Latch Area - Mitsubishi Electric MELSEC iQ-R Series 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
*1
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
*1
backup data
SM961 Automatic backup retry
*1
failure flag
*1 There are restrictions on the firmware version of the CPU module and software version of the engineering tool. ( Page 747 Added
and Enhanced Functions)
APPX
658
Appendix 4 List of Special Relay Areas
Data stored
Off: Update completed
*1
without an error
(including successful
completion)
On: Update completed
with an error
Off: Registration disabled
On: Registration not
disabled
Off: No error
*1
On: Error
Off: No error
*1
On: Error
Off: Backup continued
On: Backup stopped
Off: Retry not executed/
Retry being executed
On: Retry failed
Details
This relay switches to on when the firmware update function
(firmware update using an SD memory card) is completed
with an error. (switching to on when SD922 is 0100H to
0300H)
Set the operation when files relevant to the device test with
execution conditions are changed.
• This relay turns on if an error occurs at the execution of
backup of the CPU module.
• This relay turns off at the start of the CPU module data
backup.
• This relay turns on if an error occurs at the execution of
restoration of the CPU module.
• This relay turns off at the start of restoration of the CPU
module.
This relay specifies the operation of backup 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 folder, the backup
is continued.
On: The backup is not continued if the upper limit of the
number of backup data is exceeded. (In this case, the
backup is completed with an error.)
This relay turns on when the retry of the automatic backup of
the CPU module is 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.)
Set by (setting
timing)
S (Initial)
U
S (Status change)
S (Status change)
U
S (Status change)