Cpu Shared Memory Structure - Mitsubishi Electric MELSEC Q Series User Manual

(2) Selection of a data communication method
Select a data communication method of the CPU shared memory from the target CPU module.
The following table lists the availability for each type.
Target CPU module
Programmable controller CPU
Motion CPU
(Q172DCPU(-S1),
Q173DCPU(-S1),
Q172DSCPU,Q173DSCPU)
C Controller module
(Q24DHCCPU-V,
Q24DHCCPU-VG,
Q12DCCPU-V (Basic mode)
Q12DCCPU-V (Extended mode),
Q06CCPU-V)
*1 : Universal Model QCPU excluding Q00UCPU, Q01UCPU, and Q02UCPU only.
*2 : Except the Q06CCPU-V.
(3) Functions
The following shows the functions used for reading from/writing to the CPU shared memory.
Function name
*1
QBF_ToBuf
*2
QBF_FromBuf
*1 : MELSEC data link function (mdSendEx function) is also available.
*2 : MELSEC data link function (mdReceiveEx function) is also available.
14.1.1

CPU shared memory structure

Configuration of CPU shared memory for the C Controller module is described below:
Area name
Host CPU operation
information area
System area
QCPU standard
area
Auto refresh area
User setting area
Multiple CPU high speed transmission area
252
Data communication methods using the CPU shared memory
Using the auto
refresh



Writes data to the CPU shared memory of the specified module and the buffer memory of
the intelligent function module (To instruction).
Reads data from the CPU shared memory of the specified module and the buffer memory
of the intelligent function module (From instruction).
Error details or operation status of the host CPU (C Controller module) are stored in
this area. (Page 254, (2) in this section)
This area is used by the system.
This area data are automatically refreshed into devices of the programmable controller
CPU or Motion CPU, based on the auto refresh settings.
The area size varies depending on the parameter settings.
This area are not refreshed automatically.
The area size varies depending on the parameter settings for the Auto refresh area.
This area is used for the multiple CPU high speed transmission.
(Page 262, Section 14.1.3 (2))
The auto refresh area or user setting area can be set with a parameter.
Using the multiple CPU
high speed transmission
area
*1


*2

Function
Q24DHC-V Q24DHC-VG Q24DHC-LS
Description
Not using the auto
refresh



Q26DHC-LS Q12DC-V