L-GAGE
®
LT7 Long-Range Time-of-Flight Sensor
P/N 120244
3
Banner Engineering Corp.
•
Minneapolis, MN U.S.A.
www.bannerengineering.com • Tel: 763.544.3164
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Figure 4. Each discrete output has its own
limit for background suppression
Figure 5. The two discrete outputs share
identical limits for background
suppression, but are
complementary
Figure 3. Teach-mode options for each
output
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Password.
A Password function is included to provide a measure of security for the
sensor settings. If Password is set to ON, the password must be entered before any
programming can take place. The password is always “1234”; it cannot be changed.
(The security results from the requirement to know the entry procedure and the timeout
function. If the password is not entered within approximately 10 seconds, the sensor
will return automatically to Run mode.) Measuring continues in the “background” while
the password is entered).
Select measurement
in millimeters or inches (actually, hundredths of an inch. To “see”
whole inches on the display, imagine a decimal point on the display, two spaces in from
the right; see Figure 8).
Offset.
An offset value can be entered or taught, which increases or reduces the
measured value, in order to compensate for a mounting position that does not
correspond with the zero point of the device. (For example, 3000 actual distance minus
1200 mm offset value equals 1800 mm adjusted output value.) The offset value can be
up to 100,000 mm (or corresponding inch value); the plus or minus is also selectable.
The offset value reverts to 0 if the factory preset function is used. The offset value
applies equally to all outputs.
Factory Preset.
Sensor easily reverts to factory preset conditions:
Teach-In
–
Q1 and Q2 (Discrete)
– single switchpoint (full sensing range), ± 5mm hysteresis
QA (Analog)
– Mode 1, rising (positive slope, full sensing range)
Offset
– 0
Unit
– mm
Serial
– RS422
Password
– OFF
Multiple Outputs.
The sensing distance can be taught using QuickSet, Teach-In, or by
manually entering the distance value(s). Either one or two sensing conditions may be
taught for each output (see Figures 4 and 5).
Discrete outputs:
The two outputs may be configured identically or they may have
completely independent limits and configuration. One or two sensing conditions can
be taught for each. If one condition is taught, the output sets a switching threshold,
around which the selected hysteresis is applied. The two-point TEACH result differs,
depending on whether QuickSet or TEACH-IN is used to set the limits. In QuickSet,
the sensor averages the two taught values, then centers a 200 mm window around
the averaged point (100 mm to each side). TEACH-IN window limits remain as taught;
the window can be any size. The selected hysteresis is applied to each threshold and
window near limit and far limit equally, no matter how they are taught.
Analog outputs:
Analog limits 1 and 2 must be at least 300 mm apart. Individually
teach 4 mA (A1) and 20 mA (A2) points or use the Copy function (selectable in the
Analog Output Mode menu) to copy the discrete limits (only the first limits of discrete 1
and 2) to the analog output. (If copying Discrete limits to Analog, Discrete limits 1 and
2 must be at least 300 mm apart, or sensor will not copy those limits.) The order in
which they are copied determines the analog output slope. For Mode 1 (positive slope)
selected:
Q1, then Q2 – Limit Q1.1 becomes A1 (4 mA); Q2.1 becomes A2 (20 mA)
Q2, then Q1 – Limit Q1.1 becomes A2 (20 mA); Q2.1 becomes A1 (4 mA)
Manual Adjust:
After Teach mode, Manual Adjust (or Edit) may be used to adjust the
value set for any output. It also can be used instead of Teach mode, to input a precise
limit value.
