Omron CS1W-ETN21 operation manual Memory Status Read, Precautions

Command/Response Reference Section 7-3

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.

UDP Status (Response) 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.

1,2,3... 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.

Precautions

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)
Response Codes
	Response code	Description
	0000	Normal
	1001	Command too large

7-3-26 MEMORY STATUS READ

Reads the status of the Ethernet Unit’s network memory. The network mem- ory contains 248K bytes that are used as required as for communications buffers for communications servicing. The network memory consists of 1,472 short buffers (128 bytes each) and 64 long buffers (1,024 bytes each). Refer to Appendix B Buffer Configuration.

Command Block

27 63

Command code

Response Block

27 63

92 bytes

Command	Response Memory status
code	code

193