Rockwell Automation 855T DeviceNet Stack Light User Manual - Manual (Page 41)

Troubleshooting and Maintenance 5-3
Publication 855T-UM001C-EN-P May 2005
Once the baud rate is set, the device issues a duplicate MAC ID check. If there is a duplicate
node on the network, the 855T Control Tower Stack Light will fault. Disconnect the device,
change the node address to an available one, and reapply power.
If the stack light or network resets when multiple outputs are turned on, it is likely due to
inadequate network power supply. This device has a high power consumption when used
with incandescent modules. Refer to the DeviceNet Media Design Installation Guide,
Publication DNET-UM072*-EN-P to make sure the power supply sizing and placement are
correct.
Bulb Burnout
Bulb Burnout is reflected in the Status Byte returned from the device. This feature only works
with incandescent modules or incandescent/sound combination modules. The current draw
of other module types is too low to sense correctly.
For burnout detection to work properly, the module type parameter must be configured by
the user. This can be done with the RSNetWorx for DeviceNet Software. If a module is
misconfigured, it may be reflected as a burnout in the Status Byte.
In order to clear the Status Byte, change the bulb and cycle power. If this does not clear the
fault, verify correct configuration of the module type parameter.