KEYENCE DL-DN1 - Manual (Page 65)

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- DeviceNet Compatible Network Unit DL-DN1 User’s Manual (FD-MH) -
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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.