Справочник Пользователя для Omron CS1W-ETN11

16. The number of window probe packets received. 

17. The number of resent ACK packets received.

18. The number of ACK packets received with no data set. 

19. The number of ACK packets received.

20. The number of ACK packets received for received transmission acknowl-

edgements (ACK).

21. The number of window advertisement packets received. 

Three items of UDP information occupying 4 bytes each are returned in the
following sequence. Each value is returned as an 8-digit hexadecimal value.

1.

The number of packets discarded because the size of the first short buffer
was smaller than the minimum size (28) of the IP header and UDP header
when the packet was stored.

2.

The number of packets discarded due to an incorrect checksum in the UDP
header.

3.

The number of packets discarded because the IP overall length in the IP
header was shorter than the UDP overall length in the UDP header. 

All the above values are set to 0 if network operation stops due to incorrect
settings in the system setup. 

Counting will be stopped when a count reaches the maximum value. The
maximum values are as follows:

IP, ICMP, or UDP status: 7FFFFFFF (2,147,483,647 decimal)
TC status:

FFFFFFFF (4,294,967,295 decimal)

Reads the status of the Ethernet Unit’s network memory. The network mem-
ory contains 196K bytes that are used as required as for communications
buffers for communications servicing. The network memory consists of 1,056
short buffers (128 bytes each) and 64 long buffers (1,024 bytes each). Refer
to Appendix C Buffer Configuration.

A total of 23 data items in six areas are returned in the following order. Each
item consists of 4 bytes.

1.

Short Buffer Application: Two items are returned (8 bytes).

a) The number of short buffers currently being used.

b) The number of short buffers in the system (fixed at 1,056 decimal).

0000

Normal

1001

Command too large

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27

Command 
code

92 bytes

Command 
code

Response 
code

Memory 
status

27

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