Troubleshooting using the led indicators, Troubleshooting using the led indicators -3 – Rockwell Automation 1761-NET-ENIW MicroLogix Ethernet Interface (ENI) User Manual User Manual
Page 123
Publication 1761-UM006E-EN-P - August 2005
Troubleshooting 9-3
Troubleshooting Using the
LED Indicators
The ENI/ENIW status LEDs provide a mechanism to determine the
current status of the ENI/ENIW if a programming device is not present
or available. The LED behavior is described in the following table.
Table 9.4 Series A/B LED Indicators
LED
Description
Color
State
Indicates
RS-232
TX/RX
RS-232 data
transmission
indicator
green
flashing
data is being transmitted or received over the RS-232 port
off
no RS-232 traffic
POWER
module power
green
on
module is powered
off
module may not be powered
LINK
Ethernet link
status
green
on
the module detects a valid Ethernet connection
off
the module does not detect a valid Ethernet connection
Ethernet
TX/RX
Ethernet data
transmission
indicator
green
flashing
steady
During normal operation (Fault LED is off) the Ethernet port is transmitting or
receiving NetLinx packets. For example, if you use “Ping” or “Telnet”, the Ethernet
TX/RX LED will not flash.
(1)
flash
sequence
When the Fault LED is on steady, the Ethernet TX/RX LED flashes the following
error codes:
• ROM Error - 1 flash, then off
• RAM Error - 2 flashes, then off
• Net Controller Error - 3 flashes, then off
• EEPROM error: 4 flashes, then off
• Duplicate IP: 5 flashes, then off
When the FAULT LED is flashing, the Ethernet TX/RX LED flashes the following
error codes:
• Faulty Network Connection: 4 flashes, then off
• ENI/ENIW Not Configured: 5 flashes, then off
• Unspecified Fault: off
off
no Ethernet traffic
FAULT
fault condition
indicator
red
on
lit when a fault condition is present, possible causes
• ROM Checksum Error
• RAM Test Error
• Network Controller Error
• EEPROM Checksum Error
• Duplicate IP
(see Ethernet TX/RX LED behavior above for error codes)
flashing
one of the following:
• faulty network connection
• ENI/ENIW does not have a valid IP address
off
hardware is functioning normally
(1) Indicates Ethernet network traffic to/from the ENI/ENIW.