Troubleshooting; error codes, Ssi cable, L-gage® lt7 long-range time-of-flight sensor – Banner L-GAGE LT7 Series User Manual
Page 17
P/N 120244 Rev. B
17
Banner Engineering Corp. • Minneapolis, MN U.S.A
www.bannerengineering.com • Tel: 763.544.3164
L-GAGE® LT7 Long-Range Time-of-Flight Sensor
SSI Cable Length
Cable Length
< 25 m
< 50 m
< 100 m
< 200 m
< 400 m
Baud Rate
< 500 kHz
< 400 kHz
< 300 kHz
< 200 kHz
< 100 kHz
SSI Cable
The maximum baud rate for reliable data transfer depends on the cable length (see table).
The shielded connection cable is connected to the sensor connector and the ground
terminal of the control cabinet.
CAUTION . . . This sensor contains no
user-serviceable components.
Do not attempt to repair.
Incorrect component values may produce hazardous
laser radiation levels.
LCD Error
Message
Out (Active Low)
Bit
Meaning
Qs
Qp
7
6
5
4
3
2
1
0
BLINDING
Active
0
1
0
0
0
0
0
0
Internal error or ambient light too strong
LAS. ERR.
Active
Active
1
0
0
0
0
0
0
0
Measurement laser faulty – repair or replace
sensor
LOW VOLT
Active
Active
0
0
0
0
0
1
0
0
Voltage too low or error in measurement of
supply voltage
NO VALUE
0
0
0
0
0
0
0
0
First measurement after switching ON –
sensor not yet ready. Message disappears
automatically when ready (after 300 ms).
PLL UNLOCKED
Active
Active
0
0
0
0
0
0
1
0
Counter error – repair or replace sensor
Active
0
0
1
0
0
0
0
0
Temperature out of acceptable range (below
-10°C or above +70°C)
OVERTEMP
Active
(Laser
OFF)
Active
(Laser
OFF)
0
0
1
0
1
0
0
0
Operating temperature too high (above +85°C
within housing); measurement laser switches
OFF. Switch sensor off; sensor may operate
after a cool-down period.
Dist (mm)
> Maximum
Active
0
0
0
1
0
0
0
0
No target in range or sensor badly aligned
Troubleshooting; Error Codes
In the event of errors, corresponding error messages appear on the display and the error
outputs Qs and Qp (active low) are set according to the table below.
Multiple errors may simultaneously exist. The error status may be interrogated via the
RS422 “GSI” command. (For example, if a too-low supply voltage causes a counter error,
the GSI command would report “00000110”.)