SLC ControlNet Scanner Module 17
Publication 1747-IN059A-EN-P - February 2001
Status Indicators
The ControlNet status indicators inform you of the operational state
of the ControlNet network.
Indicator
Color
1
Probable Cause Recommended Action
A
and
B
Off No power No action required or apply power.
Steady Red Faulty unit Cycle power or reset unit. If fault
persists, contact your Rockwell
Automation representative or
distributor.
Alternating
Red/Green
Self-test No action required.
Alternating
Red/Off
Incorrect node
configuration or
duplicate ControlNet
node address
Check network address and other
ControlNet configuration parameters.
A
or
B
Off Channel disabled Program network for
redundant media, if required.
Steady
Green
Normal operation No action required.
Flashing
Green/Off
Temporary network
errors
• Check media for broken cables, loose
connectors, missing terminators, etc.
• If condition persists, refer to
ContolNet Cable Planning and
Installation Manual, publication
1786-6.2.1.
Flashing
Red/Off
Media fault • Check media for broken cables, loose
connectors, missing terminators, etc.
• If condition persists, refer to
ContolNet Cable Planning and
Installation Manual, publication
1786-6.2.1.
No other nodes
present on network
Add other nodes to the network.
Flashing
Red/Green
Incorrect node
address
Change 1747-SCNR node address so that it is
less than or equal to SMAX
2
.
Incorrect network
configuration
Reconfigure ControlNet network so that SMAX
2
is greater than or equal to 1747-SCNR node
address.
1. Definition of terms:
steady - indicator is on continuously in the defined state.
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.
2. SMAX is the highest node address on a ControlNet network that can transmit scheduled data.
AB PLCs