694
APPX
Appendix 5 List of Special Register Areas
*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)
SD954 CPU module data
backup/restoration
function
Restoration function
*1
Restoration target data
setting
Set the target data to be restored with the CPU module data restoration
function.
0: All the target data
1: Device/label data only
2: All the target data except for the device/label data
U
SD955 Restoration function
setting
Set the CPU module data restoration function using the following bit
pattern. (Off: Disabled, On: Enabled)
b0: Automatic restoration
b1: Initialization at automatic restoration
b2: Automatic restoration with SD CARD OFF button
b13: Latest data
b14: Special relay and special register
b15: Continuous operation with the status at backup
U
SD956 Restoration target date
folder setting
Store the target folder (date folder) of the CPU module data restoration
using BCD code.
(1) Day (1 to 31)
(2) Month (1 to 12)
(3) Year (last two digits) (0 to 99)
(4) Year (first two digits) (0 to 99)
(Example) To specify the date folder of June 15 2015, store
"H20150615".
U
SD957 U
SD958 Restoration target
number folder setting
Specify the target folder of the CPU module data restoration.
1 to 32767: Serial number of the backup folder (*****) in a date folder
(00001 to 32767)
U
SD959 Restoration error cause • The cause of an error that occurred during the CPU module data
restoration is stored.
0H: No error
Other than 0: For details on the values stored when an error occurs,
refer to the list of error codes. ( Page 552 List of Error Codes)
• "0" is set at the start of the CPU module data backup.
S (Error)
SD960 CPU module data
backup/restoration
function
Backup function
*1
Upper limit status for the
number of CPU module
backup data
This register indicates the set value of the upper limit for the number of
backup data in accordance with bit 5 of SD944.
Bit 5 of SD944 is off: 0
Bit 5 of SD944 is on: 1 to 100
S (Status change)
SD988 Memory copy
completion status
(latch)
Memory copy
completion status (latch)
This register stores a value indicating the completion status of the
memory copy from the control system to the standby system.
• The value same as the SD1654 value is stored at the completion or
abend of the memory copy from the control system to the standby
system.
• Since data have been backed up in case of power failure, this register
holds the value indicating the latest memory copy completion status
from the control system to the standby system.
• This register is cleared to 0 by latch clear.
S (Status change)
No. Name Data stored Details Set by (setting
timing)
SD957
b15 b8 b7 b0b31 b24 b23 b16
(1)(2)(3)(4)
SD956
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