Mitsubishi MELSEC-Q/L User Manual

692
(8) Program example when the multiple CPU high-speed transmission dedicated instructions are executed to CPU modules
by turns
When the multiple CPU high-speed transmission dedicated instructions are executed to Universal model QCPUs by
turns, release an interlock to prevent the concurrent execution.
Use the cyclic transmission area device (from U3En\G10000) as an interlock.
The following shows a program example when the multiple CPU high-speed transmission dedicated instructions are
executed at CPU No.s 1 and 2 by turns.
Program example when the multiple CPU high-speed transmission dedicated instruction is executed at CPU No.1
SM402
Turn-on for one scan
after RUN
MOV K7 SD797
Maximum number
of used blocks
(CPU No.2)
X0
SET M0
During execution of the
DDWR instruction
Write command
U3E0 \ G10000.0 is turned on while CPU No.1 is executing the DP.DDWR instruction.
M0 U3E1\G10000.0 SM797
During execution
of the DDWR
instruction
CPU No.2 is
during execution
of the instruction
Number of used
blocks information
(CPU No.2)
SET G10000.0
U3E0\
CPU No.1 is during
execution of the
instruction
MOV K100 D1
Number of
write points
DP.DDWR H3E1 D0 ZR100 ZR100 M1
Completion
status
Completion
device
RST M0
During execution of
the DDWR instruction
U3E0 \ G10000.0 is turned on while CPU No.1 is executing the DP.DDWR instruction.
SET G10000.0
U3E0\
CPU No.1 is during of
the instruction
M1
Completion device

Mitsubishi MELSEC-Q/L Specifications

General

Brand	Mitsubishi
Model	MELSEC-Q/L
Category	Controller
Language	English