Instruction Manual

5-5
- DeviceNet Compatible Network Unit DL-DN1 User's Manual -
5
Appendix
5-3 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.