Omron CS1W-ETN21 - Manual (Page 214)

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Command/Response Reference Section 7-3
7-3-25 PROTOCOL STATUS READ
Reads the Ethernet Unit protocol status.
Command Block
Response Block
Parameters
IP Status (Response) Twelve types of IP status information occupying 4 bytes each are returned in
the following sequence. Each value is returned as an 8-digit hexadecimal
value.
1,2,3... 1. Total number of IP packets received.
2. The number of IP packets discarded due to an error with the checksum in
the packet header.
3. The number of IP packets discarded because the received packet was
larger than the overall packet length value in the packet header.
4. The number of IP packets discarded because the minimum size of the IP
header data could not be stored in the first short buffer (See note.) when
an attempt was made to store the packet. Refer to 7-3-26 MEMORY STA-
TUS READ and Appendix B Buffer Configuration.
5. The number of packets discarded for one of the following reasons:
• The IP header length value in the IP header was smaller than the
smallest size of the IP header.
• The size of the first short buffer (See note.) was smaller than the IP
header length value in the IP header when storing the packet.
6. The number of IP packets discarded because the IP header length was
larger than the overall packet length value in the packet header.
7. The number of fragmented packets received.
8. The number of received fragmented IP packets discarded because a
queue for reassembly could not be secured.
9. The number of fragmented IP packets discarded because they could not
be reassembled within 12 seconds after being received.
10. Always 0.
11. The number of packets addressed to other networks that have been dis-
carded.
12. Always 0.
Note Refer to 7-3-26 MEMORY STATUS READ for details on the short buffer.
27 62
Command
code
27 62
IP status ICMP status TCP status UDP status Response
code
Command
code
48 bytes 184 bytes 184 bytes 12 bytes