Omron CS1W-ETN21 operation manual Socket Applications, Format

Socket Applications			Section 7-2
	The MRES codes are shown in the following table along with the results they
	indicate. Refer to 8-5 Troubleshooting with Response Codes for details on
	response codes including the SRES.
	MRES	Execution results
	00	Normal completion
	01	Local node error
	02	Remote node error
	03	Unit error (controller error)
	04	Service not supported
	05	Routing error
	10	Command format error
	11	Parameter error
	22	Status error
	23	Operating environment error
	25	Unit error

7-2	Socket Applications
		The format of the following FINS commands partially differs when the sockets
		are used.
		Command code		Name	Page
		MRC	SRC
		27	01	UDP OPEN REQUEST	167
			02	UDP RECEIVE REQUEST	168
			03	UDP SEND REQUEST	169
			04	UDP CLOSE REQUEST	171
			10	PASSIVE TCP OPEN REQUEST	172
			11	ACTIVE TCP OPEN REQUEST	174
			12	TCP RECEIVE REQUEST	177
			13	TCP SEND REQUEST	178
			14	TCP CLOSE REQUEST	180
7-2-1	Format

The basic format of these commands is shown in the diagram below.

	0 1 2 3 4 5 6 7 8				9 10 11 12	Number of bytes from
						the beginning of the frame
	Command			Results storage area	Parameters
	code
			Socket number
		Socket option
Command Code	Specifies the requested process.
Socket Option	For the TCP OPEN REQUEST (ACTIVE or PASSIVE), specifies whether or
	not the keep-alive function is to be used. For all other commands it is dis-
	abled. (Set to 0).
Socket Number	Specifies the socket number for which the process is requested, from 1 to 8.
Results Storage Area	Specifies the area to store the results of the requested process.

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