Rockwell Automation 1746-QS,D17466.19 SYNCHRONIZED AXES MODULE - Manual (Page 5)

Chapter
1
Publication 1746-6.19 March 1998
System Overview
This chapter presents a conceptual overview of how you use the
1746-QS module in an application.
The 1746-QS Synchronized Axes Module provides four axes of
closed-loop synchronized servo positioning control, and lets you
change motion parameters while the axis is moving. The module has
four optically isolated inputs for signals from linear displacement
transducers (LDTs) and four optically isolated
10 volt outputs that
interface with proportional or servo valve amplifiers.
The module’s microprocessor provides closed-loop control. The
module reads the axis position and updates the drive output every
two milliseconds, for precise positioning even at high speeds.
The module is designed for use with the Hydraulic Configurator, a
software product that you can obtain from the Allen-Bradley website on
the Internet. The Hydraulic Configurator is an interactive executable
that lets you configure the module and tune its axes. With it, you can:
•
configure axes and store configuration parameters
•
tune each axis independent of the ladder program
•
store multiple commands to initiate repetitive axis motion
•
display a log of the last 64 motion commands sent to the module
•
observe and/or store plots of each axis
•
access help screens that explain and/or describe module features
Important: The Hydraulic Configurator saves considerable time when
tuning axes and troubleshooting faults. Thereafter, your ladder logic
sequences module operation with the machine.
The Allen-Bradley Small Logic Controller (SLC) system is a program-
mable control system with an SLC processor, I/O chassis containing
analog, digital, and/or special-purpose modules, and a power supply.
The 1746-QS module occupies one slot of the I/O chassis and
communicates with the SLC processor over the backplane using 32
words in the SLC processor’s output image table and 32 words in the
input image table. The processor loads or reads the module’s
configuration parameters using M0 or M1 files, respectively. Your
ladder logic sequences synchronized axes movement with machine
operation. The system can be illustrated as follows:
Chapter Objectives
What Is the
1746-QS Module?
What Is the
Hydraulic Configurator
What Is an
SLC-500 System?