Omron CS1W-ETN21 operation manual Fins Communications Problems SEND090/RECV098/ CMND490

Troubleshooting Procedures Section 8-4

8-4-2 FINS Communications Problems (SEND(090)/RECV(098)/ CMND(490))

FINS Communications Problems occurred.

Refer to 8-5 Troubleshooting with Response Codes and remove any causes of the problem discovered there before proceeding with this procedure.

Is the control data	Y
for the instruction set
incorrectly?
N

Is a CMND(194)

Yinstruction being addressed to the local node, e.g. for socket services?

N

Are different UDP port numbers set for FINS communications for both

the local node and the Y remote node?

N

Make sure that the FINS network address is not set to 0 for the Ethernet Unit and check the network address, node number and unit address.

Set the same port number for both nodes.

Are the local and remote

nodes both on the same N network, i.e. do they have the

same network number in their

IP addresses?

Y

Set the IP address of the remote node in the IP address table or use automatic address conversion.

Is the IP address	Y
of the remote node missing from
the IP address table?
N
Is the IP address	Y
of the remote node
missing from the IP
router table?

N

IP routing must be used if the net ID of the IP address of the local node and remote node. 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.)

(Note: The automatic generation setting cannot be used alone.)

Set the network number of the remote node in the IP router table.

		Are the FINS network	Y
		addresses of the local and
		remote nodes different?
		N	Y
		Are you attempting
	N	a broadcast transmission?
Are you attempting to		Are the routing	Y
communicate with a PLC on		tables set improperly?
another network?

Y

Go to Network

Connection Problems

Set both nodes to the same FINS network address.

Do not attempt to broadcast to a node with a different network number. You can broadcast only to nodes on the same IP network.

Set routing tables at the local node, target node, and any relay nodes.

E N D

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