Slave Function (I/O Communication Function) - Mitsubishi Electric QJ71DN91 User Manual

4 FUNCTIONS

4.3 Slave Function (I/O Communication Function)

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This function allows I/O data communication with the master node, using the buffer
memory of the QJ71DN91.
Communications of 128 input bytes and 128 output bytes are available.
The polling method is used as the connection type.
Master node
Transmit
Receive
(1) Setting for I/O communication with the master node
(a) Set the number of I/O points in Parameters for Slave Function (address:
060E , 060F
H
This setting is not needed if the default values (8 bytes for each) are used.
(b) Slave function parameters are set in GX Configurator-DN or sequence
programs. (Refer to Section 8.2.)
(2) Reading/writing I/O data
(a) I/O data are stored in the following buffer memory areas.
Buffer memory
Item
address (Hex.)
Slave function receive
0B00 to 0B3F
H H
data
0C00 to Slave function transmit
H
0C3F data
H
(b) Data transfer between the buffer memory and programmable controller
CPU devices
Transfer method
Auto refresh
MOV or FROM/TO instruction Configure the settings in sequence programs.
QJ71DN91
I/O Communication
Request
0B00
H
Function
Receive
Data area
0B3F
H
0C00
H
Function
Transmit
Data area
0C3F
H
) to exchange I/O data with the master node.
H
Data received from the master node are stored.
Data to be sent to the master node are set.
Description
Configure the auto refresh settings in GX Configurator-DN.
Slave node
Programmable controller CPU
Slave
Slave
Description
MELSEC-Q
SET Y11
X
Y
Reference
section
3.4.10
Reference
section
8.3.1
8.3.2
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