EW50 Industrial LTE Cellular Gateway
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4.2 Data Logging
Data logging is the process of collecting and storing data over a period of time in order to analyze specific
trends or record the data-based events/actions of a system, or connected devices. The data logging function is
a very useful and important feature for SCADA telemetry; it makes the monitoring and analyzing of tasks easier
by checking the status and historical data during whole data acquisition period.
Even facing network connection problems with a remote NOC/SCADA side, you can enable the data logging
proxy function provided by the gateway and continue doing data acquisition and storing of the collected data
in local storage (in .CSV file format). When the network connection is recovered, admin/user can download the
data log files manually via FTP or web UI for further reference and maintenance.
The Modbus Cellular Gateway provides a complete data logging function for collecting the Modbus transaction
data for application requirements. There are data logging schemes to meet different management
requirements. They are Sniffer Mode, Offline Proxy Mode, Full-Time Proxy Mode, and mixed modes for sniffer
and proxy combinations.
With Sniffer mode enabled, the gateway will monitor and record the communication among a specific Modbus
Master and related slaves. It will store the Modbus communication as log files and the administrator can check
what Modbus communication went over the Modbus gateway, and if there is any communication loss among
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General