Mitsubishi Electric MELSEC iQ-R Series User Manual page 51

Considerations for direct connection
■Connecting to a LAN line
Do not perform communication by connecting to a LAN line directly.
This may increase the line load and affect the communications of other devices.
■Connections which are not direct connections
Do not set the direct connection in a configuration where a single OPC UA server module is connected to a single
configuration personal computer via a hub as shown in the following figure.
(2)
(1)
(1) OPC UA server module
(2) Ethernet (twisted pair cable)
(3) Hub
(4) Configuration personal computer
■Conditions where communication cannot be established directly
If the following condition is satisfied, communication by direct connection may not be established. In that case, review the
settings of the OPC UA server module and configuration personal computer.
• When all bits of the IP address of an OPC UA server module that correspond to the '0' parts of a configuration personal
computer subnet mask are ON or OFF
Ex.
IP address of an OPC UA server module: 64.64.255.255
IP address of a Configuration personal computer: 64.64.1.1
Subnet mask on a configuration personal computer: 255.255.0.0
• When all bits of the IP address of an OPC UA server module that correspond to the host address for each class of the IP
address of a configuration personal computer are ON or OFF
Ex.
IP address of an OPC UA server module: 64.64.255.255
IP address of a Configuration personal computer: 192.168.0.1
Subnet mask on a configuration personal computer: 255.0.0.0
• The IP addresses of each class are as follows:
Class A: 0.x.x.x to 127.x.x.x, Class B: 128.x.x.x to 191.x.x.x, Class C: 192.x.x.x to 223.x.x.x
• The host address for each class is the following '0' part.
Class A: 255.0.0.0, Class B: 255.255.0.0, Class C: 255.255.255.0
■Other considerations
● When the Windows firewall setting of a configuration personal computer is enabled
Disable the Windows firewall setting.
● When multiple IP addresses are enabled in a configuration personal computer
In the configuration where multiple IP addresses are enabled at the same time as shown below, do not set the setting for
direct connection.
• An IP address is assigned to each Ethernet port of the configuration personal computer with multiple Ethernet ports.
• The wireless LAN setting is enabled in addition to the Ethernet port of an configuration personal computer.
• Multiple IP addresses are assigned to one network device (Ethernet port) of a configuration personal computer.
(3)
(2)
(4)
5 SYSTEM CONFIGURATION
5.1 System Configuration
5
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