Rockwell Automation 1769-L32C_L35CR CompactLogix Controller Installation Instructions - Manual (Page 41)

1769-L32C, 1769-L35CR CompactLogix Controller 41
Publication 1769-IN070C-EN-P - May 2008
Interpret Status Indicators as Related to the ControlNet Network
Use the Module Status and Network Status indicators to determine how your
CompactLogix controller is operating on the ControlNet network.
These status indicators provide information about the controller and the
network when the controller is connected to the ControlNet network via the
BNC connectors and describes the possible conditions for module and
network status indicators.
Indicator Condition Description
Steady The indicator is on continuously in the defined state.
Alternating Two indicators alternate between the two defined states at the
same time (applies to both indicators when 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.
IMPORTANT
Keep in mind that the Module Status indicator reflects the module state (for
example, self-test, firmware update, normal operation but no connection
established). The network status indicators, A and B, reflect network status.
Remember that the host is able to engage in local messaging with the card
although it is detached from the network. Therefore, the Module Status
status indicator is flashing green if the host has successfully started the
card. Note, however, that until the host removes reset, all status indicators
on the daughtercard remain off.
When you view the indicators, always view the Module Status indicator
first to determine the state of the daughtercard. This information may help
you to interpret the Network Status indicators. As a general practice, view
all status indicators (Module Status and Network Status) together to gain a
full understanding of the daughtercard’s status.