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b.Send request
START
Does the SEND instruction
complete?
Yes
Is the station status such that run + socket transmission is enabled?
Yes
Is the transmission destination IP address set to that of the remote Ethernet Port?
Yes
Are the UDP ports on the local and
remote ports opened?
Yes
Does the status indicate normal
completion?
Yes
Does a response come back if a
ping is issued to the remote
No | Verify the status using the procedure described in | |
the item 3 " If a SEND or RECV instruction fails | ||
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| complete" on page 148. | |
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No | Set the Ethernet Port to run + socket | |
transmission enabled using an operating mode | ||
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| control request. | |
No |
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Verify the remote Ethernet Port transmission | ||
| destination IP address. | |
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No | Open UDP ports on the local port and remote | |
| ports. | |
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No |
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Resolve the problem by referring to the status. | ||
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No | 1. Recheck the remote port IP address and | |
message transmission UDP port numbers. | ||
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Ethernet Port?
Yes
Is the error counter read out from the RAS information constant (i.e.,
No
2.Verify that there is no router on the network.
3.Check the network verification items.
It is possible that there is an abnormality on the
not being incremented)?
(Use RAS information readout to
determine this.)
Yes
END
network itself. Check the network verification items.
RAS error counters: Alignment error:
Short packet
CRC error
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