Troubleshooting - Leuze electronic DDLS 200 Series Original Operating Instructions

13.3

Troubleshooting

Fault
PWR or UL LED • No supply voltage.
does not illumi-
nate
• Hardware defect.
PWR or UL LED • Transmitter/receiver unit is switched
flashes
• Hardware defect.
ADJ LED flashes • Light beam interruption or no visual
• Misalignment of a DDLS 200 (when
Bus operation not • Transmission error
possible • Wiring error
• Adjustment error (termination, baud
• Incorrect bus cable
• Transmitter/receiver unit deactivated
Transmission • Incorrect bus termination
error
• Shielding not connected
• Received signal level too low due to
• Protective conductor not connected
• Influenced by parallel data path
• Influenced by cascading data paths
• Intense, direct ambient light
Leuze electronic
Possible cause
off via input IN.
connection to opposing device
(when opposing device is in the
"Manual" operating mode).
opposing device is in the "Manual"
operating mode).
rate, configuration)
• Misalignment
• Soiling
• Operation with excessively
large operating ranges
Diagnostics and troubleshooting
• Check connections and supply volt-
age at the device; switch back on.
• In event of defect, replace device
and send in for repair.
• Check input IN and position of switch
S1.
• In event of defect, replace device
and send in for repair.
• Check light path
• Realign transmission path
• 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
• 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
DDLS 200
Remedy
67