Delta Electronics RTU-DNET - Manual (Page 33)

DeviceNet Remote I/O Communication Module RTU-DNET
DVP-PLC Application Manual 31
6 LED Indicator & Trouble-shooting
There are five LED indicators on RTU-DNET. POWER LED displays if the power of RTU-DNET is working
normally. RUN LED displays the working status of RTU-DNET. ALRAM LED shows if RTU-DNET is operating
normally. NS LED and MS LED display the communication connection status of RTU-DNET.
6.1 POWER LED
LED status Indication How to correct
Off Power is abnormal. Make sure RTU-DNET is powered.
Green light on Power is normal. --
6.2 NS LED
LED status Indication How to correct
Off
No power or duplicate ID
check has not completed.
1. Make sure RTU-DNET is powered.
2. Make sure the nodes on the bus are
communicating normally.
3. Make sure at least 1 node or more are
communicating on the network through
RTU-DNET.
4. Check if the baud rate of RTU-DNET is the
same as that of the master.
Green light blinking
On-line but not connected to
DeviceNet
--
Green light on
On-line and connected to
DeviceNet normally
--
Red light blinking
On-line but I/O connection
timed-out
--
Red light on
Network error, cannot check
duplicate ID, no network
power or bus-off
1. Make sure all the devices have their unique
node address.
2. Check the network for correcting media
installation and baud rate.
3. Check if the node address of RTU-DNET is
valid.
4. Check if the network power is normal.
6.3 MS LED
LED status Indication How to correct
Off No power or off-line Make sure RTU-DNET is powered.
Green light blinking
Waiting for I/O data, no I/O
data or PLC is in STOP
mode.
Switch the PLC to RUN status and start I/O data
exchange.
Green light on I/O data are normal. --
Red light blinking
No network power;
configuration error 1. Check if the network power is normal.
2. Reset the parameters in RTU-DNET.
Red light on Hardware error Send your RTU-DNET back to the factory for repair.
6.4 ALARM LED
LED status Indication How to correct
Off Normal --
Red light blinking RTU-DNET detects low 1. Make sure RTU-DNET is powered.