Rockwell-automation 842D-60131331BXA DeviceNet Encoder User Manual Bedienungsanleitung PDF herunterladen (Seite 11)

Chapter 1

Overview

Chapter Objectives Chapter 1 provides an overview of your 842D DeviceNet absolute

encoder. In this chapter, you will read about the following:

• Function of the 842D encoder.

• Features of the 842D encoder.

• Steps for setting up the encoder.

• Required tools and equipment.

Overview of the Encoder The 842D absolute multi-turn encoder provides a total resolution of

26 bits. The single-turn position value is transmitted with 13 bits. The

number of multi-turn revolutions is 13 bits. Revolutions are counted

by the use of a gear mechanism. The bus interface is located in the

encoder and is configured as a DeviceNet slave according to

DeviceNet specification, release 2.0.

Features of the Encoder The DeviceNet network is an open, global industry-standard

communication network designed to provide an interface through a

single cable from a programmable controller directly to “smart”

devices such as sensors, push buttons, motor starters, operator

interfaces and drives.

The 842D DeviceNet encoder connects directly to the a DeviceNet

network without the need for additional adapters. Features of the

842D include:

• 26-bit absolute multi-turn operation (8192 steps per revolution x

8192 revolutions) without batteries

• Supports Polling, Cyclic, Change of State (COS) and Bit Strobed

I/O messaging

• Transmission rate up to 500 kBaud.

• Programmable functions

– Electronic alignment (PRESET or Number-SET). Electronic

alignment may be carried out via DeviceNet or via a push-

button in the bus connector of the 842D.

– Clockwise or Counterclockwise (CW/CCW) counting

direction

1 2 ... 6 7 8 9 10 11 12 13 14 15 16 ... 57 58

Keine Kommentare

Rockwell-automation 842D-60131331BXA DeviceNet Encoder User Manual Bedienungsanleitung Seite 11