meteocontrol blue'Log X series, Руководство по эксплуатации

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14.4.7 Q(AI) procedure
In this procedure the percentage reactive power Q is used as control value.
The specified target value is provided by the grid operator as an analog input signal, for
example via a remote control system with an analog output connected to an analog
input of the blue’Log. The target value is calculat ed from the analog value using a two-
point linear equation. For configuration, the highest and lowest measured values for
the analog signal are required. These lie at the end and the start of the line. The
excitation type for each point must also be given.
Fig. 78: Q(AI) Power Control procedure: Setting measured values
Input box Meaning
Analog input Description of the analog input on the blue’Log
Lowest measurement
value Value pair for the lowest operating point (example: 4 mA
corresponds to 31.25 % overexcited)
Highest measurement
value Value pair for the highest operating point (example:
20 mA corresponds to 31.25 % under-excited)
Retain last value If enabled, the last valid specified value is retained in the
event of an error. The fallback value loses its validity for
this procedure.