Lenze 8400 - Page 342

6 I/O terminals
6.1 Digital input terminals
342
Lenze · 8400 HighLine · Reference manual · DMS 12.0 EN · 06/2017 · TD23
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Calculation of the output signal
The output value at dnPosIn12_p is calculated as per the formula below:
Example
You want to determine the counter content of the integrator at a certain speed at the input and a
certain integration time t.
Given values:
• nFreqIn12_v = 1000 rpm ≈ integer value 1092
• Integration time t = 10 s
• Starting value of the integrator = 0
Solution:
• Conversion of the nFreqIn12_v input signal:
• Calculation of the output value:
t = integration time
16384 ≡ 15000 rpm
1 ≡ 1 incr.
dnPosIn12_p [incr.] nFreqIn12_v [rpm] t [s] 65535 [incr./rev.]⋅⋅=
1000 rpm
1000 rev.
60 s
-----------------------
=
dnPosIn12_p
1000 rev.
60 s
-----------------------
10 s
65535 incr.
Rev.
----------------------------
⋅⋅ 10922666 incr.==