Mitsubishi Electric MELSEC Q Series User Manual page 323

(8) CPU shared memory
A CPU shared memory is a memory in a multiple CPU system that stores data to cooperation between CPU
modules. It is cleared to 0 at power OFF or reset.
A CPU shared memory is accessed from the user program by using the bus interface function or MELSEC data
link function.
Functions used are indicated below.
Function name
QBF_ToBuf
QBF_FromBuf
mdSendEx
mdReceiveEx
*1 : Specify DevSPB1-DevSPB4 as a device name. (Page 366, Section 22.5)
Remark
● For the bus interface function and MELSEC data link function, refer to the following.
Page 356, CHAPTER 21. Page 362, CHAPTER 22
● For data communication function by the CPU shared memory, refer to the following.
Page 252, Section 14.1.1
(9) Data refresh memory
A data refresh memory is a memory that stores device data to be read/written by the data refresh function. It is
cleared to 0 at power OFF or reset.
Access to a data refresh memory from the C Controller module dedicated function by using the user program is
allowed. Functions used are indicated below.
Function name
CCPU_WriteDataRefreshMemory
CCPU_ReadDataRefreshMemory
Remark
● For C Controller module dedicated function, refer to the following.
Page 353, CHAPTER 20
● For data refresh between the data refresh memory and user device(s), refer to the following.
Page 171, Section 11.7.1
Writes data into the CPU shared memory in the specified module location.
Reads data from the CPU shared memory in the specified module location.
*1
Batch writes devices .
*1
Batch reads devices .
Writes data into the data refresh memory.
Reads data from the data refresh memory.
CHAPTER 18 MEMORIES AND FILES
Function
Function
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