Mitsubishi Electric Q12DCCPU-V - Access to Link Devices

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12.5 Access to Link Devices
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CONCEPT OF MULTIPLE CPU SYSTEM
12.5 Access to Link Devices
Only the control CPU can access link devices of CC-Link IE controller network modules or
MELSECNET/H modules by user programs.
A CC-Link IE controller network module or MELSECNET/H module that are controlled by
another CPU is not accessible by a user program.
Attempting such access causes either of the following errors.
• Non-controlled module read error (return value:-28633)
• Non-controlled module write error (return value:-28654)
Note that, however, a CC-Link IE controller network module controlled by another CPU
can be accessed by a user program if the access is made through a CC-Link IE controller
network.
Also, a MELSECNET/H module controlled by another CPU is accessible by a user
program if the access is made through a MELSECNET/H network.
Remark
For accessible ranges and devices of the MELSEC data link functions, refer to the
following.
C Controller Module User's Manual (Utility Operation, Programming)
Figure 12.15 Access to link devices
1 1 1 1
22
Inaccessible
Accessible
Control CPU setting
Slot number
CPU 0 1 2 3 4
Network modules