Lenze E94A - Manual (Page 561)

Lenze · 9400 function library · Reference manual · DMS 6.7 EN · 08/2014 · TD05
561
5 Function blocks
5.161 L_TbCompare_n - scaled comparison
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5.161.3 Function 3: dnIn1_n < dnIn2_n
Selection: C04080 = "2"
• This function serves, for instance, to implement the comparison "actual speed is lower than a
limit value" (n
act
n
x
) for one direction of rotation.
[5-123] Function 3: Switching performance
Functional sequence
1. If the value at dnIn1_n falls below the value at dnIn2_n, bOut_b changes from FALSE to TRUE.
2. Only if the signal at dnIn1_n exceeds the value at dnIn2_n - C04082 again, bOut_b changes from
TRUE to FALSE.
[5-124] Function 3: Example
TRUE
FALSE
bOut
C04082
dnIn2_n
dnIn1_n
dnIn1_n
C04082
dnIn2_n
TRUE
FALSE
bOut
t
t