Rockwell Automation 1771-SDN/B INSTL.INSTR.DEVICENET SEMINAR - Manual (Page 23)

DeviceNet Seminar Installation Instructions 23
Publication 1787Ć5.5 - December 1995
The DeviceNet channel has a bicolor (green/red) network status
indicator (NET). The following table provides troubleshooting
information about the DeviceNet channel communication link.
If the NET indicator is Then Which indicates Take this action
Off The device has no power or the channel
is disabled for communication due to bus
off condition, loss of network power, or
has been intentionally disabled.
The channel is disabled for DeviceĆ
Net communication.
PowerĆup the module, provide netĆ
work power to channel, and be sure
channel is enabled in both the modĆ
ule configuration table and module
command word.
Flashing Green The twoĆdigit numeric display for the
channel indicates an error code that proĆ
vides more information about the condiĆ
tion of the channel.
The channel is enabled but no comĆ
munication is occurring.
Configure scan list table for channel
to add devices.
Solid Green There's normal operation. All slave devices in the scan list
table are communicating normally
with the module.
Do nothing.
Solid Red The communications channel has failed.
The two digit numeric display for the
channel displays an error code that proĆ
vides more information about the condiĆ
tion of the channel.
The module may be defective. Reset module. If failures continue,
replace module.
Flashing Red The twoĆdigit numeric display for the
channel displays an error code that proĆ
vides more information about the condiĆ
tion of the channel.
At least one of the slave devices in
the module's scan list table has
failed to communicate with the modĆ
ule.
Examine the failed device and the
scan list table for accuracy.
Your 1747-SDN Scanner Module uses numeric displays to indicate
diagnostic information about the status of your module. The display
flashes at 1 second intervals. The following table summarizes the
meanings of the numeric codes.
If the numeric code is Which indicates Take this action
0 Ć 63 Normal operation. The numeric display
matches the scanner's node address on
the DeviceNet network.
Do nothing.
70 Module failed the Duplicate Node
Address check
Change the module channel address to
another available one. The node address
you selected is already in use on
that channel.
71 Illegal data in scan list table (node numĆ
ber alternately flashes).
Reconfigure the scan list table and
remove any illegal data.
72 Slave device stopped communicating
(node number alternately flashes).
Inspect the field devices and verify
the connections.
73 Device ID does not match scan list table
entry (node number alternately flashes).
Enter a matching scan list device ID.
74 Data overrun on port detected. Modify your configuration and check for
invalid data.
75 No network traffic has been detected. Verify your connections.
76 No direct network traffic for the
module detected.
None. The module hears other network
communication.
77 Data size returned does not match scan
lists entry (node number alternately
flashes).
Reconfigure your module and change
the addressing.
78 Slave device in scan list table does not
exist (node number alternately flashes).
Add the device to the network or delete
the scan list entry for that device.
top part of module
DeviceNet
STATUS
MODULE NET
ADDRESS/ERROR
node address
and status
display