Latch Area - Mitsubishi Electric MELSEC iQ-R-R00CPU User Manual

Latch area

The following is the list of special relay areas relating to the latch area.
No. Name
SM922 Firmware update
completion with/without an
error
SM940 Operation setting of the
device test with execution
conditions
SM953 CPU module data backup
error check flag
SM959 CPU module data
restoration error check flag
SM960 Upper limit setting flag for
the number of CPU module
backup data
SM961 Automatic backup retry
failure flag
*1 The CPU module where this function can be used supports this special relay area.
Data stored Details
Off: Update completed This relay switches to on when the firmware
without an error update function is completed with an error.
(including successful (switching to on when SD922 is 0100H to
completion) 0300H)
On: Update completed with
an error
Off: Registration disabled Set the operation when files relevant to the
On: Registration not device test with execution conditions are
disabled changed.
Off: No error • This relay turns on if an error occurs at
On: Error the execution of backup of the CPU
module.
• This relay turns off at the start of the CPU
module data backup.
Off: No error • This relay turns on if an error occurs at
On: Error the execution of restoration of the CPU
module.
• This relay turns off at the start of
restoration of the CPU module.
Off: Backup continued This relay specifies the operation of backup
On: Backup stopped when the number of backup data of the CPU
module reaches the upper limit. (This relay
is valid only when bit 5 of SD944 is on.)
Off: After deleting the oldest date stamp
On: The backup is not continued if the
Off: Retry not executed/ This relay turns on when the retry of the
Retry being executed automatic backup of the CPU module is
On: Retry failed failed even after the specified number of
retries are attempted. This relay turns off at
the start of the automatic backup. (This
relay does not turn off when SM1351 is on.)
folder, the backup is continued.
upper limit of the number of backup
data is exceeded. (In this case, the
backup is completed with an error.)
Appendix 4 List of Special Relay Areas
Set by (setting timing) CPU
*1
S (Initial) Rn
*1
U Rn
*1
S (Status change) Rn
*1
S (Status change) Rn
*1
U Rn
*1
S (Status change) Rn
APPX
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