Mitsubishi Electric QJ71LP21 Reference Manual page 20

1 OVERVIEW
QCPU Master station
JP.WRITE
QCPU Master station
Link register W Link register LW
Refresh
I50
Interrupt
sequence
program
IRET
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3) By refreshing the intelligent function module data into the remote I/O
module's data register D by the automatic refresh setting of the
intelligent function module parameters, the remote master station can
read/write data from/to the data register D with READ or WRITE
instruction.
Remote master station
QCPU
Intelligent function
module parameters
• Initial settings
• Automatic refresh
settings
4) The automatic refresh setting of the intelligent function parameters
enables the intelligent function module data to be refreshed into the
remote I/O module's data register D. By refreshing the data register D
to the link register W with the parameter of the remote I/O module, the
remote master station can read/write the intelligent function module
data by cyclic transmission.
This method has the advantage that the intelligent function module
parameters created for QCPU can be applied to the remote I/O
module without making any modifications.
Remote master station
QCPU
Intelligent function
module parameters
• Initial settings
• Automatic refresh
settings
(b) The interrupt sequence program of the host's CPU module can be started
up using the event issue function. This function reduces the response time
of the system and enables real-time data reception.
(See Section 7.7, "Starting Up the Interrupt Sequence Program.")
CPU module
MAIN
Conditions
Normal
matched
sequence
program
END
WRITE
Remote I/O station
Intelligent function module
GX
Configurator
Remote I/O station
Intelligent function module
LW
GX
Configurator
Network module
Condition check
Interrupt condition
parameters
• Relay information
• Register data
• Network status
MELSEC-Q
Intelligent
Remote I/O module function module
Data
register D memory
Refresh
Remote I/O module function module
Link Data
register W register D
Refresh Refresh
MELSECNET/H
Cyclic transmission
Buffer
Intelligent
Buffer
memory
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