Specifications

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3.1.4 Automatic refresh for shared memory
(1) With automatic refresh of the CPU shared memory, the transmission/reception of
data between each CPU of multi-CPU system is executed automatically by the Q-
PLC CPU during END processing, and by the Q motion CPU during main cyclic
processing (dead time other than motion control) respectively.
Since the data is read automatically from the device memory of other machines
when the automatic refresh is used, it is possible to use the device data of other
machines as device data of local machine.
.
The following shows the outline operation in case when the No. 1 machine
executes the automatic refresh for 32 points of B0 to B1F and the No. 2 machine
executes the 32 points of B20 to B3F.
Contents of processing (END processing of No. 1 machine)
(1) Shift of transmission device (B0 to B1F) data for No. 1 machine to
automatic refresh area of shared memory of local machine
(4) Shift of automatic refresh area data within shared memory of No. 2
machine to B20 to B3F of local machine
Contents of processing (main cyclic processing of No. 2 machine)
(2) Shift of transmission device (B20 to B3F) data for No. 2 machine to
automatic refresh area of shared memory of local machine
(3) Shift of automatic refresh area data within shared memory of No. 1
machine, to B0 to B1F of local machine
No. 1 machine (Q-PLC CPU) No. 2 machine (Q motion CPU)
CPU shared memory
Local machine operation
information area
System area
No. 1 machine automatic
refresh area
User free area
(1) Writing by END
processing of No. 1
machine
Device memory
For No. 1 machine
For No. 2 machine
(3) Reading by cycli
processing of No. 2
machine
(4) Reading by END
processing of No. 1
machine
CPU shared memory
Local machine operation
information area
System area
No. 2 machine automatic
refresh area
User free area
(2) Writing by main cycli
processing of No. 2
machine
Device memory
For No. 1 machine
For No. 2 machine