PLECS 3.6 Online Help

Hit Crossing

Purpose

Detect when signal reaches or crosses given value

Library

Control / Discontinuous

Description

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The Hit Crossing block detects when the input signal reaches or crosses a value in the specified direction. If a variable-step solver is used, a simulation step is forced at the time when the crossing occurs. The output signal is 1 for one simulation time step when a crossing occurs, 0 otherwise.

Parameters

Hit crossing offset
The offset that the input signal has to reach or cross.
Hit crossing direction
The value rising causes hit crossings only when the input signal is rising. If falling is chosen, only hit crossings for a falling input signal are detected. The setting either causes hit crossing for rising and falling signals to be detected.
Threshold
The threshold value used for the switch criteria.
Show output port
The output terminal of the Hit Crossing block will be hidden if the parameter is set to off. This setting only makes sense to force a simulation step while using a variable-step solver.

Probe Signals

Input
The block input signal.
Crossing signal
Outputs 1 for one simulation time step when a crossing occurs, 0 otherwise. This probe signal is identical to the output signal.