File Size Unit In Memory; Memory Operation - Mitsubishi Electric MELSEC iQ-R-R00CPU User Manual

Safety devices and safety labels cannot be latched, and therefore there is no latch area for safety devices and
safety labels.
32.2

File Size Unit in Memory

The following table lists the unit of the file size (cluster size) of the Safety CPU memory.
Safety CPU
R08SFCPU
R16SFCPU
R32SFCPU
R120SFCPU
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 R08SFCPU, it is written as 2048 bytes of data because the file size unit of the
data memory is 2048 bytes.
32.3

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
Items to be specified in the engineering tool
Initialization Data memory
Device/label memory
SD memory card
Value clear Device, label
File register
Device/label/file register latch clear
• 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 Safety 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).
32 MEMORY SPECIFICATIONS
530
32.2 File Size Unit in Memory
File size unit
Program memory
128 bytes
Zero clear
Zero clear (including Latches (1) and (2))
Zero clear All files
File specification
Zero clear excluding Latch (2)
Device/label memory
512 bytes
Target
Deletes all the folders and files in the program memory and data
memory.
Deletes all the files in the file storage areas in the device/label memory.
Deletes all the folders and files in the SD memory card.
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).
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).
Clears the contents of all the file registers to zero.
Clears only the contents of the specified file register(s) to zero.
Clears the file registers other than Latch (2) to zero.
Clears devices, labels, and file registers other than Latch (2) to zero.
Data memory
2048 bytes
4096 bytes
8192 bytes
16384 bytes