Writing To The Cpu Shared Memory Of Host Cpu - Mitsubishi MELSEC Q Series Programming Manual

9.1

Writing to the CPU Shared Memory of Host CPU

The S.TO or TO instruction is used to write to the CPU shared memory of the host station in the
multiple CPU system.
The following table indicates the usability of the S.TO and TO instructions.
Basic model QCPU
High Performance model QCPU
Process CPU
Redundant CPU
Universal model QCPU
LCPU
(1) Operation of S.TO instruction
The S.TO instruction can write data to the CPU shared memory of the host CPU module.
The following figure shows the processing performed when the S.TO instruction is executed
in CPU No. 1.
Device
memory
9-2
CPU Module Type Name
Q00JCPU
Q00CPU, Q01CPU
Q02CPU, Q02HCPU,
Q06HCPU, Q12HCPU,
Q25HCPU
Q02PHCPU, Q06PHCPU,
Q12PHCPU, Q25PHCPU
Q12PRHCPU, Q25PRHCPU
Q00UJCPU
Q00UCPU, Q01UCPU,
Q02UCPU, Q03UDCPU,
Q04UDHCPU, Q06UDHCPU,
Q10UDHCPU, Q13UDHCPU,
Q20UDHCPU, Q26UDHCPU,
Q03UDECPU,
Q04UDEHCPU,
Q06UDEHCPU,
Q10UDEHCPU,
Q13UDEHCPU,
Q20UDEHCPU,
Q26UDEHCPU
L02CPU, L26CPU-BT
CPU No. 1
CPU Device
Data
shared memory
write
memory
[ SP.TO H3E0 n2 n3 n4 D ]
Designation of CPU shared memory in CPU No. 1
S.TO Instruction
Unusable
Usable
Usable
Usable
Unusable
Unusable
Usable
Unusable
Intelligent
CPU No. 2
function module
CPU Buffer
shared memory
memory
TO Instruction
Unusable
Usable
Unusable
Unusable
Unusable
Unusable
Usable
Unusable