High-Speed
Operation, 120 µs Scan
Time
The M1151 PAK-PLS can operate up to 1,800 rpm. The 8channel unit
maintains a repeat accuracy of 120 µs while the 16-channel unit has 200 µs scan time.
Multiple
Program Storage Reduces DownTime at Job Changeovers
The
M1151 PAK-PLS can internally store four or eight independent
programs for different jobs. With a preprogrammed M1151 for different
product runs, the product changeover is as simple as pressing
the MODE and Inc/Dec keys to select the program corresponding to
the job. Remote selection of PLS programs may be accomplished by a
PLC or an external selector switch.
Built-in
Tachometer and Motion Detector
The built-in tachometer displays the shaft speed in rpm simultaneously
with the position display. Additionally, the built-in motion
detector continuously monitors shaft speed and allows the
programming of HIGH and LOW rpm limits for the motion output. The
motion detector status is indicated on the front-panel by an
indicator LED.
Optically
Isolated Inputs and Outputs
Optically isolated inputs and outputs are standard to provide
enhanced noise immunity and ensure operational integrity of the
M1151 PAK-PLS in harsh industrial environments.
Internal
Diagnostics
The
M1151 PAK-PLS has built in circuitry, which continually monitors
the operation of the unit. If any of the six resolver wires break
or short together, the Broken Wire Detect circuitry will cause a
fault condition. A fail-safe fault output is provided which is
energized ONLY if the resolver cable is intact, the customer power
supply is present, the line voltage is within specifications, and
the processor is not in reset. The fault output will de-energize
if the M1151 detects any of these faults.
Dynamic
Zeroing ModZ
The
M1151 PAK-PLS features optional dynamic zeroing or ModZ (MODification
Zero) to modify the zero reference point for selected channels
independent of actual resolver position. Upon receiving an
external signal, the resolver position for the selected ModZ
channels is reset to zero. Thereafter, the position is incremented
as the resolver rotates and outputs are turned ON or OFF at the
programmed limit settings. The ModZ feature is ideal for gluing
applications, where the glue gun must be activated at certain
positions after detection of an upcoming product. Four ModZ
channels, any of which can be used as a normal channel, are
included in the M1151 ModZ option.
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Brake
Monitor The
optional M1151 Brake Monitor automatically measures the time in ms
from an input brake signal until the resolver shaft stops
rotating. This stopping time is then compared to the programmed
Warning Time and Danger Time and the appropriate Safe, Caution, or
Danger output is energized as a result. The M1151 Brake Monitor is
normally applied as an indication control on metal stamping
presses. The brake wear monitor uses three PLS channels.
Shift
Register
With the Shift Register option, the four shift register channels
can be thought of as programmable position delays. The Shift
Register length (Turns Delay) can be programmed from 1.00 to 50.00
revolutions of the input shaft. There are two shift register
modes. The Mode 1 Shift Register emulates a normal electronic
shift register circuit with a programmable length. To program a
shift register channel for Mode 1 operation, program a single
dwell whose From setpoint is greater than the To setpoint. The
Mode 1 dwell never actually executes; it is a signal for Mode 1
operation. In Mode 1, the input pattern appears at the output
after the input shaft has rotated the programmed Turns Delay
revolutions.
The
Mode 0 Shift Register acts as a multi-turn ModZ. Mode 0 can also
be programmed with a Turns Delay from 1.00 revolutions to 50.00
revolutions. After a FALSE-to-TRUE input transition, the entire
pattern programmed into the Shift Register channel appears at the
channel output after the input shaft has rotated the Turns Delay
number of revolutions. The M1151 Shift Register model features
battery backup of the shift register memory to retain shift
register position during power down.
The
shift register memory may be cleared either from the keyboard or
from an external input. The additional output channels are
programmed as normal PLS outputs.
Front
Panel Selectable Analog Output: Position or Tachometer
With the analog option, analog options are front panel selectable,
retrieving the user from ordering specific analog output format or
setting DIP switches. Moreover, if the application requirements
change, they can be easily accommodated by keying in the
appropriate information.
The
M1151 unit can provide either position or tachometer in the analog
form. The following ranges are available and front panel
selectable:
- 0
to 10V
- -10
to +10V
- 0
to 5V
- -5
to +5V
- -2.5
to 2.5V
- 4
to 20 mA sourcing
- 4
to 20 mA sinking
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