Operating Manual V25/09.2019
Ventus / Ventus-X / V200A
Chapter 20 Appendix 68
20.7.3.3 Function 0x04 Read Input Registers
The input registers are containing the measurement values of the compact weather station and
the related status information.
The measurement values are mapped to the 16bit registers using scaling factors (0 … max.
65530 for unsigned values, -32762 … 32762 for signed values).
Values 65535 (0xffff) resp. 32767 are used for the indication of erroneous or not available
measurement values. A more detailed specification of the error can be evaluated from the
status registers.
The assignment of values to the available register addresses (0 … 124) has been arranged in a
way so that the user can read the most frequently used data with few (ideally only one) register
block requests
Following blocks have been defined:
Status information
Frequently used values which are independent of the unit system (metric / imperial) in
use
Frequently used values in metric units
Frequently used values in imperial units
Other measurement values
When using the metric unit system the first three blocks can the supply all data usually required
with one request.
There is no difference in the register assignment between the sub types of the WS family. If,
dependent on the type, some value is not available, this will be indicated by setting the register
to the error value..
For detailed information about measurement ranges, units etc. please refer to the related
description of the UMB channels (Chapter 8 and 20.1)
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