Chapter 4
13
4.6 Digital signal output (SDI-12)
All SEBAPuls sensors can be equipped with a digital SDI-12 output instead of the standard analog
output.
4.6.1 Settings via SDI-12 protocol
The sensor address of SEBAPuls can be changed by the following commands of the SDI-12 protocol:
b<CR><LF>
b – the address of the sensor (will equal the new
address or the original address if the sensor is
unable to change the address)
<CR><LF> - terminates the response
4.6.2 Measurement value output
4.6.2.1 Start measurement command
The SEBAPuls supports the following start measurement command:
aM! (resp. aMC! with checksum)
With the aM! – command the measurement of channel 1 is started. As a response the sensor sends,
in addition to the number of available channels, a hold-back time after which the measured values
are available. If measured values are earlier available a Service Request can be sent so the collecting
of data will happen faster.
Collecting the measurement values:
Collecting the measurement values is done by the aD0! command, whereas aD0! corresponds to
channel 1.
4.6.2.2 Concurrent measurement
Furthermore it is possible to start measurement of all channels concurrently by the aC! command.
aC! (resp. aCC! with checksum)
With the aC! – command the measurement of channel 1 is started. As a response the sensor sends,
in addition to the number of available channels, a hold-back time after which the measured values
are available. If measured values are earlier available a Service Request can be sent so the collecting
of data will happen faster.
Collecting the measurement values:
Collecting the measurement values is done by the aD0! command, whereas aD0! corresponds to
channel 1.
To Next Page
Loading...