Lenze DDS Function library Drive Manual de usuario descargar pdf (Pagina 19)

Function library LenzeDrive.lib

Analog signal processing

2.2.5 Output gain and offset (L_AOUT)

2−9

LenzeDrive.lib EN 1.7

2.2.5 Output gain and offset (L_AOUT)

This FB is preferentially used for additional circuitry at analog output terminals, to adjust the gain and

offset.

L_AOUT

nOffset_a

nGain_a

nIn_a

nOut_a

Fig. 2−7 Output gain and offset (L_AOUT)

VariableName DataType SignalType VariableType Note

nIn_a Integer analog VAR_INPUT Input signal

nGain_a Integer analog VAR_INPUT Gain of the input signal

nOffset_a Integer analog VAR_INPUT Offset of the input signal

nOut_a Integer analog VAR_OUTPUT

Function

 Gain

– The value at nIn_a is multiplied by the value at nGain_a .

– The multiplication is performed according to the formula:

[100% @ 100% + 100%]

16384 @ 16384 @ 2

*14

+ 16384

– The result of the multiplication is limited to ±2

 Offset

– The limited value (after amplification) is added to the value at nOffset_a

– The result of the addition is limited to ±2

 Next, the signal is limited to ±2

and output to nOut_a .

nGain_a

nIn_a

nOut_a

nOffset_a

Fig. 2−8 Offset and gain of the analog output

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Lenze DDS Function library Drive Manual de usuario Pagina 19