(Send(090)/Recv(098)/Cmnd(490)); Udp Socket Problems - Omron CJ1W-ETN11 Operation Manual

Troubleshooting Procedures

10-5-3 UDP Socket Problems

General Problems
1,2,3...
3. Is a CMND(194) instruction being addressed to the local node, e.g. for
socket services?
True ➨ Go to 10-5-6 Network Connection Problems on page 203.
4. Are different UDP port numbers set for FINS communications for both the
local node and the remote node?
True ➨ Set the same port number for both nodes.
5. Are the local and remote nodes both on the same network, i.e. do they
have the same network number in their IP addresses?
True ➨ Step 10.
6. Is the IP address of the remote node missing from the IP address table?
True ➨ Set the IP address of the remote node in the local IP address table.
(Note: Use of the IP address table must be set in the mode settings
for the IP address table to be effective.)
7. Is the IP address of the remote node missing from the IP router table?
True ➨ Set the network number of the remote node in the IP router table.
(With CJ-series Ethernet Units, it is possible to set a default IP
router.)
8. Are the FINS network addresses of the local and remote nodes different?
True ➨ Set both nodes to the same FINS network address.
9. Are you attempting a broadcast transmission?
True ➨ Do not attempt to broadcast to a node with a different network
number. You can broadcast only to nodes on the same IP network.
10. Set the IP address of the remote node in the IP address table or use auto-
matic address conversion.
11. Are you attempting to communicate with a PC on another network?
True ➨ Go to 10-5-6 Network Connection Problems on page 203.
12. Are the routing tables set improperly?
True ➨ Set routing tables at the local node, target node, and any relay
nodes.
Most of the initial steps in these procedures are in question form. Continue in
sequence until a "True" answer tells you to jump to a specified step or until you
are told to perform a specific action that corrects the problem. If performing
the action does not correct the problem, return to the beginning of the proce-
dure and start over.
1. Go through the procedure in 10-5-2 FINS Communications Problems
(SEND(090)/RECV(098)/CMND(490)) before starting this procedure.
2. Is the response code a value other than 0000?
True ➨ Go to 10-6 Troubleshooting with Response Codes on page 207.
3. Is the response code in the results storage area a value other than 0000?
True ➨ Go to 10-7 Results Storage Area Response Codes on page 210.
(There will be no response code in the results storage area if Sock-
et Service Request Switches are being used.)
4. Go to 10-5-6 Network Connection Problems on page 203.
Section 10-5
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