Lenze 8400 HighLine - Manual (Page 1265)

Lenze · 8400 HighLine · Referenzhandbuch · DMS 10.0 EN · 06/2014 · TD05/TD14
1265
17 Function library
17.1 Function blocks
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
17.1.23.2 Function 2: nIn1 > nIn2
This function serves, for instance, to implement the comparison "actual speed is higher than a limit
value" (n
act
> n
x
) for one direction of rotation.
[17-8] Function 2: Switching performance
Functional sequence
1. If the value at nIn1_a exceeds the value nIn2_a, bOut changes from FALSE to TRUE.
2. Only if the signal at nIn1_a falls below the value of nIn2_a - hysteresis again, bOut changes back
from TRUE to FALSE.
[17-9] Function 2: Example
 C00681 : Hysteresis
TRUE
FALSE
bOut
nIn2_a
nIn1_a
Œ
 C00681 : Hysteresis
nIn1_a
nIn2_a
TRUE
FALSE
bOut
t
t
Œ