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4 FUNCTIONS
4
4 - 2
(2) Reading/writing I/O data
(a)
I/O data are stored in the following buffer memory areas.
Buffer memory
Item
address (Hex.)
Master function
0700
to 07FF
H
H
receive data
Master function
0900
to 09FF
H
H
transmit data
(b)
Data transfer between the buffer memory and programmable controller
CPU devices
Transfer method
Auto refresh
Configure the auto refresh settings
in GX Configurator-DN.
MOV or FROM/TO
instruction
Configure the settings in sequence
Data consistency
programs.
dedicated instruction
(DNTMRD, DNTMWR)
(3) Operation flow
This section explains how I/O communication is performed with each slave node.
(a)
When starting I/O communication by I/O Communication Request (Y11)
Module Ready (X0F)
OFF
Auto Configuration
Request (Y15)
OFF
Request for Saving
Parameters to
OFF
Flash ROM (Y17)
I/O Communication
OFF
Request (Y11)
I/O Communicating
OFF
(X01)
Error Set Signal for
OFF
Master Function (X03)
Error Information for
Master Function (01B1
)
H
Parameters for Master
Function (01D4
to 03CF
)
H
H
Data consistency dedicated
instruction for master
function (bit 0 of 0633
)
H
Master Function Receive
Data (0700
to 07FF
)
H
H
Master Function Transmit
Data (0900
to 09FF
)
H
H
Description
Data received from each slave node are stored.
Data to be sent to each slave node are set.
Description
ON
3)
3)
4)
ON
1)
Parameter
MOV/TO
instruction
1)
MOV/TO
instruction
2)
MOV/TO
instruction
MELSEC-Q
Reference
Data consistency
Not ensured
Not ensured
Ensured
5)
ON
6)
ON
MOV/FROM
instruction
check
MOV/FROM instruction or
DNTMRD
MOV/TO instruction or
DNTMWR
section
3.4.6
Reference
section
7.4.1
7.4.2
7)
OFF
OFF
4 - 2
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