2 function 2: nin1 > nin2, Function 2: nin1 > nin2 6, 18 function library – Lenze 8400 User Manual
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18
Function library
18.1
Function blocks | L_Compare_1
1186
Lenze · 8400 protec HighLine · Reference manual · DMS 3.0 EN · 03/2013 · TD05
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18.1.23.2 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.
[18-8] 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.
[18-9] Function 2: Example
: Hysteresis
TRUE
FALSE
bOut
nIn2_a
nIn1_a
: Hysteresis
nIn1_a
nIn2_a
TRUE
FALSE
bOut
t
t