Rockwell Automation Publication 842E-UM001C-EN-P - September 2016
13
Encoder Overview
Chapter 2
Configurable Parameters
The EtherNet/IP technology allows for certain encoder parameters to be
configured over the network.
• Count direction
• Counts per revolution
• Preset value
• Velocity output
• IP addressing
The Electronic
Data Sheet File
The electronic data sheet (EDS) file contains all information that is related to
the measuring-system-specific parameters and the operating modes of the 842E
EtherNet/IP encoders. The EDS file is integrated using the EtherNet/IP
network configuration tool to configure and place in operation the 842E
EtherNet/IP encoder
For more information, go to
www.rockwellautomation.com/resources/eds/
and search on “842E.”
Operating Principle of the
Encoder
The 842E EtherNet/IP encoder acquires the position of rotating axes and
outputs the position in the form of a unique digital numeric value. Optical
acquisition of the rotary position value is from an internal coded disk.
The 842E-SIP-xxx EtherNet/IP Is a Single-turn Encoder
Single-turn encoders are used if the absolute position of the shaft for one
revolution is required.
The 842E-MIP-xxxEtherNet/IP Is a Multi-turn Encoder
Multi-turn encoders are used if the absolute position is required for multiple
shaft revolution.
Scalable Resolution
The steps per revolution and the total resolution can be scaled and adapted to
the related application.
The steps per revolution can be scaled in integers from 1…262,144. The total
resolution of the 842E-MIP Multi-turn EtherNet/IP encoder must be 2
n
times
the steps per revolution. This restriction is not relevant if the round axis or
endless shaft functionality is activated.
