4.3.4 Scan Analysis Mode Selection
The control module may be programmed, if desired, for any
one or two of seven Scan Analysis (measurement) Modes.
Each selected mode may be assigned individually to an
output (see section
Analog Output Configuration (Analysis
(p. 22) or
(p. 23)). The
beams in the array are numbered in sequence, with beam
#1 located at the cabled end of the emitter and the receiver.
Beam Location Modes
• First Beam Blocked (FBB): The control module
identifies the location of the First Beam Blocked.
• First Beam Made (FBM): The control module
identifies the location of the First Beam Made
(unblocked).
• Last Beam Blocked (LBB): The control module
identifies the location of the Last Beam Blocked.
• Last Beam Made (LBM): The control module
identifies the location of the Last Beam Made
(unblocked).
• Middle Beam Blocked (MBB): The control module
identifies the location of the Middle Beam Blocked,
midway between the first and last beams blocked.
Beam Total Modes
• Total Beams Blocked (TBB): The control module
totals the number of blocked beams.
• Total Beams Made (TBM): The control module totals
the number of made (unblocked) beams.
• Contiguous Beams Blocked (CBB): The control
module identifies the largest number of
consecutively blocked beams.
• Contiguous Beams Made (CBM): The control
module identifies the largest number of
consecutively made beams.
• Transitions (TRN): The control module counts
changes from blocked to clear and clear to blocked.
For instance, if beams 6-34 are blocked, then there
is a clear-to-blocked transition from beam 5 to beam
6, and a blocked-to-clear transition from beam 34 to
beam 35. Transition mode can be used to count
objects within the array.
The Analysis Mode(s) programmed may be assigned to any
one of the available outputs. Each output can be set for
MEAS1, MEAS2, MEAS1 Inverted, or MEAS2 Inverted.
Last Beam Made (LBM)
First Beam Made (FBM)
Receiver
Emitter
8
16
24
32
40
48
Last Beam Blocked (LBB)
First Beam Blocked (FBB)
Receiver
Emitter
8
16
24
32
40
48
Total Beams Made (TBM)
Total Beams Blocked (TBB)
Receiver
Emitter
8
16
24
32
40
48
In Last Beam Blocked mode,
last beam is #43 of 48
In First Beam Blocked mode,
first beam is #15 of 48
In Last Beam Made mode,
last beam is #37 of 48
In First Beam Made mode,
first beam is #26 of 48
In Total Beams Made mode,
34 of 48 possible beams are
made
In Total Beams Blocked mode,
14 of 48 possible beams are
blocked
Figure 21. Examples of MINI-ARRAY Scan Analysis Modes
4.3.5 Analog Output Configuration (Analysis Mode Assignment)
Analog outputs #1 and #2 may each be assigned to one of the analysis modes. When the selected Scan Analysis Mode
involves first or last beam blocked or made (unblocked), the assigned output will vary in proportion to the beam number
identified during a scan. When the Scan Analysis Mode involves total beams blocked or made, that assigned output will
vary in proportion to the total beams counted during a scan.
Note that the menus used for assignment of the Scan Analysis Modes to the analog outputs include two Inverted
selections. When either MEAS1 Inverted or MEAS2 Inverted is selected, that analog output will decrease as the
measurement mode value increases. An inverted output is at full scale (Span value) when the scan analysis value is zero;
and at maximum scan analysis value, the output is at the Null value.
The Null/Span Configuration screen , may be used to adjust the zero and full scale reading for either analog output. To
display the Null/Span Configuration screen, click on the Null/Span button at the bottom of the PSF Configuration screen.
Each output is independent and must be adjusted separately. Adjust the Null and Span values either by moving the slide
bars, or by entering a new value on the keyboard.
Note: When in the Null/Span screen, the controller has a diagnostic code of 8.
A-GAGE
®
High-Resolution MINI-ARRAY
®
22
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