Rockwell-automation 1734-VHSC24 Very High-Speed Counter Modules User M Manual de usuario descargar pdf (Pagina 11)

1 Publication 1734-UM003B-EN-P - August 2005

Chapter

About the Modules

What This Chapter Contains

Read this chapter to learn about types, features, and capabilities of the

encoder/counter modules.

Module Description and

Features

The modules install into the POINT I/O terminal base (1734-TB or

1734-TBS) and interface with the Point I/O DeviceNet Pass-through

(1734-PDN) or the Point I/O DeviceNet Adapter (1734-ADN).

A module serves as a signal conditioner, function block, and counter

between the customer process signals on the terminal base and the

POINTBus containing the command information. The main functional

blocks are the following.

• Customer digital I/O interface

• Counter ASIC

• Microprocessor

The module accepts feedback from the following.

• Encoders (either single ended or differential)

• Pulse generators

• Mechanical limit switches

• Frequencies up to 1 MHz

A filter is available with the following settings.

• 50 Hz

• 500 Hz

• 5 kHz

• 50 kHz)

Turn the filter off to achieve the fastest counting rate. The input

voltage range is 5Vdc (VHSC5) or 15-24V dc (VHSC24). The module

returns the count or frequency in the form of a 24 bit binary number

(0 - 16,777,215) expressed in a 32 bit long word.

Each counter has a user-selectable preset and rollover value

associated with it.

The module has 2 outputs that access customer power from the

POINTBus to facilitate various output device voltage requirements.

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Rockwell-automation 1734-VHSC24 Very High-Speed Counter Modules User M Manual de usuario Pagina 11