Mitsubishi MELSEC-F User Manual page 142

7 FIXED BUFFER COMMUNICATION (WITH THE NO PROCEDURE
CONTROL METHOD)
7
7 - 2
(2) Data can be communicated with the following external devices.
• Device on the Ethernet to which the Ethernet module is connected.
• Devices connected with the router relay function (see Section 5.3)
As shown in the diagram below, when using each fixed buffer (No. 1 to 8), the
destination devices and usage conditions (for sending/receiving, procedure
exist/no procedure, etc.) should be set when the connection via the Ethernet
module is opened to fix the external device for each buffer.
(a) At TCP/IP communication
It is allowed to change external devices only when the open completion
signal of the applicable connection is off.
(b) At UDP/IP communication
External devices can be changed regardless of the status of the applicable
connection.
("Destination IP address" and "Destination Port No." in the communication
address setting area can be changed. However, "Local station Port No."
cannot be changed.)
When changing external devices, do not use the "Pairing open" and
"Existence confirmation" functions.
For sending to external
Fixed buffer No. 1
device 1
For receiving from external
Fixed buffer No. 2
device 1
For receiving from external
Fixed buffer No. 3
device 8
For sending to external
Fixed buffer No. 8
device 28
POINT
The connections for which no procedure is selected are dedicated to the fixed
buffer sending or receiving after the completion of open processing.
MELSEC-F
External device 1
External device 8
External device 28
7 - 2