Mitsubishi Q2ACPU, User Manual

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6. DATA COMMUNICATIONS WITH SPECIAL FUNCTION MODULES
6.1 Reading/Writing Data from/to the QnACPU Using the FROM/TO Instruction
When the FROM/TO instruction is performed, data stored in the buffer memory of a
special function module is read, or data is written to the buffer memory of a special
function module.
When the FROM instruction is performed, the data read from the buffer memory is stored
in the specified device. When the TO instruction is performed, the data in the specified
device is written to the buffer memory.
REMARK
1) For details on the FROM/TO instructions, refer to the QCPU (Q mode)/
QnACPU Programming Manual (Common Instructions).
2) For details on the buffer memory of a special function module, refer to the
manual of the special function module in use.
Data communications with a special function module
POINT
When executing the FROM/TO instruction for the special function module
frequently in short scan time, it may cause the target special function module
operation error.
When executing the FROM/TO instruction, match the processing time and
conversion time of the special function module using timer or constant scanning.