IAI America E-Con - Manual (Page 100)

92
8. T
roubleshooting
7. Troubleshooting
If you encountered a problem concerning DeviceNet, check the operating condition using the table below
and remove the cause of the problem. The monitor LEDs, MS and NS, illuminate in two colors (red and
green), and you can check the condition of DeviceNet based on the illumination status and color of each
LED.
If an error occurred, MS or NS should change to steady or blinking red. If you spot a steady or blinking red
light, check (reconfigure) the connections of the power supply and communication cable, DIP switch
settings, parameter settings (X-SEL), etc., and then reconnect the power.
{: Steady light, z: Blinking, ~: Off
Monitor LEDs
MS NS
Grn Red Grn Red
Condition Remedial action
{ - { - Operating normally
{ - z z Waiting for completion
of node address
duplication check by the
master. x Confirm that the baud rate of the master is the same as the baud rates of all slaves.
If not, correct the applicable settings and then restart the system.
x Confirm that the connectors are connected correctly.
x Confirm that the communication power (24 VDC) is supplied.
x Confirm that the master is operating correctly.
x Confirm that the communication cable is not broken.
{ - ~ - Waiting for connection
to be established with
the master. x Confirm that the master is operating correctly.
x Confirm that the applicable slave is registered in the master scan list.
- { z z A hardware error
occurred. x Contact IAI.
(The DeviceNet board may have to be replaced.)
- ~ z z Incorrect DIP switch
setting. x Confirm that the baud rate of the slave is the same as the baud rate of the master.
x Confirm that the configuration is correct.
x After correcting the applicable settings, restart the system.
{
- -
{ Detected a node
address duplication or
bus-off state
(communication was
stopped due to frequent
data errors).
x Correct the node address, and then restart the system.
x Confirm that the baud rate of the slave is the same as the baud rate of the master.
x Confirm that the communication cable length is appropriate.
x Check the communication cable for wire breakage or loose or disconnected
connector.
x Confirm that the terminal resistors are installed correctly.
x Confirm that no noise sources are located nearby, that the communication cable is
not wired in parallel with any power line, and that the system is not otherwise
affected by noise.
x After correcting the applicable settings, restart the system.
{
- -
~
A communication time
out occurred. x Confirm that the baud rate of the slave is the same as the baud rate of the master.
x Confirm that the communication cable length is appropriate.
x Check the communication cable for wire breakage or loose or disconnected
connector.
x Confirm that the terminal resistors are installed correctly.
x Confirm that no noise sources are located nearby, that the communication cable is
not wired in parallel with any power line, and that the system is not otherwise
affected by noise.
x After correcting the applicable settings, restart the system.
NS switches
repeatedly between
steady green and
blinking green. Or, NS
switches repeatedly
between blinking red
and blinking green. A communication error
occurred. x Confirm that the applicable slave is registered in the master scan list.
x Confirm that any of the I/O area is not used by other slave.
x Confirm that the I/O area does not exceed the area permitted for use by the master
unit (in the case of fixed assignment).
8.