RS485 Functions
Ammonit GmbH / 2005 - 2009
57
8.
RS485 Functions
8.1. Online access to data
In some cases, it would be convenient to be able to make the measurements
from the sensors linked to the Data Logger available for other applications. For
example, the data-sets could also be used in parallel in the SCADA-system of a
wind farm control system, and processed there online. The RS485-interface
offers a number of convenient options for such purposes.
Digital data supply
When this option is activated the logger sends out a text via the serial interface
which contains the time, continuous measurement data, and stored values. The
receiver filters the required information out of this stream of data. A converter
installed directly at the Logger can also provide the data in a format required by
the network or by the transmission medium.
Modbus-controlled data access
In this case the Data Logger is defined as "Slave“, as described in the section
Sensors/Logger cascading. The receiver can call up the measurement values as
required. (It is important to use the Modbus protocol.)
Analog signal output (with external module)
If the recipient requires analog data, this can be provided by an additional
converter, also controlled via the RS485-interface. The output signals can either
be 0..10V, or alternatively 0/4..20mA.
Summary of Contents for METEO-32
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