Diagnostics and troubleshooting
Leuze electronic
DDLS 200
67
TNT
35/7-2
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V
13.3 Troubleshooting
Fault
Possible cause
Remedy
PWR or UL LED
does not illumi
-
nate
• No supply voltage.
• Hardware defect.
• Check connections and supply volt
-
age at the device; switch back on.
• In event of defect, replace device
and send in for repair.
PWR or UL LED
flashes
• Transmitter/receiver unit is switched
off via input IN.
• Hardware defect.
• Check input IN and position of switch
S1.
• In event of defect, replace device
and send in for repair.
ADJ LED flashes • Light beam interruption or no visual
connection to opposing device
(when opposing device is in the
"Manual" operating mode).
• Misalignment of a DDLS 200 (when
opposing device is in the "Manual"
operating mode).
• Check light path
• Realign transmission path
Bus operation not
possible
• Transmission error
• Wiring error
• Adjustment error (termination, baud
rate, configuration)
• Incorrect bus cable
• Transmitter/receiver unit deactivated
• See error "transmission error"
• Check wiring
• Check settings
• Use specified bus cable
• Check for correct wiring and S1 set
-
ting
• Set to "Adjust" operating mode, ADJ
LED must not flash
Transmission
error
• Incorrect bus termination
• Shielding not connected
• Received signal level too low due to
• Misalignment
• Soiling
• Operation with excessively
large operating ranges
• Protective conductor not connected
• Influenced by parallel data path
• Influenced by cascading data paths
• Intense, direct ambient light
• Disconnect/connect terminating
resistors
• Connect shielding correctly
• Realign (check in "Adjust" operating
mode)
• Clean optical window
• Observe operating limits
• Connect protective conductor
• Operate optical data transceivers
with alternating frequency assign
-
ments, check parallel distances
• Operate optical data transceivers
with alternating frequency assign
-
ments
• Remove ambient light source
DDLS200_E.book Seite 67 Mittwoch, 19. Februar 2020 12:22 12
