User Guide

Publication DNET-UM004A-EN-P - March 2004
12-4 Troubleshoot a DeviceNet Network
Module/Network (Mod/NET) status indicator
I/O status indicator
OK status indicator
State Description: Recommended Action
off • The device has not completed the Dup_MAC_ID test.
• The device may not have power.
Make sure the device has power.
solid green Device is OK and is communicating with other devices on the
network.
None.
flashing
green
Device is OK but is not communicating with other devices on
the network.
If the device is supposed to communicate with other devices,
add those devices to the scan list of this device.
flashing
red
Either or both of the following:
• Recoverable fault.
• Communication with at least 1 device has timed out.
Check the 4-character display to determine if/which device
has timed out.
solid red Any of the following:
• Another device is using the same address.
• Communication problems on the network (bus off
condition).
• Device has an unrecoverable fault and may need to
be replaced.
• Make sure the device has a unique address.
• Make sure all devices are at the same baud rate.
• Cycle power to the device.
• For more corrective actions, see status code 91 on
page 12-17
flashing
red/green
Device is in self test. None.
State: Description: Recommended Action
off The DeviceNet cable is not supplying power to the
communication port.
Apply network power.
flashing
green
The device is in idle mode and is not communicating with the
devices on the network.
To control output devices, place the scanner in run mode.
solid green The device is in run mode and is communicating with the
devices on the network.
None.
State: Description: Recommended Action
off The device does not have power. • Turn on power to the chassis.
• Make sure the device is fully inserted into the
chassis.
flashing
green
The device is OK but is not communicating with the
controller.
Make sure that the device is correctly configured in the I/O
configuration of the controller.
solid green The device is OK and communicating with the controller. None.
solid red • The device is powering-up.
• The device has an unrecoverable fault.
1. Wait to verify that the device has completed its
power up sequence.
2. If the device appears to have completed its power up
sequence, cycle power to the device.
3. Replace the device.