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From the Microsoft? Windows?7’s Internet Protocol Version 4 Properties, uncheck “Obtain an IP address automatically” option and set an arbitrary IP address that does not duplicate with the address of MELSEC iQ-F.

Also, if the subnet mask is, the first three values (first – third octets) must match the iQ-F’s IP address.
*:The IP address of MELSEC iQ-F is and for subnet mask。
As well, the security software (antivirus software) may be blocking the Ethernet communication.
Check if communication is enabled by temporarily disabling the security software or by authorizing communication through the security software settings.