Operating Manual V25/09.2019
Ventus / Ventus-X / V200A
Chapter 20 Appendix
56
seconds after reset / power on. If a valid UMB telegram is received within this time, the device
will stay in UMB mode for the configured time out (several minutes) so that the configuration can
be modified.:
Connect the PC to the
Ventus
through an RS-485 converter
Start the Config Tool and create a
Ventus
with the address of the actual device and
activate at least one sensor. Start the measurement (will report connection error at first)
Reset the device (Power off / on)
When measurement values are received the measurement can be terminated, the
interface is now open for configuration.
20.6.2 Command Set
Due the applied measurement processes the
Ventus
will, different from other sensors described
in the SDI-12 document, always measure continuously. This causes some special properties:
The device does not need a “Wakeup” and does not have a sleep mode. So the
reactions to “Break” signals and any related timings are inapplicable. “Break” will be
ignored by WS devices.
Data requested with M- or C- commands are always available immediately. The device
will always respond with
a000n
resp.
a000nn
. This means the device will not send any
service request and will ignore measurement abort signals. The logger should request
the data immediately.
M- and C- command only differ in the number of values made available in the buffers (in
both cases up to the maximum permitted by the standard of 9 resp. 20).
We recommend to use the commands für continuous measurement (R-commands) to
request the data.
