Delta AH500 - Page 530

AH500 Module Manual
11-104
11.7.1 Indicator Diagnosis

NS indicator
LED status
Indication
How to deal with
Off No power or bus OFF
1. Make sure that AHRTU-DNET-5A is powered
and is connected normally.
2. Check if the communication is normal and the
baud rate of AHRTU-DNET-5A is the same as
that of the master.
Green light
blinking
No connection
between
AHRTU-DNET-5A and
the DeviceNet master
Configure AHRTU-DNET-5A in the DeviceNet
software properly and download the configuration
Green light
ON
I/O data transmission
between
AHRTU-DNET-5A and
the DeviceNet master
is normal.
--
Red light
blinking
A timeout occurs
when there is an I/O
connection between
AHRTU-DNET-5A and
the DeviceNet master.
Refer to the error codes on the digital displayer to
shoot the trouble.
Red light ON
Network error, ID
duplication, no
network power, or
bus-off
1. Make sure all the devices have their unique
node address.
2. Check if the network installation is correct
3. Check the baud rate of AHRTU-DNET-5A is
the same as that of the bus.
4. Check if the node address of
AHRTU-DNET-5A is valid.
5. Check if the network power is normal.

MS indicator
LED status
Indication
How to deal with
Off No power
Make sure that AHRTU-DNET-5A is
powered and is connected normally.
Green light
blinking
1. AHRTU-DNET-5A is
waiting for the I/O data of
the DeviceNet master
2. No I/O data between
AHRTU-DNET-5A and the
DeviceNet master
3. PLC connected to the
master is in STOP state
1. Configure AHRTU-DNET-5A in the
DeviceNet software properly and
download the configuration.
2. Switch PLC to RUN state.
Green light
ON
I/O data transmission is normal --
Red light
blinking
No network power, configuration
problem or module warning
1. Check if the network power is
normal.
2. Reset the internal parameters in
AHRTU-DNET-5A.
3. Check if there is any error or warning
in some module.