Mitsubishi Melsec-Q Series User Manual page 551

(7) Debug
Number Name Meaning
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 Meaning
History of Latest status of
memory copy memory copy
SD952 from control from control
system to system to standby
standby system system
*1: The host system CPU information is stored.
(9) Remote password count
Number Name Meaning
Direct
SD979 MELSOFT
connection
SD980 to Connection
SD995 1 to 16
Count of unlock
processing
MELSOFT
failures
SD998 connection
using TCP port
FTP
SD999 communi
cation port
*1: This applies to the Built-in Ethernet port QCPU.
Table12.41 Special register
Explanation
Stores 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:Absent (0 fix)
b15 to b2 b1 b0
0
(0: Not used, 1: Used)
Table12.42 Special register
Explanation
Stores the completion status of the memory copy from control system to
standby system executed last.
1) Stores the same value as stored into SD1596 at normal completion/
abnormal completion of the memory copy from control system to
standby system.
2) Backed up for a power failure, this special register holds the status of
memory copy from control system to standby system executed last.
3) Cleared to 0 by latch clear operation.
Table12.43 Special register
Explanation
Stores the count of unlock processing failures.
Range: 0 to FFFE (FFFF when the limit is exceeded)
H H
CHAPTER12 TROUBLESHOOTING
Set by
(When Set)
S (Status
change)
Forced ON/OFF for
external I/O
Executional conditioned
device test
*1
)
Set by
(When Set)
S (Status
change)
Set by
(When Set)
S(Status
change)
Corres-
ponding Corresponding
ACPU
CPU
D9
*1
New
QnU
Corres-
ponding
Corresponding
ACPU
CPU
D9
New QnPRH
Corres-
ponding Corresponding
ACPU CPU
D9
*1
New QnU
12 - 256
1
2
3
12
6
7
8