Manual

SF11 Laser altimeter
Product manual
c: Measuring mode (long range | quick response)
Menu item <c> enables optimisation of the measuring mode to suit applications requiring either long range measurements or a quick
response when signals go out of range. The maximum measuring range remains the same and in many applications there will be little
difference in the performance. However, long range mode is recommended when measuring over water or continually operating at
an altitude above 50 meters. The measuring mode can be also changed using the serial port or the I2C command set.
d: Show or hide the communication menu
Menu item <d> is used to expand or hide the communication menu. The settings available in this menu relate to the serial port and
the I2C port.
e: Serial port baud rate (9600 … 921600)
The serial port communicates using ASCII encoded data. The baud rate of transmission is selected by menu item <e> and toggles
through the standard baud rates from 9600 to 921600. There are 8 data bits, 1 stop bit and no parity or handshaking. The baud rate
cannot be change using the serial port or I2C commands.
f: Serial output mode (on demand | continuous)
Menu item <f> is used to select whether the distance results on the serial port will become available when a command is sent or
continuously. In “on demand” mode the distance readings are transmitted when a ‘d’, ‘D’ or ‘\n’ character is received or the specific
?LD<CR><LF> command is used. In continuous mode, the distance is transmitted all the time but other settings and values can still be
accessed using the associated serial port commands. The serial port output mode can be changed using the serial port command set
but cannot be changed using the I2C commands.
g: I2C bus address (0x00 … 0x7F)
The I2C bus operates in slave mode and accepts a 7 bit address (7 address bits plus 1 read bit) before responding with a 16 bit,
binary coded integer. The address can be set by selecting menu item <g> and is entered as a 7 bit, hexadecimal number. The I2C bus
address cannot be changed using the serial port or I2C commands.
h: Show or hide the analog and alarm menu
Menu item <h> is used to expand or hide the analog and alarm menu. The settings available in this menu relate to the linear analog
voltage output and the alarm.
Item
HMI
Type
Serial
I2C
Measuring mode
menu item <c>
long range
read
?LM<CR><LF>
.write(8) .read(a)
?LM 1<CR><LF>
mode = a
write
#LM,1
.write(9, a)
#LM,1 1<CR><LF>
a = 0 or 1
Item
HMI
Type
Serial
I2C
Serial port output type
menu item <f>
on demand ... continuous
read
?SU<CR><LF>
?SU 0<CR><LF>
write
#SU,0<CR><LF>
#SU,0 0<CR><LF>
SF11 Laser altimeter - Product manual - Revision 10 | of | © LightWare Optoelectronics (Pty) Ltd, 2021 | www.lightwarelidar.com 10 20