Banner EZ-ARRAY USB Serial Adapter - Manual (Page 10)

8 P/N 130426 Rev. C
Banner Engineering Corp. • Minneapolis, U.S.A.
www.bannerengineering.com • Tel: 763.544.3164
A-GAGE EZ-ARRAY
Instruction Manual
Overview
Figure 1-10. Measurement mode examples
Last Beam Made (LBM)
First Beam Made (FBM)
Receiver
Emitter
Last Beam Blocked (LBB)
First Beam Blocked (FBB)
Receiver
Emitter
Total Beams Made (TBM)
Total Beams Blocked (TBB)
Receiver
Emitter
10
20
30
40
50
60
In Last Beam Blocked mode,
last beam is #55 of 60
In First Beam Blocked mode,
first beam is #20 of 60
In Last Beam Made mode,
last beam is #50 of 60
In First Beam Made mode,
first beam is #40 of 60
In Total Beams Made mode,
38 of 60 possible beams are
made
In Total Beams Blocked mode,
22 of 60 possible beams are
blocked
10
20
30
40
50
60
10
20
30
40
50
60
“Beam Location” Modes
• First Beam Blocked (FBB): The location of the first blocked
beam.
• First Beam Made (FBM): The location of the first made
(unblocked) beam.
• Last Beam Blocked (LBB): The location of the last blocked
beam.
• Last Beam Made (LBM): The location of the last made beam.
• Middle Beam Blocked (MBB): The location of the beam midway
between the first and last blocked beams.
“Beam Total” Modes
• Total Beams Blocked (TBB): The total number of blocked
beams.
• Total Beams Made (TBM): The number of beams made.
• Contiguous Beams Blocked (CBB): The largest number of
consecutively blocked beams.
• Contiguous Beams Made (CBM): The largest number of
consecutively made beams.
1.8 Electronic Alignment Routine
The objective of the optical alignment process is to adjust the
emitter light level to maximize sensor performance. Perform
the alignment procedure at installation and again whenever the
emitter and/or receiver is moved.
During the alignment procedure, the receiver polls each beam
channel to measure excess gain and performs a gain adjustment
for each beam. When the system exits the alignment procedure,
each channel’s signal strength is stored in non-volatile memory.
The procedure can be performed using the receiver remote wire,
the receiver interface or the PC interface (see Section 1.5, 4.2,
or 5.6). The receiver’s Alignment push button may be disabled,
using the PC interface.
1.9 Blanking
If a machine fixture or other equipment blocks one or more
sensing beams, the affected beam channels may be blanked.
The blanking option causes the receiver to ignore the status
of blanked beams for measurement mode calculations. For
example, if a machine fixture blocks one or more beams during
sensing, the output data will be incorrect; if the beams blocked
by the fixture are blanked, the output data will be correct.
Blanking may be configured using the receiver’s Alignment push
button, the receiver remote wire, or the PC interface.
For total beam values (TBB and TBM analysis modes), selection
of blanked beams affects the proportional analog outputs.
Blanked beams are ignored both in the number of blocked or
made beams and in the total number of beams. For example, if a
30-beam array has 10 blanked beams and 10 of the remaining 20
beams are blocked, the analog output values will be at mid-range.
1.10 Measurement Mode Selection
The outputs may be configured for any of fourteen measurement
(scan analysis) modes, which refer to specific beam locations,
quantities of beams, or edge transitions. Note that not all
measurement mode options are available when the receiver
interface is used for configuration. Selected modes are individually
assigned to each output (see Section 4.1 or 5.9 and 5.10).
When using the PC interface for configuration, the discrete
outputs can have NPN or PNP polarity (regardless of model), be
normally open or normally closed, and be assigned to any of the
measurement modes. When using the receiver interface, limited
output configuration combinations may be selected (Section 4.1).
NOTE: Array beams are numbered in sequence (beam 1 located
nearest the sensor display; see Figure 1-3). The “first
beam” referenced in the following descriptions is the beam
nearest the sensor display.