Lenze 8400 HighLine - Manual (Page 1273)

Lenze · 8400 HighLine · Referenzhandbuch · DMS 10.0 EN · 06/2014 · TD05/TD14
1273
17 Function library
17.1 Function blocks
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
17.1.28.1 Function 1: dnIn1 = dnIn2
This function compares two signals with regard to equality. It can, for instance, provide the
comparison "actual speed equals setpoint speed " (n
act
= n
set
).
• Use C01672 to set the window within which the equality is to apply.
• Use C01671 to set a hysteresis if the input signals are not stable and the output oscillates.
[17-12] Function 1: Switching performance
[17-13] Function 1: Example
 C001671 : Hysteresis
 C001672 : Window
TRUE
FALSE
bOut
dnIn2_p dnIn1_p
Œ  Œ 
 C001671 : Hysteresis
 C001672 : Window
dnIn1_p
dnIn2_p
TRUE
FALSE
bOut
t
t
Œ


Œ