Mitsubishi MELSEC Q Series, Programming Manual

Page: 774 / 816

8-66
8.13 Selection of Refresh Instructions
COM
Remark
The following processes are performed in communication with peripherals.
• Monitoring process of other station
• Read process of another intelligent function module buffer memory by the serial
communication module
(2) Turning OFF SM775 refreshes all refresh items except for I/O refresh.
(3) When selecting refresh items
(a) Select refresh items by SD778, and turn SM775 ON.
The following table shows the refresh items when SM775 is ON or OFF, and refresh
items that can be specified for SD778.
(b) Select refresh items using the bits from b0 to b5 and b15 of SD778.
Whether to execute each bit of SD778 or not can be specified as shown below.
To make only the send/receive processing with the remote I/O station faster,
specify the MELSECNET/H refresh only.
(Set only b2 and b15 of SD778 to 1 (SD778: 8004
H
).)
Refresh item When SM775 is OFF When SM775 is ON
I/O refresh Not executed
Whether to be executed or not can be
selected.
CC-Link refresh
Executed
CC-Link IE controller network refresh
MELSECNET/H refresh
Auto refresh of intelligent function modules
Auto refresh using the QCPU standard area of
the multiple CPU system
Importing input/output data from CPUs that are
not within the multiple CPU system
Auto refresh using the multiple CPU high speed
transmission area of the multiple CPU system
Communication with peripherals
Bit of SD778 Executed Not executed
b0 to b5
1 0
b15
0 1
b15
b0
b1 b2
b3
b4 b5 b6 b14
CC-Link IE controller network,
MELSECNET/H refres
h
to
1/0 1/0 1/0 1/0 1/0 1/0 0 1/0 SD778
Auto refres h of
intelligent function module
Auto refres
h using t h e QCP U standard
area of t h e multiple CP U system
Importing input/output data from CP U s
t h at are not wit h in t h e multiple CP U system
Auto refres h using t h e multiple CP U h ig h
speed transmission area of t h e multiple
CP U system
I/ O refres h
CC-Link refres h
Communication wit h perip h erals
Example