Mitsubishi Electric MELSEC Q Series User Manual page 134

(b) Writing to buffer memory
The following instructions cannot be used to write data to the buffer memory of intelligent function modules
being controlled by other CPUs.
• TO instruction
• Instructions that use inteligent function module device (U \G )
• Intelligent function modules dedicated instructions
An "SP. UNIT ERROR (error code: 2116)" will be triggered if an attempt to write to the intelligent function
module controlled by other CPU is carried out.
CPU
1
0 1 2 3 4 5
2 1 1 1 1 2
Write to buffer memory
is disabled.
Write to buffer memory is disabled.
Figure 3.28 Writing to intelligent function module
CHAPTER3 CONCEPT FOR MULTIPLE CPU SYSTEM
Intelligent function module
Slot number
6 7
2 2 Control CPU setting
1
2
3
4
5
6
7
8
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