Table 46 Required Parameters for WS425 Analog Output Operation Mode
Parameter
Name
Default Value Allowed Values Description of How to Emulate WS425
aout1err
1000 0 …. 32000 Set 1 for voltage output and 625 for frequency
output for similar operation as with WS425.
aout1_g
1 0 …. 100 Gain for AOUT1. Set 0.017895 for compatibility
with WS425 voltage output. Set 11.18 for
compatibility with WS425 frequency output.
aout2_g
1 0 …. 100 Gain for AOUT2. Set 0.0027855 for compatibility
with WS425 potentiometer output.
aout1mode
3 0 = Current
1 = Voltage
2 = Frequency
3 = Disabled
Analog output mode for AOUT1. Set 1 for WS425
voltage output compatibility. 2 for WS425
frequency output compatibility.
aout2mode
7 4 = Current
5 = Voltage
6 = Potentiometer
7 = Disabled
Analog output mode for AOUT2.Set 6 WS425
potentiometer output compatibility.
aout1_oaou
t2_o
0 -10000 … 10000 Oset for AOUT1 and AOUT2.Set output oset to
0.
More Information
‣
S — Set Parameter (page 103)
5.13
Wind Speed Output
In a system configured for WS425, you can set WMT700 to measure wind speed and send
analog output as frequency or voltage.
These sections describe WMT700 analog output:
• Settings are
configured according to 5.12.1 Analog Output Settings (page 128).
• Wires are connected according to 4.11.6.1.1 ROSA Cable 10 m (Analog Outputs)
(page 93).
5.13.1
Frequency
When frequency is selected as the wind speed analog output, WMT700 sends a pulsed
signal of 0 to 10 V with a frequency proportional to wind speed through AOUT1. Every mile
per hour adds 5 Hz (WS425) to the frequency. In SI units, a change of 0.894 meters per
second adds 10 Hz to the frequency. A frequency counter is required to count the output in
Hz and the calculation that scales the result to appropriate units.
The following
figure shows the frequency output when an adapter cable for analog
frequency output (227570SP) and a WS425 cable are used. With WMT700, the wind speed
signal appears at pin 14 (pink) of the adaptor cable.
Chapter 5 – Operation
129
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