Omron CP1L-EL20DR-D Operation Manual page 231

Socket Services
Bit Flag
0 Opening Flag
1 Receiving Flag
2 Sending Flag
3 Closing Flag
4 to 12 (Not used.)
13 Data Received Flag ON
14 Results Storage
Error Flag
15 TCP/UDP Open
Flag
Note
Socket Service Request
Switches 1 to 3
Status Manipulated
by
ON Unit ON during open processing. (Turns
ON when open request is received.)
OFF Unit OFF when open processing has
been completed.
ON Unit ON during receive processing.
(Turns ON when receive request is
received.)
OFF Unit OFF when receive processing has
been completed.
ON Unit ON during send processing. (Turns
ON when send request is received.)
OFF Unit OFF when send processing has
been completed.
ON Unit ON during close processing. (Turns
ON when close request is received.)
OFF Unit OFF when close processing has
been completed.
--- --- ---
Unit ON when data from a remote node
has been received at an open TCP
socket.
OFF Unit OFF when receive processing has
been requested for an open TCP
socket.
ON Unit ON if there is an error in storing the
results when socket services are
used.
OFF Unit Turns OFF when the next request is
received.
ON Unit ON when open processing has been
completed.
OFF Unit OFF when close processing has
been completed. (Stays OFF for
abnormal open processing comple-
tion.)
Do not forcibly manipulate the above status flags during socket service is
used.
15 14 13
7 6 5
A571 to A572
Unit operation
12 11 10 9 8
4 3 2 1 0
UDP Open Request Switch
TCP Passive Open Request Switch
TCP Active Open Request Switch
Send Request Switch
Receive Request Switch
Close Request Switch
Section 6-6
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