559
APPENDICES
A
Appendix 3 List of Special Register Areas
(10)Redundant CPU information (host system CPU information
*1
)
*1 The information of the host CPU module is stored.
(11)Remote password count
*1 Built-in Ethernet port QCPU and Built-in Ethernet port LCPU
Number Name Meaning Explanation
Set by
(When Set)
Corresponding
ACPU
D9
Corresponding
CPU
SD952
History of
memory copy
from control
system to
standby
system
Latest status
of memory
copy from
control
system to
standby
system
This register stores a value indicating the completion status
of the latest memory data copy from the control system to
the standby system.
1) The value same as the SD1596 value is stored at
completion or abend of the memory data copy from the
control system to the standby system.
2) Since data have been backed up in case of power
failure, this register holds the value indicating the
latest memory data copy status from the control
system to the standby system.
3) This register is cleared to 0 by latch clear.
S (Status
change)
New QnPRH
Number Name Meaning Explanation
Set by
(When Set)
Corresponding
ACPU
D9
Corresponding
CPU
SD979
Direct
MELSOFT
connection
Count of
unlock
processing
failures
This register stores the number of mismatched password
entries.
Range: 0 to 0FFFE
H
(0FFFF
H
when the range is exceeded)
S (Status
change)
New
QnU
*1
LCPU
*1
SD980
to
SD995
Connection 1
to 16
SD997
MELSOFT
connection
using UDP port
SD998
MELSOFT
connection
using TCP port
SD999
FTP
communication
port
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