Omron CS1W-ETN21 Status of UDP/TCP Sockets 1 to 8 Ethernet Unit to CPU Unit, Opening Flag Bit

CIO Area Allocations Section 4-1

Status of UDP/TCP Sockets 1 to 8 (Ethernet Unit to CPU Unit)

15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0

n+1 to n+16

Data Received Flag

Results Storage Error Flag

TCP/UDP Open Flag

Opening Flag

Receiving Flag

Sending Flag

Closing Flag

Bit	Flag	Status	Manipulated	Unit operation	Reference
			by
0	Opening Flag	ON	Unit	ON during open processing. (Turns	Operation Manual, Con-
				ON when open request is received.)	struction of Applica-
					tions, SECTION 6
		OFF	Unit	OFF when open processing has
				been completed.
1	Receiving Flag	ON	Unit	ON during receive processing.
				(Turns ON when receive request is
				received.)
		OFF	Unit	OFF when receive processing has
				been completed.
2	Sending Flag	ON	Unit	ON during send processing. (Turns
				ON when send request is received.)
		OFF	Unit	OFF when send processing has
				been completed.
3	Closing Flag	ON	Unit	ON during close processing. (Turns
				ON when close request is received.)
		OFF	Unit	OFF when close processing has
				been completed.
4 to 12	(Not used.)	---	---	---	---
13	Data Received Flag	ON	Unit	ON when data from a remote node	Operation Manual, Con-
				has been received at an open TCP	struction of Applica-
				socket.	tions, SECTION 6
		OFF	Unit	OFF when receive processing has
				been requested for an open TCP
				socket.
14	Results Storage	ON	Unit	ON if there is an error in storing the
	Error Flag			results when socket services are
				used by means of the CMND(490)
				instruction.
		OFF	Unit	Turns OFF when the next request is
				received. (Connected by TCP.)
15	TCP/UDP Open	ON	Unit	ON when open processing has been
	Flag			completed.
		OFF	Unit	OFF when close processing has
				been completed. (Stays OFF for
				abnormal open processing comple-
				tion.)

Note The status of these flags can also be checked using the software switch set- tings on the CX-Programmer.

Opening Flag (Bit 0)

Turns ON when an open request is received either by control bit manipulation or the CMND(490) instruction, and turns OFF again when the open process- ing has been completed. When CMND(490) is used, the Results Storage Error Flag (bit 14) will turn ON at the same time as the Opening Flag turns OFF if there is an error in the Results Storage Area designation.

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