Omron SYSMAC CP Series, User Manual

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15 Ethernet
15-44
CP2E CPU Unit Software User’s Manual(W614)
z
TCP Socket Services
Note W: Written by user
RW: Written by user at execution and then read for results at completion
R:
Read by user for results at completion
n---: Not used.
z
Socket Option
For the TCP OPEN REQUEST (ACTIVE or PASSIVE) command, specifies whether or not the keep-
alive function is to be used. When the keep-alive function is used, bit
8 is ON.
z
UDP/TCP Socket No.
Specify the number of the UDP or TCP socket to open.
z
Local UDP/TCP Port No.
Specify the number of the UDP or TCP port for the socket to use for communications.
• Do not specify the port being used as the FINS UDP port (default: 9600) in an open request for a
UDP socket.
• Do not specify the port being used as the FINS TCP port (default: 9600) in an open request for a
TCP (active or passive) socket.
• Do not specify auto connection UDP port number 9600 in an open request for a UDP socket.
• Do not specify auto connection TCP port number 9600 in an open request for a TCP (active or
passive) socket.
• As a rule, use port numbers 1,024 and higher.
If port number 0 is specified when for an active TCP open, the TCP port number will be automati-
cally allocated and the number of the port that was opened will be stored in the local UDP/TCP port
number in the Socket Service Parameter Area (i.e., the actual port number will be overwritten on the
value of 0 set by the user).
Parameter No. of
words
Range
(decimal values in parentheses)
Socket service
TCP
passive
open
TCP
active
open
TCP
receive
TCP
send
TCP
close
Socket option 1 Specified bit W W --- --- ---
UDP/TCP socket
No. 0001 to 000 3 hexadecimal
(1 to 3 )
W W W W W
Local UDP/TCP port
No. 1 0000 to FFFF hexadecimal
(0 to 65,5
3 5)
W RW --- --- ---
Remote IP address 2 00000000 to FFFFFFFF
hexadecimal
(0.0.0.0 to 255.255.255.255) RW W --- --- ---
Remote UDP/TCP
port No. 1 0000 to FFFF hexadecimal
(0 to 65,5
3 5)
RW W --- --- ---
Number of bytes to
send/ receive 1 0000 to 04D0 hexadecimal
(0 to 1,024 bytes) --- --- RW RW ---
Send/Receive data
address 2 Memory area address --- --- W W ---
Time out time (Unit:
100 ms) 1 0000 to FFFF hexadecimal
(0 to 65,5
3 5)
(0: No limit, 0.1 to 6,55 3 .5 s)
W --- W --- ---
Response code 1 --- R R R R R
Parameters