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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 the functions for DeviceNet of GX
Works2.
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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