Banner EZ-ARRAY USB Serial Adapter - Manual (Page 22)

20
P/N 126701
Banner Engineering Corp. • Minneapolis, U.S.A.
www.bannerengineering.com • Tel: 763.544.3164
A-GAGE EZ-ARRAY
QuickStart Guide
Receiver Interface
Because single-edge scan is capable only of measuring the
height of an opaque object that blocks the bottom channel
and all channels up to the height of the object, the pertinent
measurement modes are LBB (last beam blocked) or TBB
(total beams blocked). When single-edge scan is selected, the
selected measurement mode will be applied to both analog
outputs. Selection of OD/ID with single-edge scan will result in
an error code.
Measurement Modes (S3 and S4)
The measurement modes, determined by switches S3 and S4
in combination, define what information is calculated by the
sensor and sent via the analog outputs. See Section 1.10 for
measurement mode definitions. Discrete output 1 will conduct
when analog output 1 detects a target. (If single-edge scan is
selected, select measurement mode LBB or TBB.)
During normal operation, the 3-Digit Diagnostic display reads out
the numerical value of the specified measuring mode for analog
output 1.
Analog Slope (S5)
Switch S5 defines the analog output slope. As the measurement
mode values increase, the analog output voltage can either
increase (positive slope, S5 ON) or decrease (negative slope, S5
OFF). Switch S5 applies the same slope to both analog outputs.
Complementary / Alarm (S6)
Switch S6 defines the operation of discrete output 2. When
the receiver user interface is used, discrete output 1 is active
whenever an object is detected by the sensor (normally open
operation). In complementary mode (S6 ON), output 2 will
always be in the opposite state of output 1. In alarm mode (S6
OFF), discrete output 2 will be active when the sensor detects
a system fault. System faults include a failed emitter, mis-wiring
of the emitter/receiver communication wire (the pink wire), and
low excess gain (if the sensor is configured for high-contrast
sensitivity).
4.2 Alignment / Blanking Button (Electronic Alignment)
The Alignment/Blanking push button is used both to maximize
the alignment and to access the blanking feature. The electronic
alignment routine adjusts the emitted light level to maximize
sensor performance. Perform the procedure at installation and
again whenever the emitter and/or receiver is moved. For GUI
software alignment instructions, see Section 5.
Blanking is used to maintain sensing accuracy in applications
where a fixed object (for instance a permanently mounted
bracket) will block one or more beams. The sensor will ignore
the blanked channels when calculating outputs from the selected
measurement modes.
Push-Button Electronic Alignment and Blanking Routine
To initiate the electronic alignment procedure, use a small
screwdriver to press the Alignment/Blanking button for two or
more seconds. The left-hand digit of the 3-digit display will read
“A” (representing alignment); the right two digits will show the
number of beams blocked. The receiver is learning the clear
condition. Rotate the sensors as required (but do not change
the distance between them). When the receiver’s 3-digit display
shows 0 beams blocked, the sensors are adequately aligned.
Press the Alignment/Blanking button again for two seconds to
exit alignment mode. If all sensor light channels are clear, the
EZ-ARRAY stores each channel’s signal strength in non-volatile
memory and reads “ - - - ” on the 3-digit display. Re-alignment is
not required again, unless the emitter or receiver is moved.
If any beams are blocked during run mode, they can be blanked
while the sensor is in alignment mode for more accurate
measurement. If they are blocked during alignment mode, the
blocked beams must be either blanked or cleared for alignment
to proceed (see below). While the “A” is visible on the receiver
display, momentarily (about 0.5 seconds max.) press the
Alignment/Blanking button again. The “A” will change to “n”
to indicate the sensor is ready to “learn” the blanking pattern;
momentarily press the button again to exit the blanking routine.
The sensor blanks the blocked beams and the display changes
to “A.”; the period following the lefthand digit signifies blanking
is active. Press the Alignment/Blanking button for two seconds
to exit alignment mode. The EZ-ARRAY stores each channel’s
signal strength in non-volatile memory and reads “ -. - - ” on the
3-digit display to denote blanking is in use.
Flashing “000” on the 3-Digit Display
When returning to run mode, the receiver determines whether
any unblanked beam channels are obstructed. If any channels
are obstructed, the new alignment settings are not saved; the
receiver flashes zeroes on the display three times and sensing
will continue, using the previously set alignment settings. If this
occurs, either clear the blocked beams and repeat the alignment
routine or repeat the alignment routine and blank the blocked
beams.
4.3 Gain (Sensitivity Adjust) Button
The sensor has two sensitivity levels: high excess gain and low
contrast, selected by use of the Gain push button. The high-
excess-gain setting is commonly used when opaque objects are
sensed. The low-contrast setting is commonly used when semi-
transparent objects are sensed.
To change the sensitivity level, press and hold the button for two
seconds. The left-hand digit of the 3-digit display will read “
l
”;
the right-hand digit will read “1” (high excess-gain) or “2” (low-
contrast. The sensitivity level can then be toggled between the
values 1 and 2. When the desired sensitivity level is displayed,
hold the Gain push button for 2 seconds and the sensor will
return to run mode.