Lenze 8400 TopLine - Manual (Page 1618)

19 Function library
19.1 Function blocks
1618
Lenze · 8400 TopLine · Reference manual · DMS 6.0 EN · 06/2014 · TD05/TD14
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19.1.141.3 Calculation of the output signal
The output value at dnOut_p can be detected according to the following formula:
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:
• nIn_v = 1000 rpm ≈ integer value 1092
• Integration time t = 10 s
• Starting value of the integrator = 0
Solution:
• Conversion of the input signal at nIn_v:
• Calculation of the output value:
t = integration time
16384 ≡ 15000 rpm
1 ≡ 1 incr.
dnOut_p [incr.] nIn_v [rpm] t [s] 65535 [incr./rev.] ⋅ ⋅
=
1000 rpm
1000 rev.
60 s
----------------------- =
dnOut_p
1000 rev.
60 s
-----------------------
10 s 65535 incr.
Rev.
---------------------------- ⋅ ⋅ 10922666 incr.
= =