7
COMMUNICATION USING BUILT-IN ETHERNET
PORTS OF CPU MODULE
7.3 GX Developer Direct Connection (Simple Connection)
7 - 11
1
Overview
2
Performance
Specification
3
Sequence Program
Configuration and
Execution Conditions
4
I/O Nunber Assignment
5
Memories and Files
Handled by CPU Module
6
Functions
7
Communication using
built-in Ethernet ports of
CPU module
8
Communication with
Intelligent Function
Module
1) Select "Ethernet board" for "PC side I/F".
2) Select "PLC module" for "PLC side I/F".
Check the "Ethernet port direct connection" checkbox on the detailed setting
screen as shown in Figure 7.15.
3) Make the setting for "Other station".
(b) Precautions
1) When the CPU module is connected to LAN line, do not perform
communication using direct connection. If performed, the communication may
put a load to LAN line and adversely affect communications of other devices.
2) If the "Disable direct connection to MELSOFT" checkbox is checked on the
Built-in Ethernet port tab of PLC parameter in GX Developer, the direct
connection is not available.
3) The system configuration that connects a Built-in Ethernet port QCPU with an
external device using a hub as shown in Figure 7.16 is not regarded as direct
connection since the hub is used. Do not check the "Ethernet port direct
connection" checkbox on the detailed setting screen.
4) Under the following conditions, direct connection communication may not be
available. In that case, check the setting of the CPU module and/or personal
computer.
• In the CPU module IP address, bits corresponding to "0" in the personal
computer subnet mask are all ON or all OFF.
[Example] CPU IP address: 64.64.255.255
Personal computer IP address: 64.64.1.1
Personal computer subnet mask: 255.255.000.000
• In the CPU module IP address, bits corresponding to the host address for
each class in the personal computer IP address are all ON or all OFF.
[Example] CPU module IP address: 64.64.255.255
Personal computer IP address: 192.168.0.1
Personal computer subnet mask: 255.255.000.000
Figure 7.15 PLC side I/F Detailed setting of PLC module screen
Figure 7.16 Non-direct connection
Ethernet cable
Hub
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