Rockwell-automation 1746-HSCE2 Multi-Channel High Speed Counter Module Manual de usuario descargar pdf (Pagina 22)

Publication 1746-UM002B-EN-P - August 2004

2-2 Module Operation

Input Configurations

Input configurations determine how the A and B inputs cause the

counter to increment or decrement. The six available configurations

are:

• Pulse/External Direction

• Pulse/Internal Direction

• Up and Down Pulses

• X1 Quadrature Encoder

• X2 Quadrature Encoder

• X4 Quadrature Encoder

See the Summary of Available Counter Configurations on page 2-8 for

the input configurations available for the counters, based on operating

mode.

Pulse/External Direction

With this configuration, the B input controls the direction of the

counter, as shown below. If the B input is low (0), the counter

increments on the rising edges of input A. If the input B is high (1),

the counter decrements on the rising edges of input A.

Figure 2.2 Pulse/External Direction Configuration

12321012

Input A

Encoder or Sensor

Count Pulse

Count

Input B

Input Z

Direction Control

Sensor or Switch

Direction Control

High = Decrement

Low = Increment

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Rockwell-automation 1746-HSCE2 Multi-Channel High Speed Counter Module Manual de usuario Pagina 22