Rugged,
Reliable Resolver for Position Transducer
The Touch-PLS
uses a resolver as a position transducer. Unlike incremental
encoders, the resolver, along with its noiseimmune ratiometric
converter, always gives true machine position--even if the machine
moved during a power outage. The resolver, due to its
construction, is immune to temperature and humidity extremes and
mechanical shocks and vibrations.
Short-Circuit-Proof
Resolver
The Touch-PLS uses AVG Automation's standard
short-circuit-proof resolver circuit. Thus, in case of an
accidental short in the resolver wiring, costly damage to the PLS
resolver decoder and the resulting downtime is avoided.
Broken-Wire
Detection
The Touch-PLS features a broken resolver-wire detector to
supervise the resolver input signal. The broken-wire detector will
signal the fault output if the resolver is missing any signals.
FEATURES:
Highest
Processing Speed
Touch-PLS uses AVG Automation's patented DMA technique, which
converts the resolver's analog output signal to a digital form,
then compares all the setpoints, and activates all the outputs in
less than a millisecond. The high-speed ratiometric
resolver-to-digital converter and the microscan time guarantees
perfect machine operation at speeds up to 1,800 RPM.
Multiple
Program Storage
The Touch-PLS can internally store 32 independent programs for
different jobs. With a pre-programmed Touch-PLS for different
product runs, the product change over is as simple as
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pressing
a button on a touch screen to select the program corresponding to
the job. Remote selection of PLS programs may also be accomplished
by a PLC.
Leading- and Trailing-Edge
Speed Compensation Touch-PLS
features a Speed Compensation (Rate Offset) to compensate for
speed variations. The Rate Offset, individually programmable for
each channel, is used to advance the PLS settings as a function of
the machine speed
Pulse
Programming
Touch-PLS can be fine-tuned while your machine is running. Either
or both of the ON and OFF Setpoints can be incremented or
decremented, or a fixed dwell can be incremented or decremented,
as needed.
Angle
ON/Time OFF
Touch-PLS can be programmed to have its outputs turned ON at an
angle and turned OFF after a programmed time by touching the
screen. For example, Channel 12 can be turned ON at an angle of
100' and stay ON for a period of 2.45 seconds.
Programmable
Functionality: Brake and ModZ
Touch-PLS features a dynamic zeroing or ModZ (Modification Zero)
to modify the zero reference point, independent of the actual
resolver position. After the PLS receives the ModZ input, the
resolver position is reset to zero. Touch-PLS can also perform
Brake Monitoring to satisfy the OSHA requirement. This PLS can be
field-programmed to have Brake Monitoring Functionality (initiated
by entering a Caution and Danger limit). If you do not select
Brake Monitoring, the user must select ModZ or the unit defaults
to normal PLS functionality. (If Brake Monitoring is selected, the
unit cannot function as ModZ.)
Flexible
Group Assignment
Touch-PLS's Flexible Group Assignment can be a powerful and useful
feature. When it is desirable to control several different
machines linked to the same drive shaft, output channels may be
grouped together into one of five independent sections. The base
group is always PLS, while the other four groups (1-4) may be
defined as PLS or ModZ type. Each PLS group has its own group
offset, while each ModZ group has its own ModZ inhibit zone.
Built-in
Motion Detector and Tachometer
Touch-PLS has a built-in tachometer and motion detector. The
motion detector energizes a relay when the RPM is between the
programmed LOW and HIGH alarm values.
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