Digital electronic modules
3.2 Parameters of the Digital Electronic Modules
ET 200S
Manual, Edition 10/2005, A5E00514527-01
3-5
3.2.4
Pulse stretching
Definition
The pulse stretching is a function used to modify a digital input signal. A pulse at a digital
input is stretched to at least the length set in the parameters. If the input pulse is already
longer than the selected length, it is not changed
Principle of Pulse Stretching
The figure below shows a few examples of input pulse modification.
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ರSURFHVVHGರ
LQSXWVLJQDO
3URFHVVVLJQDO
3URFHVVVLJQDO
7IRU!HGJH
7IRU!HGJH
7KHVHFRQGSXOVHRXWSXWGXULQJDFWLYH
SXOVHVWUHWFKLQJLVVKLIWHGXQWLOWKH
FXUUHQWVWUHWFKLQJSHULRGKDVH[SLUHG
6KRUWSXOVHVRXWSXWZLWKLQD
SXOVHVWUHWFKLQJF\FOHDUH
LJQRUHG
Figure 3-1
Principle of Pulse Stretching