Rockwell Automation 1771-QA Stepper Positioning Assembly User Manual - Manual (Page 8)

1–2 Introduction
Publication 1771-UM002A–EN–P – May 2000
Stepper motor positioning assemblies can be used in applications
requiring more than three axes by using additional I/O chassis. The
stepper assemblies can be distributed throughout the plant using
remote I/O or data highway configurations.
Typically, each axis can control a linear slide although not limited to
that type of mechanical load. The axes can be controlled
independently or control of the axes can be synchronized.
Programming is based on a data block format where blocks of data
can be manipulated using block format instructions such as
file-to-file move and block transfer read and write instructions. The
stepper positioning assembly can be used with any Allen-Bradley
programmable controller that has block transfer capability and an
expandable data table except for Mini-PLC-2 (cat. no. 1772-LN3)
and PLC-2/20 (cat. no. 1772-LP1) Processors.
When using the PLC-2/20, programming will be more lengthy
because data must be transferred using repeated get/put (word)
transfer instructions.
The number of axes that can be controlled and the complexity of
motion will depend on the memory available for the positioning
program after the data table of the PC processor has been expanded
to store the data blocks.
If this product has the CE mark it is approved for installation within
the European Union and EEA regions. It has been designed and
tested to meet the following directives.
EMC Directive
This product is tested to meet Council Directive 89/336/EEC
Electromagnetic Compatibility (EMC) and the following standards,
in whole or in part, documented in a technical construction file:
•
EN 50081-2EMC – Generic Emission Standard,
Part 2 – Industrial Environment
•
EN 50082-2EMC – Generic Immunity Standard,
Part 2 – Industrial Environment
This product is intended for use in an industrial environment.
Low Voltage Directive
This product is tested to meet Council Directive 73/23/EEC
Low Voltage, by applying the safety requirements of EN 61131–2
Programmable Controllers, Part 2 – Equipment Requirements and
Tests.
Understand Compliance to
European Union Directives