Mitsubishi Electric Q03UDVCPU User Manual page 208

(3) Differences between the socket communication and the nonprocedural
communication using a fixed buffer of the Ethernet module
Item QJ71E71-100
ZP.OPEN
ZP.CLOSE
Instruction name ZP.BUFRCV
Z.BUFRCVS
ZP.BUFSND
When sending or receiving
data using one
Pairing open not connection, two
necessary connections are occupied
by the pairing open
setting.
Select whether UDP and
TCP-Full/Unpassive open
Automation of UDP
is performed by the initial
and TCP-
timing setting parameter
Full/Unpassive open
automatically or by an
instruction.
Data sending
method on TCP Select whether to enable
when the message TCP Maximum Segment
size exceeds 1460 Size Option transmission
bytes in the buffer memory.
(TCP Maximum (Default: "Disable TCP
Segment Size Maximum Segment Size
Option Option transmission")
transmission)
Connection
Performed by reading from
information
or writing to the buffer
acquisition and
memory.
setting methods
Activation of an An interrupt program can
interrupt program in be activated during data
data receiving receiving.
The following numbers
cannot be used as host
Host station port
station port number.
number
1388 to 138A
H
5002)
Select whether to perform
Specification of alive
alive check of TCP/IP and
check
UDP/IP using parameters.
Ethernet address (MAC
Ethernet address
address) of the external
specification using
device can be specified
the OPEN
using the ZP.OPEN
instruction
instruction.
Maximum
communication data 2046 bytes
size
206
Built-in Ethernet port
QCPU
SP.SOCOPEN
SP.SOCCLOSE
SP.SOCRCV
S.SOCRCVS
SP.SOCSND
When sending or receiving
data using one
connection, pairing setting
is not used.
UDP and TCP-
Full/Unpassive open is
automatically performed.
"Enable TCP Maximum
Segment Size Option
transmission"
Performed using socket
function instructions.
An interrupt program
cannot be activated during
data receiving.
The following numbers
cannot be used as host
station port number.
(5000 to 1388 to 1391 (5000 to
H H H
5009)
Alive check for TCP/IP is
performed by default.
Alive check for UDP/IP is
not available.
Ethernet address (MAC
address) of the external
device cannot be
specified.
• Serial number (first 5
digits) is "12051" or
earlier: 2046 bytes
• Serial number (first 5
digits) is "12052" or
later: 10238 bytes
Consequence of a
communication with
the Built-in Ethernet
port QCPU
- Replace the instruction name.
Set only one connection by parameter.
When connection No. of the instruction is
- the same as the second connection No. of
pairing open, replace it with the first
connection No.
Delete the instructions for open and close
-
for UDP and TCP-Full/Unpassive.
When communications with
the QJ71E71-100 are used
for a CPU module which
performs TCP
Perform the procedure indicated in Page
communications with an
104, Section 7.3 (7) so that the external
external device with the
device can process split data.
message size over 1460
bytes, the external device
may not correctly read split
data.
Replace the information acquisition and
- setting methods with the SP.SOCCINF or
SP.SOCCSET instruction.
Program the data receiving processing at
-
the beginning of the scan program.
- Change the port number.
- As described in the left columns.
Specify "0" for the Ethernet address. (No
specification is required. The Ethernet
-
address is automatically acquired for
communication.)
-
Action
-