Omron CJ1W-EIP21 Operation Manuals page 53

Indicators (LEDs)
An EtherNet/IP Unit is equipped with the following indicators that indicate the operating status of the
node itself and the overall network.
EIP 21
MS
NS
COMM
100M
10M
 Status Indicators: MS, NS, COMM, 100M, and 10M
The MS (Module Status) indicator indicates the status of the node itself and the NS (Network Status)
indicator indicates the status of the network.
The COMM, 100M, and 10M indicators indicate the status of Ethernet communications.
The MS and NS indicators can be green or red. The COMM, 100M, and 10M indicators are yellow.
These indicators can be lit, flashing, or not lit. The following table shows the meaning of these indi-
cator conditions.
Refer to Section 13 Troubleshooting for details on using these indicators for troubleshooting.
Indicator
MS
NS
COMM
100M
10M
CJ-series EtherNet/IP Units Operation Manual for NJ-series CPU Unit (W495)
Name Color
Lit
Red
Flashing
Module Status
Green Lit
--- Not lit
Lit
Red
Flashing
Network Status Lit
Green
Flashing
--- Not lit
Lit
Communication Yellow
Not lit
Lit
100Mbps Yellow
Not lit
Lit
10Mbps Yellow
Not lit
LED status Indicated operating status
Fatal error
Recoverable error
Normal
Power supply OFF
Fatal error
Recoverable error
Tag data link and message connections established
Tag data link and message connections not established
Offline or power supply OFF
Transferring data
Not transferring data
100BASE-TX link established
100BASE-TX link not established
10BASE-TX link established
10BASE-TX link not established
1 Introduction
1
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