Table of Contents
Advertisement
Diagnostics and Troubleshooting
13.3
Troubleshooting
Error
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
• Receiving level too low due to
• Earth lead not connected
• Influenced by parallel data path
• Influenced by cascading data paths
• Intense, direct ambient light
66
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
• 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 posi-
tion
• 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 earth lead
• Operate data transmission units with
alternating frequency assignments,
check parallel distances
• Operate data transmission units with
alternating frequency assignments
• Remove ambient light source
DDLS 200
Remedy
Leuze electronic
Advertisement
Table of Contents
Troubleshooting
