DTU4x0 GPRS/NB-IoT Data Loggers
User Guide. r. 2.01 | 2022-05-17
Tel.: +420 234 076 670
13
e-mail: [email protected]
DTU4x0 Operating Modes
The device supports several operation modes:
Sleep (standby) mode
Low-power consumption mode, in which DTU collects data from metering devices and checks the state
of inputs. In the sleep mode, data logger works most of the time, and goes into connection mode only
according to the schedule, when setting up the device or in case of emergency situations
.
NOTE:
When connected via USB, the device does not go into a sleep mode.
Server connection and data transfer mode
Data transmission from the DTU to a dispatching server occurs over the TCP protocol, which has a client-
server architecture. The device always works in the "Client" mode and independently establishes an
outgoing connection with the "Server” with the subsequent data transfer. The default server is
cloud software with access via the web interface.
Data logger establishes a connection with the server in the following cases:
•
According to the established schedule
for the transfer of accumulated readings. Within 2 minutes
after connecting, the device transmits data for the past period to the server, after which it goes into
a sleep mode until the next activation. If during one connection not all information is transmitted,
the rest of the data will be sent the next time you connect.
•
In case of emergencies.
Data logger
sends alarm messages to the server in the event of a short
circuit, when the power has been switched from external to backup, when sensors are triggered,
when the polling rate at each of the inputs is exceeded.
•
When turning on and rebooting the data logger
.
•
When pressing
S2
button
– data logger setup/connection to the server button.
•
When a magnet is brought towards the case of data logger
- DTU sends a message to the server.
