Mitsubishi MELSEC-Q Series User Manual page 139

3
CONCEPT FOR MULTIPLE CPU SYSTEM
(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 0 1
1 2 1
Write to buffer memory
is disabled.
Write to buffer memory is disabled.
Diagram 3.28 Writing to intelligent function module
3.4 Access Range of CPU Module and Other Modules
3.4.2 Access range with non-controlled module
Intelligent function module
2 3 4 5 6 7
1 1 1 2 2 2
Slot number
Control CPU setting
3
- 28
1
2
3
4
5
6
7
8