Omron CS1W-ETN01, Operation Manuals

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6-2 Section Using Socket Services with Socket Service Request Switches
105
6-2-4 UDP/TCP Socket Status
The status of the UDP and TCP sockets is provided in the Socket Status Words
shown in the following diagram. There is a status word for each socket for both
UDP and TCP. The Socket Status Words are allocated in the CPU Bus Unit Area
in the CPU Area starting at the the word n+ 1. The value of n can be calculated
from the unit number as follows:
n = 1500 + (25 x unit number)
UDP Socket No. 1 Status
TCP Socket No. 1 Status
TCP Socket No. 2 Status
TCP Socket No. 3 Status
TCP Socket No. 4 Status
TCP Socket No. 5 Status
TCP Socket No. 6 Status
TCP Socket No. 7 Status
TCP Socket No. 8 Status
UDP Socket No. 2 Status
UDP Socket No. 3 Status
UDP Socket No. 4 Status
UDP Socket No. 5 Status
UDP Socket No. 6 Status
UDP Socket No. 7 Status
UDP Socket No. 8 Status
n+1
n+2
n+3
n+4
n+5
n+6
n+7
n+8
n+9
n+10
n+11
n+12
n+13
n+14
n+15
n+16
15 8 7 0
The flags shown in the following diagram are provided in the Socket Status
Words for socket service requests made with the Socket Service Request
Switches.
Opening Flag
Receiving Flag
Sending Flag
Closing Flag
TCP/UDP Open Flag
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Bit Switch Status Manipulated
by
Unit operation
0 Opening Flag ON Unit Turns ON when an open request is received.
OFF Turns OFF when open processing has been completed.
1 Receiving Flag
ON Turns ON when a receive request is received.
OFF Turns OFF when receive processing has been completed.
2 Sending Flag ON Turns ON when a send request is received.
OFF Turns OFF when send processing has been completed.
3 Closing Flag
ON Turns ON when an close request is received.
OFF Turns OFF when close processing has been completed.
15 Socket Open Flag
ON Turns ON when open processing has been completed (i.e., when
a connection is made).
OFF Turns OFF when close processing has been completed. (Will
remain OFF when open processing ends in an error.)
Note The TCP socket connection status is also provided as codes in the following
words of the words allocated to the Ethernet Unit in the CPU Bus Unit Area in the