Omron CJ1W-ETN21 operation manual Socket Services

SECTION 6

Socket Services

This section describes the functionality provided by the Ethernet Unit via the socket services.

6-1 Overview of Socket Communications from Ethernet Units			99
	6-1-1	What are Sockets?	99
	6-1-2	Socket Port Numbers	99
6-2	Protocol Overview		100
	6-2-1 Differences between TCP and UDP		100
	6-2-2	Opening TCP Sockets	100
	6-2-3 Fragmentation of Send Data		102
6-3	Overview		103
	6-3-1	Socket Service Functions	103
	6-3-2 Using Socket Services with Socket Service Request Switches . . . .		104
	6-3-3 Using Socket Services with CMND(490)		105
	6-3-4 Specific Socket Service Functions		105
	6-3-5 Differences with Previous Models		106
6-4 Socket Service Function Guide			106
	6-4-1 Manipulating Dedicated Control Bits		106
	6-4-2	Executing CMND(490)	106
6-5 Using Socket Service Functions			107
	6-5-1	Procedure	107
	6-5-2 Settings Required for Socket Service Function		107
	6-5-3	Setup Tab	108
6-6	Socket Service Status		110
	6-6-1	CIO Area Allocations	110
	6-6-2	DM Area Allocations	111
6-7 Using Socket Services by Manipulating Dedicated Control Bits			112
	6-7-1	Application Procedure	112
	6-7-2 Socket Services and Socket Status		113
	6-7-3	Socket Service Parameters	115
	6-7-4	Parameters	117
	6-7-5 Socket Service Request Switches		119
	6-7-6	Response Codes	120
	6-7-7	Timing Charts	125
	6-7-8 TCP/IP Communications Programming Example		127
	6-7-9 UDP/IP Communications Programming Example		131

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