Table of Contents
Advertisement
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
Off
Green light on
6.2 NS LED
LED status
Off
Green light blinking
Green light on
Red light blinking
Red light on
6.3 MS LED
LED status
Off
Green light blinking
Green light on
Red light blinking
Red light on
6.4 ALARM LED
LED status
Off
Red light blinking
DVP-PLC Application Manual
DeviceNet Remote I/O Communication Module RTU-DNET
Indication
Power is abnormal.
Power is normal.
Indication
No power or duplicate ID
check has not completed.
On-line but not connected to
DeviceNet
On-line and connected to
DeviceNet normally
On-line but I/O connection
timed-out
Network error, cannot check
duplicate ID, no network
power or bus-off
Indication
No power or off-line
Waiting for I/O data, no I/O
data or PLC is in STOP
mode.
I/O data are normal.
No network power;
configuration error
Hardware error
Indication
Normal
RTU-DNET detects low
How to correct
Make sure RTU-DNET is powered.
--
How to correct
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.
--
--
--
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.
How to correct
Make sure RTU-DNET is powered.
Switch the PLC to RUN status and start I/O data
exchange.
--
1. Check if the network power is normal.
2. Reset the parameters in RTU-DNET.
Send your RTU-DNET back to the factory for repair.
How to correct
--
1. Make sure RTU-DNET is powered.
31
Advertisement
Table of Contents
