Mitsubishi MELSEC-Q/L Programming Manual page 413

(b) Set an execution status for each processing in SD778.
Set an execution status for each bit of SD778 as shown below.
[ QCPU]
Bit of SD778
b0 to b6
b15
b15 b14 to b6
SD778 1/0 0 1/0
Example
To make only the send/receive processing with the remote I/O station faster, designate MELSECNET/H refresh
only.
(Set only b2 and b15 of SD778 to 1 (SD778: 8004
Refresh between the multiple CPUs by the COM instruction is performed under the following condition.
• Receiving operation from other CPUs: When b4 of SD778 (auto refresh in the CPU shared memory) is 1.
• Sending operation from host CPU: When b15 of SD778 (execution status of service processing) is 0.
[ LCPU]
Bit of SD778
b0, b1, b3, b6, b14
b15
b15 b14b13 to
SD778 1/0 1/0 0
Example
To speed up processing of the display unit only, specify communication with the display unit only. (Write "1" to bits
b14 and b15 of SD778 (SD778:C000
Executed Not Executed
1 0
0 1
b5 b4 b3 b2 b1 b0
1/0 1/0 1/0 1/0 1/0 1/0
).)
H
Executed Not Executed
1 0
0 1
b6 b5 b3 b0
b4 b2 b1
1/0 0 0 1/0 0 1/0 1/0
).)
H
I/O refresh
CC-Link refresh
CC-Link IE Controller Network,
MELSECNET/H refresh
Auto refresh of
intelligent function module
Auto refresh using QCPU standard
area of multiple CPU system
Reading inputs/outputs from the outside
of the multiple CPU system group
Auto refresh using the multiple CPU high speed
transmission area of multiple CPU system
CC-Link IE Field Network refresh
Service processing
(communication with programming tool,
GOT, or other external devices)
I/O refresh
Refresh via CC-Link
Auto refresh by intelligent function module
Refresh via CC-Link IE Field Network
Communication with display unit
Service processing (communication with
programming tool, GOT, or external devices)
COM
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