6 F 3 B 0 3 6 2
6.If PC link protocol transmission fails
a.Main port side Ethernet Port
START
Does the SEND/RECV instruction
complete?
Yes
Was there a response timeout?
(TermSTS = 02H)
Yes
No | Verify the status using the procedure described in the | |||||
item 3 " If a SEND or RECV instruction fails complete" | ||||||
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No | Is the station status such that | |||||
run + message transmission is |
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| enabled? |
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| Yes |
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| No | ||
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Check the status and |
| Set the Ethernet Port to run + message | ||||
resolve the error. |
| transmission enabled using an | ||||
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| operating mode control request. | |||
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Is the transmission destination IP address set to that of the slave Ethernet Port?
Yes
Is the slave port message
transmission UDP port correct?
Yes
Does a response come back if a ping is issued to the slave Ethernet Port?
Yes
No | Verify the slave Ethernet Port transmission destination | |
| IP address. | |
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| Verify the slave Ethernet Port message transmission | |
No | UDP port number. | |
Supplement: | ||
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| Remember that there are separate send and |
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| receive ports that each have their own message |
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| transmission UDP port number. |
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| 1. | Recheck the slave port IP address and message |
No |
| transmission UDP port numbers. |
| 2. | Verify that there is no router on the network. |
| 3. | Check the network verification items. |
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Is the error counter read out from the RAS information constant (i.e.,
No
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
⎯ 153 ⎯
