Specifications

4 - 4
(2) Additional functions of the Ethernet module
The following table lists the additional functions of the Ethernet module that can be
used.
Function Description Reference section
MELSECNET/H, MELSECNET/10
relay communication
In a network system on which Ethernet and,
MELSECNET/H or MELSECNET/10, coexist, or in a
network system that relays multiple Ethernets, data
communication is performed via multiple number of
such networks.
Q Corresponding
Ethernet Interface
Module User's Manual
(Application)
Router relay communication (router
relay function)
Performs data communication via a router or gateway.
(The router relay function is not a function by which the
Ethernet module works as a router.)
Chapter 8
Existence check of external device
(Existence / check function)
Checks whether or not the external device is working
normally after a connection is established (open
processing).
Communication via pairing open
Pairs and then opens a reception connection and a
transmission connection. (For fixed buffer)
Communication via automatic open
UDP port
Enables communication after the station in which an
Ethernet module is mounted has been started.
(Open/close processing by the sequence program is
not required.)
Remote password check
Prevents unauthorized access by a remote user to a
QCPU.
Simultaneous broadcast
Sends/receives data for all external devices on the
same Ethernet as the Ethernet module is on in the data
communication using UDP/IP. (Simultaneous
broadcast)
Q Corresponding
Ethernet Interface
Module User's Manual
(Basic)
(3) Status check of the Ethernet module
Whether the Ethernet module is working normally and whether it can
communicate normally are checked.
Function Description Reference section
Self refrain test
Checks the Ethernet module's sending/receiving
function and line connection status.
Section 4.7.1
Hardware test Tests the RAM and ROM of the Ethernet module. Section 4.7.2
Communication error storage
When a data communication error occurs, this function
stores the error information (error log), including the
message subheader and the IP address of the external
device for a maximum of 16 pairs in the buffer memory.
Q Corresponding
Ethernet Interface
Module User's Manual
(Basic)