Function library
7-174
L
EDSVS9332P-D21 EN 3.0
Transfer function
DFIN-OUT [rpm] = f[Hz]⋅
60
Increments from C0425
Example:
Input frequency = 200 kHz
C0425 = 3 (≙ a number of increments of 2048 Inc/rev.)
DFIN-OUT [rpm] = 200000 Hz ⋅
60
2048
= 5859 rpm
Signal adaptation
Finer resolutions than the power-of-two format can be realised by connecting an FB (e.g. CONV3 or
CONV4).
Example:
The FB CONV3 converts the speed signal into a quasi-analog signal.
The conversion is performed according to the formula:
CONV3 − OUT [% ] = f[Hz]⋅
0, 4
Increments from C0425
⋅
C0950
C0951
C0425
DFIN
DFIN-OUT
C0426
X9
CONV3
CONV3-OUT
CONV3-IN
C0953
C0952
C0950
C0951
Fig. 7-132 Digital frequency input (DFIN) with connected converter
Stop!
If C0540 = 0, 1, 2, 3 and a feedback system C0025 > 10, you must not use the digital frequency input
X9.
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