NSD ABSOCODER NCV-20NDNMP Specifications & Instruction Manual page 42

10-2. Troubleshooting
The causes and corrective actions for errors that may occur during NCV-20NDN operation are described
below.
NCV-20NDN has LEDs for the DeviceNet monitor (MS and NS) and monitoring error. The operation status
and error contents can be checked by LED light status. The error contents should be checked when an
error has occurred. Clear the error by the recovering methods which corresponding to each error.
If the condition isn't improved, the ABSOCODER sensor or converter might have the malfunction.
● Contents of the DeviceNet monitor LED
Monitor LED
Error name
Light
Name
status
Green Normal
Flickering
Minor error
red
MS
Non-recovery
Red
error
No power
OFF
supply
Online/
Green
connected
Flickering Online/
green disconnected
Flickering Connection
red time out
NS
Red Critical error
Offline/ no
OFF
power supply
Probable cause
Operating in a normal condition
- Recovery is possible.
Either error SE, DE, or PF
has occurred.
- Baud rate setting error.
Recovery is not possible.
Either ME or PF has occurred.
The internal circuit or part might
be broken down or degradation.
The power is not supplied to the
converter.
DeviceNet communication is
normal.
- The Communication
connection is not established.
- NCV-20NDN is not allocated to
the master unit.
Communication timeout of the
I/O connection has occurred.
A DeviceNet communications
error was detected caused by
node address duplication
or Bus OFF.
These errors make
communications impossible.
- Online status is not
established.
- The network power is not
supplied.
Error clear procedures
- Refer to the section "SE,
DE, and PE" on the next
page.
- Correct the baud rate.
Refer to the section "ME and
PE" on the next page.
Restart the power supply for
the converter.
Check the wiring of the
power supply.
Connect the terminating
resistor.
- Correct the node address
duplication.
- Correct the baud rate.
- Correct communications
cable connection problem.
- Connect the terminating
resistor.
- Check whether the
communication connector
is unplugged.
- Check whether the network
power is supplied.
36
Recovering method
Replace the converter
if an error has occurred
again.
Turn ON the power
supply for the converter.
After removing an error
cause, restart the power
supply for the converter.