Advantech PCL-833 handleiding
Handleiding
Je bekijkt pagina 23 van 28
15 PCL-833 User Manual
Chapter 3 Advanced Modes
3.2 Counter Modes
The following table shows the maximum input rate for each input mode and system
clock rate. Values are given for each system clock frequency.
Counter modes are as follows
Quadrature input counter mode
Quadrature input consists of two square wave inputs (A and B) which are 90-drgess
out of phase. The PCL-833 counts the square wave transitions and determines the
direction by comparing whether channel A is leading channel B or vice versa.
There are three different counting methods in quadrature input mode.
X1
The counter will increment (or decrement) the counter whenever a rising edge
occurs on input channel A.
X2
The counter will increment (or decrement) whenever a rising or falling edge
occurs on input channel A.
X4
The counter will increment (or decrement) whenever a rising or falling edge
occurs on input channel A or B.
2-pulse mode
In 2-pulse mode the PCL-833 uses two input pulses as counting sources: one for
clockwise (CW) and one for counter clockwise(CCW) counting. The counter will dec-
rement whenever a rising edge occurs on channel A. It will increment whenever a ris-
ing edge occurs on channel B.
Pulse/direction mode
In pulse/direction mode the PCL-833 uses one input line (A) for pulse input and one
line (B) for direction. If channel B is high (1), the counter will decrement whenever a
rising edge occurs on channel A. If channel B is low (0), the counter will increment
whenever a rising edge occurs on channel A.
Disabled mode
PCL-833 will not accept input, but you can still access all its registers
You select the mode by programming the card's registers: BASE+O for CHI, BASE+I
for CH2 and BASE+2 for CH3.
Mode Maximum input rate
8MHz 4MHz 2MHz
Quadrature X1, X2, X4 1MHz 600KHz 300KHz
2-pulse 2.4MHz 1.2MHz 600KHz
Pulse/direction 2.4MHz 1.2MHz 600KHz
Bekijk gratis de handleiding van Advantech PCL-833, stel vragen en lees de antwoorden op veelvoorkomende problemen, of gebruik onze assistent om sneller informatie in de handleiding te vinden of uitleg te krijgen over specifieke functies.
Productinformatie
| Merk | Advantech |
| Model | PCL-833 |
| Categorie | Niet gecategoriseerd |
| Taal | Nederlands |
| Grootte | 1770 MB |
