Mitsubishi Electric MELSEC iQ-R-R00CPU - Page 817

APPX
Appendix 4 List of Special Relay Areas
815
A
*1 This is the memory used by the system when the CPU module is executing functions.
*2 The CPU module where the SD memory card can be used supports these special relay areas.
*3 The CPU module where the extended SRAM cassette can be used supports these special relay areas.
*4 There are restrictions on the firmware version of the supported CPU module and software version of the engineering tool. ( Page
1008 Added and Enhanced Functions)
SM634 Number of rewriting
operations error to data
memory flag
Off: The number of rewrite
operations is less than
100000
On: The number of rewrite
operations reaches
100000
This relay switches to on when the number
of data memory rewriting operations
reaches 100000 (CPU module must be
replaced).
S (Writing) ALL
SM636 System memory write error Off: No write operation/
normal
On: Write error
This relay switches to on when a write error
is detected during write operation to the
system memory (Flash ROM)
*1
. This relay
switches to off when the write instruction is
issued.
S (Writing) RnPSF
RnSF
SM637 System memory write flag Off: No write operation
On: Executing write
operation
This relay switches to on when the write
process to the system memory (Flash
ROM)
*1
is in progress, and switches to off
when the write process is complete.
S (Writing) RnPSF
RnSF
SM638 System memory rewrite
count error flag
Off: The number of rewrite
operations is less than
100000
On: The number of rewrite
operations reaches
100000
This relay switches to on when the number
of system memory (Flash ROM)
*1
rewrite
operations reaches 100000. (CPU module
must be replaced).
S (Writing) RnPSF
RnSF
SM652 Function memory clear
request
OffOn:Clear request exists
OnOff:Function memory
cleared
• The function memory of the CPU module
is initialized (cleared) when this relay is
turned off and on while the operating
status of the CPU module is in STOP.
• The system turns off this relay when the
initialization (clear) of the function
memory is completed (regardless of
whether it was successful or not).
S (Status change)/U Rn
*4
SM653 File transfer to data
memory request
OffOn:Transfer executed
OnOff:Transfer completed
• Files saved in the function memory
(SDRAM) are transferred to the data
memory when this relay is changed from
off to on.
• The system turns off this relay when the
file transfer is completed (regardless of
whether it was successful or not).
Note that the files in the function memory
are not deleted.
S (Status change)/U Rn
*4
No. Name Data stored Details Set by (setting timing) CPU