Banner L-GAGE LG10 Series - Manual (Page 8)

L-GAGE ™ Laser Gauging Sensor
page 8
RUN Mode
Signal LED
The Signal LED indicates the strength and condition of the sensor’s incoming signal.
Signal LED Status Indicates
OFF
No signal is received, or the target is beyond the range limitations
of the sensor (with some tolerance beyond the recommended
minimum and maximum sensing distance)
Flashing @ 2Hz Received signal is adequate for processing
Flashing @ 10Hz
Received signal is in saturation (i.e., signal is too strong); alarm
output energizes
ON Solid Received signal is within the nominal conditions for the sensor
Output LED
The Output LED lights when the discrete output is conducting.
Power ON/OFF LED
The Power ON/OFF LED indicates the operating status of the sensor.
Power ON/OFF LED Indicates
OFF Power is OFF
Flashing @ 2Hz Discrete or alarm output is overloaded
Flashing @ 1Hz Power ON, Laser is disabled
ON Solid Sensor is operating normally (power is ON, Laser enabled)
Power Up/Laser Enable
When powering up the sensor, the following should occur:
• All LEDs turn ON for 1 second
• Allow 1.25 second delay for Laser Enable at power up. (If sensor is already powered
up, allow 0.25 second for Laser Enable.)
Analog Output
The L-GAGE Laser Gauge may be programmed for either a positive or a negative output
slope, depending on which condition is taught first (see Figure 5). If the near limit is
taught first, the slope will be positive; if the far limit is taught first, the slope will be
negative. Banner’s unique scalable analog output (patent pending) automatically
distributes the output signal over the width of the programmed sensing window. Factory
analog output is 4 to 20 mA; if a voltage output (e.g. 1 to 5V dc) is required, this can be
accomplished by using an alternate hookup (see Hookups, page 5).
The L-GAGE also features a 2-second hold upon loss of the analog signal, which is useful
for profiling and similar applications. In the event of analog signal loss for longer than 2
seconds, the analog output goes to 3.6 mA, which may be used to trigger an alarm.
4
Near
Window
Far
Window
20
Target Position
Analog Output (mA)
Positive
Slope
Figure 5. Output current as a function of
target position
NOTE: The linear analog output tracks
slightly past each window limit
(from 3.8 to 20.5 mA).