KEYENCE DL-DN1 - Manual (Page 69)

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- DeviceNet Compatible Network Unit DL-DN1 User’s Manual (SK-1000) -
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Troubleshooting
The indicator lamps on the main unit can be checked to determine the cause of error
and the corrective actions to take.
Module status indicator (MS)
This lamp indicates whether the DL-DN1 is operating properly.
Network status indicator (green)
Sensor communication indicator (green)
Module status indicator (green)
LED indications
during normal operation
LED status Condition Corrective action
Green Solid Operating properly. -
Flashing On standby. • Check that cables and termi-
nating resistors are con-
nected correctly.
• Check that the master unit is
operating correctly.
Red Solid The DL-DN1 may have
failed. Contact your nearest sales
office.
Flashing Data link configuration was
changed while in operation. Check the configuration of the
data link between the DL-DN1
and master unit, and then cycle
power.
Green/
red Flashing The DL-DN1 is checking its
operation in the power-on
process. After completing the check, the
DL-DN1 automatically switches
to the normal state.
Not lit Power is not supplied to the
DL-DN1. Check that the DL-DN1 is cor-
rectly connected with the sensor
amplifiers.