Mitsubishi Electric MELSEC iQ-R-R00CPU, User Manual

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16 MULTIPLE CPU SYSTEM FUNCTION
16
MULTIPLE CPU SYSTEM FUNCTION
With multiple CPU modules mounted on the base unit, each of the CPU modules controls their own assigned I/O modules and
intelligent function modules. In addition, the CPU modules communicate with each other.
• For details on the concept of the multiple CPU system configuration specification (System configuration
specifications such as the mounting position of the CPU modules and assignment of CPU number/IO
number), refer to the MELSEC iQ-R Module Configuration Manual.
• For the start-up (Setting, operating procedures, etc) of the Multiple CPU system, refer to the GX Works3
Operating Manual.
• The startup time of the multiple CPU system may be slowed, depending on the configuration of installed
modules, boot operation, functions performed before CPU modules enter into the RUN state (e.g. setting of
initial device/label values), the configuration of system parameters and CPU parameters (e.g. the number of
programs to run).
• When diagnostics of the SD memory card is performed due to operation such as power-off during access to
the SD memory card, the startup time of the multiple CPU system may be slowed.
• Create a program so that only one CPU module accesses the Q series module, if possible. If multiple CPU
modules access the Q series module simultaneously, the scan time (including the execution processing of
interrupt programs) may be extended due to access waiting time.
• Before using the multiple CPU system function with the RnENCPU, check the versions of the CPU module
and engineering tool used. (

Page 1008 Added and Enhanced Functions)
• When using the Safety CPU, refer to the following as well.
 Page 535 FUNCTIONS
RnCPU RnENCPU
RnPSFCPU RnPSFCPU RnSFCPU RnSFCPU RnPCPU RnPCPU
(Standard) (Safety) (Standard) (Safety) (Redundant) (Process)