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1 MULTIPLE CPU SYSTEM
1.1 Multiple CPU System
■MELSEC Q series modules
MELSEC Q series modules cannot be controlled with the Motion CPU. If the Motion CPU is specified as the MELSEC Q
series module control CPU, a moderate error (error code: 2020H) is detected when turning ON the Multiple CPU system
power supply, and the module cannot be accessed.
Module access range from non-controlling CPU
• Access to MELSEC Q series modules controlled by other CPU is not possible from Motion CPU. (I/O reading from outside
the group is also not performed.)
• Module access devices (U\G) can be read. An error (error code differs for each function) is output when attempting to
write.
• X/Y devices for modules controlled by another CPU can be refreshed to a Motion X/Y with the I/O settings for outside the
group. However, I/O reading from outside the group is not performed for modules controlled by other CPUs that apply to
inter-module synchronization.
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