Diagnostics and troubleshooting
Leuze electronic BPS 300i 67
Table 10.3: Process interface errors – causes and measures
Table 10.4: LED indicators - interface errors – causes and measures
Table 10.5: Position measurement errors – causes and measures
Faults Possible cause Measures
Sporadic interface
error
• Check wiring for proper con-
tacting
Check wiring:
• Check wire shielding
• Check wires used
• EMC coupling • Observe contact quality of screwed or
soldered contacts in the wiring
• Avoid EMC coupling caused by power
cables laid parallel to device lines
• Separate laying of power and data com-
munications cables
• Maximum cable length
exceeded
• Check cable lengths according to the
data rate
Faults Possible cause Measures
BUS LED Off
• No supply voltage connected
to the device
• Check supply voltage
• Hardware error • Send device to customer service
BUS LED red
flashing
• Incorrect wiring • Check wiring
• Communication error • Check interface parameters
• Carry out a reset on the control
• Different protocol settings • Check protocol settings
Faults Possible cause Measures
Measurement value
or read quality is
continuously instable
• Soiling of the BPS optics • Clean the optics of the BPS
Measurement value
or read quality is
poor
• at certain posi-
tion values
• always at the
same position
values
• Soiling of the bar code tape • Clean the bar code tape
• Replace the bar code tape
No measurement
value can be deter-
mined
• No code in scanning beam
• Code not in the working range
of the BPS
• Align the scanning beam with the
bar code tape
• Align the BPS with the bar code tape
(working range 50 mm … 170 mm)
Faulty measure-
ment value
• Wrong bar code tape
BCB grid different from BPS
configuration
• Change BPS configuration to the
bar code tape that is being used
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