MICRO-EPSILON CSP2008, Инструкция по эксплуатации

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Page 51
Operation
CSP2008
5.3.10.8 Edge Filter
Edge filters avoid signal jumps (“overshooting spikes”) when measuring across edges.
This filter should be used with considerable care. If applied in an unfit manner, the
original signal integrity might be compromised. The upper threshold of the edge filter
activates the filter once; the lower threshold switches the filter off again and performs a
reset. The edge filter can be reactivated when exceeding the upper threshold again. If
the number of ignored measuring values N is set too small, parts of the overshoot may
remain.
If the edge filter is active, the last valid measurement is output at the edge filter for the
time of data processing until the number N of ignored measurement values is reached or
the lower threshold will be underrun.
Lower threshold
Upper threshold
N = 1
Signal filter input
Signal filter output
Time of data processing
Filter active
N = 3
Lower threshold
Upper threshold
Signal filter input
Signal filter output
Time of data processing
Filter active
Fig. 40 N too small, slight overshoot remains Fig. 41 N ideally chosen
Define the data source on the controller to which the edge filter should work.
Menu Calculation > Block n > Data source 1.
Define the upper and lower threshold for the edge filter.
Menu Calculation > Block n > Upper/lower threshold.
Define the number of ignored and substitued measuring values N.
Menu Calculation > Block n > Number of ignored and substitued measuring values
N.
5.3.10.9 MinMax
The MinMax function determines from up to six input signals the lowest and the greatest
value. Input signal may be a sensor signal or an output of a calculation block.
The both minimum and maximum outputs of the function can not be used as input sig-
nals for other blocks.
Define the calculation block and the data sources for which minimum and maximum
should be calculated.
Menu Calculation > Block n > Data Source 1 ... Data Source 6.