Horner-apg XL6 OCS Manual de usuario descargar pdf (Pagina 55)

MAN0883-05-EN CH.11

March 4, 2010 Page 55 of 135 #1037

Synchronous modes synchronize the reset (or set) to the selected quadrature input and the

selected marker polarity. Figure 10.1 below indicates which mode to select based on the markers

timing diagram. Consult the documentation provided with your encoder to determine the marker

pulse timing.

Note that the Marker input is sampled within 50 micro seconds of the associated

quadrature edge. It is left to the user to determine if this meets the time constraints of the

measured drive.

Note that if the Marker input pulse consecutively spans more than one of the specified

edges, quadrature-decoding operation is unpredictable.

Sync mode selection Waveforms (Clockwise Rotation )

__________________________________________________________________

[1]

[2]

High, Reset on 2 rising [SYNC]

High, Reset on 1 falling [SYNC]

High, Reset on 2 falling [SYNC]

High, Reset on 1 rising [SYNC]

*While not displayed in this figure, modes for low level (inverse logic) are also supported

for each state.

Figure 11.1 – Sync pulse mode illustration

The accumulator is reset to zero on the specified edge if rotation is clockwise (as shown in figure

10.1 above). However, if rotation is reversed, the accumulator is alternately set to Counts per

rev – 1 on that same physical edge. When direction is reversed, that same physical edge is seen

(by the internal decoder) as having the opposite edge polarity as shown below.

Mode Direction

(HSC1)

(HSC2)

Marker

(HSC3)

Reset

Value

Async, Reset on rising edge Rising 0

Async, Reset on falling edge Falling 0

Async, Reset on both edge Both 0

High, Reset on 1 rising Clockwise Rising High 0

“ Counter Falling High CPR - 1

Low, Reset on 1 rising Clockwise Rising Low 0

“ Counter Falling Low CPR - 1

High, Reset on 1 falling Clockwise Rising High CPR - 1

“ Counter Falling High 0

Low, Reset on 1 falling Clockwise Rising Low CPR - 1

1 2 ... 50 51 52 53 54 55 56 57 58 59 60 ... 134 135

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Horner-apg XL6 OCS Manual de usuario Pagina 55

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