HBM GEN3i, User Manual

Page: 665 / 1160

Timer/Counter Mode Angle
In angle measurement mode the counter will use a user defined maximum angle and revert back to zero when this count value is reached.
Using the reset input the measured angle can be synchronized to the mechanical angle. The real
-
time calculators can extract the RPM from
the measured angle independent from the mechanical synchronization.
∆t ∆t ∆t ∆t
Signal
Direction
Single precision counting
Count Up Count Up Count Up Count Down Count Down Count Down
Signal
Direction
Double precision counting
Count Up Count Up Count Up Count Down Count Down Count Down
Count Up Count Up Count Down Count Down
Signal
Direction
Quad precision counting
Count Up Count Up Count Up Count Down Count Down Count Down
Wheel rotates clock wise Wheel rotates counter clock wise
Wheel rotates clock wise Wheel rotates counter clock wise
Wheel rotates clock wise Wheel rotates counter clock wise
Signal
Reset
Quadrature disk
Signal
Direction
Direction
∆t: Must be > 100 ns
Figure A.253: Bi
-
directional quadrature count modes
Inputs 3 pins: signal, direction and reset
Maximum input frequency 2 MHz
Minimum pulse width 200 ns (2 * Δt)
Minimum setup time 100 ns (Δt)
Minimum hold time 100 ns (Δt)
Accuracy Single, dual and quad precision
Reset input
Level sensitivity User selectable invert level
Minimum setup time prior to signal edge (Δt) 100 ns
Minimum hold time after signal edge (Δt) 100 ns
Angle options
Reference User selectable. Enables the use of the reset pin to reference the mechanical angle to the
measured angle
Angle at reference point User defined to specify mechanical reference point
Reset pulse Angle value is reset to user defined "angle at reference point" value
Pulses per rotation User defined to specify the encoder resolution
Maximum pulses per rotation 32767
Maximum RPM 30 * sample rate (Example: Sample rate 10 kS/s means maximum 300 k RPM)
GEN3i
I3763-3.1 en HBM: public 665