Appendix D: Differences with FX3U-ENET
143
FX3U-ENET-ADP User's Manual
B
Version
Information
C
Program
Examples
D
Differences with
FX
3U
-ENET
E
Document,
others
Appendix D: Differences with FX3U-ENET
The table below shows major differences between the FX3U-ENET-ADP and the FX3U-ENET.
: Supported : Not supported
Item Summary FX3U-ENET-ADP FX3U-ENET
Communication
Using MC Protocol
A-compatible 1E
frame subset
Reading/writing data on the PLC main unit from/to
external devices (The frame method is compatible
with the A Series E71.)
Connection with MELSOFT products
Connecting MELSOFT products through TCP/IP
communication (Two or more MELSOFT products can
be connected at the same time.)
Fixed buffer communication
Sending/receiving arbitrary data to/from external
devices.
E-mail
Send
Sending/receiving data using E-mails.
Receive
Direct connection to MELSOFT
(Simple Connection)
Enabling direct connection (simple connection) to an
MELSOFT product with only one Ethernet cable not
via the hub (In direct connection, communication is
enabled only by specifying the connection destination
without setting the IP address.)
Find CPU function
Searching for PLC main units connected to the same
hub as MELSOFT, and displays the list of found PLC
main units.
Time setting function
Accessing the time information server (SNTP server)
connected on the LAN, collecting the time information,
and automatically setting the time to the PLC main
unit.
(SNTP server is
required)
Router relay communication
(router relay function)
Communicating via the router and gateway (In the
router relay function, the Ethernet adapter/unit does
not work as a router.)
For user
connection
Connection
number
User connection used for communication using the
MC protocol and communication by MELSOFT
connection (The application is set by parameters.)
Total of 4 connections
MELSOFT connection +
MC protocol <= 4
Total of 8 connections
Fixed buffer
communication <= 8
MELSOFT connection +
MC protocol <= 4
Parameter setting Providing various settings required for communication.
PLC Parameters of
GX Works2
Sequence program
(BFM setting),
FX Configurator-EN
Parameter storage Where set parameters are stored.
Parameter area of the
main unit
Built-in flash memory of
the FX
3U-ENET
Data transfer rate Ethernet communication speed. 100Mbps/10Mbps 100Mbps/10Mbps
Send frame format
Ethernet (V2.0)
Specifying the Ethernet header frame format for data
link layer.
IEEE802.3
External device
existence check
(Existence
confirmation
function)
Confirmation by
PING
Sending the PING message (ICMP echo) for checking
the existence to an external device, and closing the
corresponding connection if response is not given.
Confirmation by
KeepAlive
Confirming that the connection opened by the TCP
protocol remains established (open) by sending the
ACK message for confirmation to an external device
and waiting for response.
(Interval time 5 seconds,
8 retry count anchoring)
Corresponding PLC Connectable PLC. FX
3U/FX3UC FX3G/FX3U/FX3UC
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