Mitsubishi MELSEC-Q Series User Manual page 138

3
CONCEPT FOR MULTIPLE CPU SYSTEM
(3) Output to output modules and intelligent function modules
(4) Accessing the intelligent function module buffer memory
3
- 27 3.4 Access Range of CPU Module and Other Modules
3.4.2 Access range with non-controlled module
It is not possible to output ON/OFF data to non-controlled modules.
Devices will be turned ON or OFF inside the QCPU when the output from output
modules or intelligent function modules controlled by other CPUs is turned ON/OFF
by a sequence program, but this will not be actually output to the output modules or
intelligent function modules.
Diagram 3.26 When performing output from CPU No.1 to module
(a) Reading from buffer memory
It is possible to read data from the buffer memory of intelligent function modules
being controlled by other CPUs with the instructions listed below.
• FROM instruction
• Instructions that use inteligent function module device (U \G )
CPU
1 1
Diagram 3.27 Reading from intelligent function module
X0
Y30
X0
Y10
ON/OFF allowed
CPU 0 1 2 3
Input Output Input Output
Number of slot points 16 points 16 points 16 points 16 points
2 2
0 1 2 3 4
2 1 1 1 1 1 1 1 1
Buffer memory can be read.
ON/OFF not allowed
Slot number
4
2 Control CPU setting
Intelligent function module
Slot number
5 6 7
2 2 2 Control CPU setting