Omron CJ1W-ETN11 Network Card User Manual


 
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Troubleshooting Procedures Section 10-5
True Replace the following items in order to remove the faulty part:
Power supply cable, Power Supply Unit, Ethernet Unit.
5. Connect a 24-VDC power supply.
6. Is the power supply indicator lit on the transceiver?
True Step 9.
7. Is the transceiver cable loose?
True Connect the cable firmly.
8. Replace the following components one at a time in the order given and dis-
card any faulty ones: transceiver cable, transceiver, Ethernet Unit.
9. Execute ping at each node for all nodes on the network to see if commu-
nications are possible.
10. Was not even one response received at every node in the network?
True Check terminators, the coaxial cable, and transceiver cables.
11. Were responses not received only between certain nodes?
True Make sure the distance between transceivers on the coaxial cable
is a multiple of 2.5 m.
Check IP address settings.
Make sure that the remote node supports ICMP.
12. Is an FTP client not mounted on the remote node?
True Mount an FTP client.
13. Are you using FINS communications (e.g., SEND(090), RECV(098), or
CMND(490))?
True Do an internode test.
14. Read protocol status using the FINS command READ PROTOCOL STA-
TUS and check the following parameters in the returned status data. If any
of these items have actually been counted, the remote node may not sup-
port the relevant service.
IP (all communications): Items 2 through 6
ICMP (PING): Items 5 through 8
TCP (FTP and TCP sockets): Items 4 through 6 under reception status
UDP (FINS and UDP sockets): Items 1 through 3
If item 4, 8, or 9 under the IP status is being counted, there may be too
much traffic through the Ethernet Unit. Check your user applications.