4.1 Replace MELSECNET(ΙΙ) with MELSECNET/10
• MELSECNET/H (twisted bus type) is compatible with Q Series CPUs only.
All A Series CPUs connected to the existing MELSECNET/B need to be upgraded to Q Series CPUs at once.
• MELSECNET/H (twisted bus type) is compatible with PLC to PLC network only. It is not compatible with
remote I/O network.
To replace MELSECNET/B with MELSECNET/H (remote I/O network), use optical loop system or coaxial
Or, replace MELSECNET/B with MELSECNET/H (PLC to PLC network) and remote I/O stations with normal
stations. (Refer to Section 4.3)
• For details on Q Series CPU type to which MELSECNET/H network module (twisted bus type: QJ71NT11B)
can be mounted, number of mountable modules per CPU, and network parameter settings, refer to the
"Q corresponding MELSECNET/H Network System Reference Manual (PLC to PLC network)" : SH-080049
• MELSECNET/H (twisted bus type) can use CC-Link cables. The maximum communication speed of the
network is 10 Mbps.
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