DTU2xx Data Logger Series
User Guide. r. 2.1 | 2021-11-10
Tel.: +420 538 890 720
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e-mail: [email protected]
The value of the input resistance 1/2 of the unit load of the RS-485 driver is 24 kOhm.
ATTENTION
!
The number of devices physically connected to the line can be up to 256, but the total number of UL in
one line should not exceed 32. When connecting devices via the RS-485 interface, be sure to take into
account the load and other limitations of the network and meters, for example, the number of devices
supported by the meter protocol.
Data logger
supports the following transparent channel operation modes:
Separate transparent channel
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.
When the option is enabled, the data logger starts working
in the "two-channel" mode. On the one hand, the data transfer channel from the GPIO ports
via the ADGT DTU protocol is kept active, and at the same time, a separate transparent
communication channel between RS-232/RS-485 and the upper-level software is activated.
Both channels work in parallel, with a single scheduled communication output
.
Combined transparent channel
. In this mode, a transparent data transfer channel from serial
ports is combined with a data transfer channel using the
ADGT DTU
protocol, which allows
you to simultaneously process the archive of readings from the GPIO ports and data from
serial ports. This mode is necessary if the customer wants to integrate the
ADGT DTU
protocol
into his own data collecting and processing system.
Transparent channel is off.
In this mode, data logger does not process commands from serial
ports.
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The option is applicable only for GPRS data logger.
