Mitsubishi MELSEC Q Series Programming Manual page 1250

(7) Debugging
Number Name
Debug function Debug function
SD840
usage usage
*1: The module whose first 5 digits of serial No. is "10042" or later.
(8) Redundant CPU information (host system CPU information
Number Name
History of Latest status of
memory copy memory copy
SD952 from control from control
system to system to
standby system standby system
*1: This applies to the Built-in Ethernet port QCPU.
App-242
Meaning
This register indicates the status of the debug function usage
as shown below.
0: Forced on/off for external I/O
1: Executional conditioned device test
2 to 15: Empty (fixed at 0.)
b15 to
0
(0: Not used, 1: Used)
Name
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.
Explanation
b2 b1 b0
Forced ON/OFF for
external I/O
Executional conditioned
device test
Explanation
Corres-
Corres-
ponding
Set by
ponding
ACPU
(When Set)
D9
S
(Status New
change)
*1
)
Corres-
Corres-
ponding
Set by
ponding
ACPU
(When Set)
D9
S
(Status New
change)
CPU
*1
QnU
LCPU
CPU
QnPRH