KEYENCE DL-DN1 User Manual
Page 79
5-3 Troubleshooting
5-7
- DeviceNet Compatible Network Unit DL-DN1 User's Manual -
5
Ap
pend
ix
Sensor communication indicator
This lamp indicates whether the DL-DN1 is communicating properly with sensor
amplifiers.
The cause of the error can be identified by reading the error code through I/O
communication or explicit messaging.
"Error information list" (page 3-8)
LED status
Condition
Corrective action
Not lit
Power is not supplied to the
DL-DN1.
Check that the DL-DN1 is cor-
rectly connected with the sensor
amplifiers.
Green
Solid
Communicating correctly.
-
Flashing
In process of power-on
reset.
After the power-on reset time
has elapsed, the DL-DN1 auto-
matically switches to the normal
state.
Red
Flashing at
fixed inter-
vals
Temporarily unable to com-
municate with sensor ampli-
fiers.
Check for any noise source
around the DL-DN1. (The error
is automatically corrected after
the cause is removed.)
Repeating
of 4 con-
secutive
flashes
Model error (0003h)
Connect a sensor amplifier of a
compatible model.
Mixed connection error
(0004h)
Remove the incompatible sen-
sor amplifier.
Number-of-units error
(0006h)
Observe the number of connect-
able sensor amplifiers.
Solid
Initialization error
(0001h/0002h/0005h)
Check the number of connected
sensor amplifiers and the con-
nection to the sensor amplifiers,
and then cycle power. If the
error can not be restored, con-
tact your nearest sales office.
Sensor-to-sensor communi-
cation error
(0007h)
Check the connections of the
sensor amplifiers, and then
cycle power.