is a traditional PLS that's been combined with a touchscreen-based
Graphical Operator Interface. No longer do you have to contend
with LEDs, switches, pushbuttons, and keypads. Touch-PLS
graphically depicts your application, while providing machine
settings and status and production data. All programming and
fine-tuning of the PLS settings occurs in a Windows-type
environment. While the unit comes with predesigned screens, AVG
Automation's ltWIN software makes it easy to create or customize
screens to suit your particular application.
size fits all!
You don't need separate PLS and PLC operator interfaces when you
use Touch·PLS because it does double duty; serving as a
PLS interface/control as well as an operator interface to the PLC.
There's no need to clutter up your machine's operator panel with
several different displays when Touch·PLS does it all! It
reduces panel space, which also reduces installation costs and
Principle of Operation
as shown in the block diagram, uses two processors, one for the
PLS and the other to manage, display, and communicate to the PLC.
The PLS processor reads its position signals from the resolver
mounted on the machine's shaft. It controls position-based outputs
independent of the interface processor, providing fast repeatable
outputs. The PLS processor and the interface processor share
information using a 11024-register shared memory. The dynamic
information, such as position, RPM, and output status, is
available to the interface processor for display through
interface processor also shares data with the connected PLC
through a second set of 1,024 registers. This arrangement makes it
easy to display data from both the PLC and PLS on
one screen. In
addition, 32 registers (16 in each direction) are used to exchange
time-critical information between the PLS and PLC through the
interface processor. These registers can be used to send position,
RPM, and output status information to the PLC.