Rockwell Automation Allen-Bradley ControlLogix DeviceNet 1756-DNB User Manual page 83

Node Address/Status Indicator
Numeric Description
Code
83 Slave device is returning error
responses when module attempts to
communicate with it (node number
alternately flashes).
84 Module is initializing the DeviceNet
network.
85 Data size larger than 255 bytes (node
number alternately flashes).
86 Device is producing zero length data
(idle state) while module is in Run
Mode.
90 User has disabled communication port. Check Module Command Register for
91 Bus off condition detected on comm
port. Module is detecting
communication errors.
92 No network power detected on comm
port.
95 Application FLASH update in progress. None. Do not disconnect the module
97 Module operation halted by user
command.
Troubleshooting
Action
Check accuracy of scan list table entry.
Check slave device configuration.
Slave device may be in another
master's scan list. Reboot slave device.
None. This code clears itself once
module attempts to initialize all slave
devices on the network.
Configure the device for a smaller data
size.
Check device configuration and slave
node status.
disable bit set.
Check DeviceNet connections and
physical media integrity. Check system
for failed slave devices or other
possible sources of network
interference.
Provide network power. Make sure
that module drop cable is providing
network power to module comm port.
while application FLASH is in progress.
You will lose any existing data in the
module's memory.
Check Module Command Register for
halt bit set.
Publication 1756-6.5.19 - May 2000
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