Documentation

This port sets the width of the speed filter. This input is only visible if the Make Dynamic option of the Speed Measurement Filter parameter is set. Valid input for this port is an integer number between 1 and 256 (for details see Quadrature Decoding Speedfilter)

Options for the input are:

This input is only visible if the Show Clear Position Input parameter is set.

This port shows the current position of the decoded signal. The current slot number is shown. Depending upon the Captured Edges and Extrapolate Position Output parameters, this output is either an integer or a fraction between 0 and the number set in the Number of Slots Vector parameter minus 1 (for details see Quadrature Decoding). This output is only visible if the Show Position Output parameter is set.

This port shows the number of revolutions recorded by the QAD. The output is signed, the range is -2²⁷ … 0 … 2²⁷ -1. The output overflows if the limit is attained; for example, when rotating forward and the position number reaches 2²⁷ minus 1, the next number will be -2²⁷. This output is only visible if the Show Turns Output parameter is set.

This output shows the speed in RPM (Revolutions per Minute). The output is positive when rotating forward (i.e. clockwise) and negative when rotating backward (i.e. counterclockwise). This output is only visible if the Show Speed Output parameter is set.

	Note
	The detection of the rotation direction is only possible when the Captured Signal Edges parameter is set to Captured A + B Signal.

This output shows if the Speed [RPM] output is valid. If the Speed Filter Width input changes, the Speed [RPM] output might become invalid. This output is only visible if the Show Speed Output parameter is set.

This output is set high if the C/index position has been detected once. Possible values for each vector element are:

This output is only visible if the Show Index Found Flag Output parameter is set.

This output shows the time in seconds since the last signal edge was detected. This output is only visible if the Show Time Since Last Signal Edge Output parameter is set.

	Note
	Enabling the output ports introduces additional latency.

This parameter associates a code module block with a configurable I/O module setup block. Set this value to match the Module ID defined in the setup block of the required configurable I/O module.

A vector of channels this driver block entity will access. You can specify channels in the range 1-N (N = the number of channels implemented in your specific configuration file defined in the Setup block). The width of this vector also defines the subsequent size of some of the following parameters if scalar expansion applies. With a single block, all the channels of the block are synchronized.

Defines the base sample time at which this driver block gets its sample hit. This parameter can also be set to -1 for inherited sample time. The units are in seconds.

The number of slots per revolution (for details see Quadrature Encoding).

Selects which signal edges will be captured:

When set, the QAD code module will extrapolate the position (number of slot) between two detected signal edges. The extrapolation uses the current measured speed and the time since the last signal edge was detected. Note that the extrapolation is only 100 % valid if the speed of the measured signals is constant (for details see Quadrature Decoding Extrapolate).

When set, the QAD A and B signals are interchanged.

Defines how the C/Index signal is used by the QAD code module. The settings are:

Defines the latch mode. The settings are:

Defines how the C/Index signal is passed to the QAD code module. The settings are:

Each signal edge (configured by the Captured Signal Edges parameter) generates a new speed value. The speed values are filtered by a moving average filter on the QAD code module (for details see Quadrature Decoding Speedfilter). When the Make Dynamic parameter is not set, the depth of the filter can be set with the Filter Width [Number of Measurements] parameter. In this case the number of averaged speed values is the same for a complete model run. When the Make Dynamic parameter is set, the depth of the filter can be set with the Speed Filter Width block input signal. In this case the number of averaged speed values can be changed during model runtime.

Each of the QAD code module input signals passes a glitch filter. Signal glitches (positive and negative) with a time less than the time defined by the Filter Width [s] Vector parameter do not pass. (for details see Quadrature Decoding Glitchfilter)

Note

Set the glitch filter as low as possible since this parameter also limits the maximum frequency of the QAD signal to be measured. In addition, we recommend setting the glitch filter time to a value not greater than half of the measurable QAD signal pulse time, for example; if the expected maximum frequency of the QAD signal (the A- or B-Signal) to be measured is 1 MHz (meaning the QAD signal is 500 ns low and 500 ns high), then the glitch filter should be set to 250 ns or less.

When this parameter is set, the Clear Position input is shown.

When this parameter is set, the Clear Index Found Flag input is shown.

When this parameter is set, the Position [Number of Slot] output is shown.

When this parameter is set, the Turns output is shown.

When this parameter is set, the Speed output is shown.

When this parameter is set, the Index Found output is shown.

When this parameter is set, the Time Since Last Signal Edge output is shown.