Ethernet Communications Modules, 3rd Edition, Rev. D
7-3
Chapter 7: Maintenance and Troubleshooting
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A
B
C
D
ECOM Module LEDs
Corrective Action
Off
On
Flash
Legend:
Troubleshooting Chart (Continued)
LINK/LINKGD
ACT
ERROR/ERR
1. Try another cable that you know works.
Check pinouts (see page 2-12).
3. Replace ECOM module.
2. Try another port on the hub or
another hub.
ECOM100
OK / STATUS
ACTIVE/ACT
LINKGD/LINK
ERROR/ERR
ECOM(--F)
LINK/LINKGD
ACT
ERROR/ERR
2. Try another cable between PC and hub
or the other communicating ECOM and
hub.
5. Could be related to Windows configura-
tion. Consult Windows documentation.
3. Try another port on the hub or another
hub.
4. Make sure you have not exceeded the
recommended cable length for your
network cable. The link signal could
arrive with sufficient strength even
though the data transmission does not.
1. Are PLCs in RUN mode? Some commu-
nications require initiating and responding
PLCs to be in RUN mode.
ECOM100
OK / STATUS
ACTIVE/ACT
LINKGD/LINK
ERROR/ERR
ECOM(--F)
LINK/LINKGD
ACT
ERROR/ERR
1. Try another cable between PC and hub
or other ECOM and hub.
3. Confirm that ECOM module is in a usable
slot in the PLC base (see pages 2-7 to 2-9)
and that the CPU and CPU firmware sup-
port the ECOM module.
2. Try another port on the hub or another
hub.
4. Look for errors in the setup of the ECOM
module or in the communication program.
Note: This is also the indication of proper
operation! Troubleshoot only if you are
failing to exchange data.
OR
LINK/LINKGD
ACT
ERROR/ERR
ECOM100
ECOM100
OK / STATUS
ACTIVE/ACT
LINKGD/LINK
ERROR/ERR
OK / STATUS
ACTIVE/ACT
LINKGD/LINK
ERROR/ERR
ECOM(--F)
ECOM(--F)
OR