Mitsubishi Electric MELSEC iQ-R-R6SFM - File Size Unit in Memory; Memory Operation

35 BASIC CONCEPT
35.11 Memory Specifications
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File size unit in memory
The following table lists the unit of the file size (cluster size) of the SIL2 Process CPU memory.
Data is written in the unit of the file size (cluster size). For example, when 464 bytes of CPU parameter is
written to the data memory on the R08PSFCPU, it is written as 2048 bytes of data because the file size unit of
the data memory is 2048 bytes.
Memory operation
Using an engineering tool, each memory can be initialized and cleared to zero. For details on the operation method, refer to
the following.
 GX Works3 Operating Manual
• If the power goes off during initialization or zero clear, the memory is left in the state of that point, and it is
necessary to re-execute the memory operation.
• Following initialization, write the file required to run the SIL2 Process CPU. ( GX Works3 Operating
Manual)
• Following data memory initialization, if the power is turned off and on or reset, the device/label memory will
revert to the default status (default capacity for each area).
SIL2 Process CPU File size unit
Program memory Device/label memory Data memory
R08PSFCPU 128 bytes 512 bytes 2048 bytes
R16PSFCPU 4096 bytes
R32PSFCPU 8192 bytes
R120PSFCPU 16384 bytes
Items to be specified in the engineering tool Target
Initialization Data memory Deletes all the folders and files in the program memory and data
memory.
Device/label memory Deletes all the files in the file storage areas in the device/label memory.
SD memory card Deletes all the folders and files in the SD memory card.
Value clear Device, label Zero clear Excluding devices and labels with latch specified, clears the following to
zero: X, Y, M, B, F, SB, V, T, ST, LT, LST, C, LC, D, W, SW, FX, FY, FD, Z,
LZ, RD, SA\X, SA\Y, SA\M, SA\B, SA\T, SA\ST, SA\C, SA\D, SA\W, and
all labels (including module labels).
Zero clear (including Latches (1) and (2)) Including devices and labels with latch specified, clears the following to
zero: X, Y, M, B, F, SB, V, T, ST, LT, LST, C, LC, D, W, SW, FX, FY, FD, Z,
LZ, RD, SA\X, SA\Y, SA\M, SA\B, SA\T, SA\ST, SA\C, SA\D, SA\W, and
all labels (including module labels).
File register Zero clear All files Clears the contents of all the file register files to zero.
File specification Clears only the contents of the specified file register file to zero.
Zero clear excluding Latch (2) Clears the file register files other than Latch (2) to zero.
Device/label/file register latch clear Clears devices, labels, and file register files other than Latch (2) to zero.