Read and write a parameters of a table
Some SOMMER sensors are equipped with multiple transducers and their settings are listed in a table
(see example below). A value within such a table is addressed by its row-index (01, 02 …) and column-
index (A, B …). A corresponding SDI-command has the following format:
EXAMPLE
In this example of a snow scale the value in row 01 and column B of the para-
meter D-D-E is changed to -1.4.
0XWDDE01B=-1.4|!
Answer:
0DDE01b=-1.4|<CR><LF>
Adopt settings
Some settings need to be adopted with the command
aXW_ts|!
, with
a
the sensor address. It is
recommended to issue
aXW_ts|!
after each configuration change.
12.5 Modbus
12.5.1 What is Modbus?
Modbus is a serial communication protocol used for transmitting information over serial lines
between electronic devices. The device requesting the information is called the Modbus Master and
the devices supplying information are Modbus Slaves. In a standard Modbus network, there is one
Master and up to 247 Slaves, each with a unique Slave Address from 1 to 247. The Master can also
write information to Slaves.
Modbus has become a standard communication protocol in industry, and is now the most commonly
available means of connecting industrial electronic devices. It is often used to connect a supervisory
computer with a remote terminal unit (RTU) in supervisory control and data acquisition (SCADA)
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