Lenze EVS9332xS - Manual (Page 97)

Function library
Function blocks
3.2.16 Comparator (CMP)
3−45
l
EDSVS9332S−EXT EN 2.0
3.2.16.2 Function 2: CMP1−IN1 > CMP1−IN2
This function is used, for example, to implement the comparison "Actual speed is higher than a limit
value (n
act
> n
x
)" for a direction of rotation.
l If the value at input CMP1−IN1 exceeds the value at input CMP1−IN2, the output CMP1−OUT
changes from LOW to HIGH.
l Only if the signal at input CMP1−IN1 falls below the value of CMP1−IN2 − C0681 again, the
output changes from HIGH to LOW.
CMP1−OUT
CMP1−IN1 CMP1−IN2
1
0
C0681
CMP1−IN2
C0681
t
CMP1−IN1
t
CMP1−OUT
Fig. 3−40 Exceeding signal values (CMP1−IN1 > CMP1−IN2)
3.2.16.3 Function 3: CMP1−IN1 < CMP1−IN2
This function is used, for example, to implement the comparison "Actual speed is lower than a limit
value (n
act
<n
x
)" for a direction of rotation.
l If the value at input CMP1−IN1 falls below the value at input CMP1−IN2, the output CMP1−OUT
changes from LOW to HIGH.
l Only if the signal at input CMP1−IN1 exceeds the value of CMP1−IN2 − C0681 again, the
output changes from HIGH to LOW.
CMP1−OUT
CMP1−IN1 CMP1−IN2
1
0
C0681
CMP1−IN2
C0681
t
CMP1−IN1
t
CMP1−OUT
Fig. 3−41 Values falling below signal values (CMP1−IN1 CMP1−IN2)
3.2.16.4 Function 4: |CMP1−IN1| = |CMP1−IN2|
This function is the same as function 1. Before signal processing the absolute value of the input
signals (without sign) is generated.
This can be used to implement the comparison "n
act
= 0".
3.2.16.5 Function 5: |CMP1−IN1| > |CMP1−IN2|
This function is the same as function 3. Before signal processing the absolute value of input signals
(without sign) is generated.
This can be used to implement the comparison "|n
act
| > |n
x
|" irrespective of the direction of rotation.