Rockwell Automation 1785-Lx0C15 ControlNet PLC-5 Programmable Controllers Quick Start - Manual (Page 26)

Publication 1785-QS006C-EN-P - April 2002
4-4 Troubleshoot the Processor System
Indicator Color 1 Probable Cause Recommended Action
Off Internal diagnostics failed 1. Turn power off, make sure ControlNet address is
not 00, reseat processor, then power up
2. Clear memory and reload your program
3. Replace EEPROM with new program
4. If still an error, replace the processor
No power Check power supply
Steady Red Faulted unit Cycle power or reset unit
If fault persists, contact your Allen-Bradley Company,
Inc. representative or distributor
Flashing
Green
Normal operation if processor is in
FLASH memory program mode
No action required
Flashing
Red/Green
The processor’s ControlNet address
is above UMAX
Configure the ControlNet network so that UMAX is at
least as high as the processor’s ControlNet address.
Set the processor’s ControlNet address at or below
UMAX.
Alternating
Red/Green
Self-test No action required
Alternating
Red/Off
Incorrect node configuration Check network address and other ControlNet
configuration parameters
Off Channel disabled No action required
Configure for ControlNet communication
Steady
Green
Normal operation No action required
Flashing
Green/Off
Temporary errors No action required
Make sure that ControlNet is properly terminated
Flashing
Red/Off
Media fault Check media for broken cables, loose connectors,
missing terminators, etc.
No other nodes present on network Add other nodes to the network
Flashing
Red/Green
Incorrect network configuration Cycle power or reset unit
If fault persists, contact your Allen-Bradley Company,
Inc. representative or distributor
1 Definition of terms:
• alternating – the two indicators alternate between the two defined states at the same time (applies to both indicators viewed
together); the two indicators are always in opposite states, out of phase
• flashing – the indicator alternates between the two defined states (applies to each indicator viewed independent of the other); if both
indicators are flashing; they flash together, in phase
• steady – indicator is on continuously in the defined state
A B
and
A B
or