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MELSEC-Q
2 SYSTEM CONFIGURATION AND AVAILABLE FUNCTIONS
2.5 Use with Redundant CPUs
This section describes the Q series C24 on an extension base unit of the system
where Redundant CPUs are used.
(1) Available functions
For details, refer to the QnPRHCPU User’s Manual (Redundant System).
(2) Access to Redundant CPU from external device
For details, refer to either of the following manuals.
• Section 5.1.4
• QnPRHCPU User's Manual (Redundant System)
(3) Dedicated instructions
The dedicated instructions are not applicable.
Create programs with the FROM/TO instructions.
For sample program using the FROM/TO instructions, refer to the QnPRHCPU
User’s Manual (Redundant System).
(4) GX Configurator-SC
(a) Connecting GX Configurator-SC
GX Configurator-SC cannot be used for accessing a Redundant CPU via
an intelligent function module on an extension base unit from GX Developer.
Therefore, the pre-defined protocol communication is not available.
Connect a personal computer with a communication path indicated below.
2
1
Main base unit
Extension base unit
1 2
Direct connection to the CPU
Connection through an intelligent function module on the main base unit
(Through Ethernet module, MELSECNET/H module, or CC-Link module)
(GX Configurator-SC cannot be used.)
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