000 points max can be logged regardless of storage capacity of
internal RAM or connected Micro SD Card.
If time-based logging is required using a set time interval, then use DH3’s trending
capabilities described in the next section.
Any point available in the DH3 Import tab can be used for event-based logging.
Event logging is triggered by a specific event created by the user and once the data
falls out of range, the logging will stop until the event is re-triggered.
Only during the boot up phase, DH3 automatically detects if a Micro SD Card is
present and will write to it, providing non-volatile or persistent data. If Micro SD
Card is not detected, it will write to internal RAM, but data stored on RAM is
volatile and will be lost when DH3 is power cycled or updated. If Micro SD Card is
removed while operating, DH3 will switch and write to RAM. If any critical data is
written to RAM, exporting the .csv file is recommended prior to re-booting or
updating DH3.
DH3 Serial Number 0178730001 and higher are equipped with a Micro SD Card
slot. Use only OleumTech Part Number SX1000-SD2 Industrial-grade Micro SD Card
for data logging.
DH3 internal clock must be setup properly
see sec. 21
Logs can also be view through the connected Local LCD Display or Web Server.
Database can be exported to .csv file using BreeZ® or Web Server.
1.
Double-click on DH3 in project tree
2.
Click on Imports tab
3.
Select desired points to be event logged
4.
Right-click on the point and select logging