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MELSEC-Q
11 TROUBLESHOOTING
Special Register List (Continue)
(12) I/O module verification
Number Name Meaning Explanation
Set by
(When
set)
Corresponding
ACPU
D9
Corresponding
CPU
SD1400 D9116
SD1401 D9117
SD1402 D9118
SD1403 D9119
SD1404 D9120
SD1405 D9121
SD1406 D9122
SD1407 D9123
SD1408 New
SD1409
to
SD1430
New to New
SD1431
I/O module
verification
error
Bit pattern, in
units of 16 points,
indicating the
modules with
verification errors.
0: No I/O
verification
errors
1: I/O verification
error present
• When the power is turned on, the module numbers of the I/O
modules whose information differs from the registered I/O module
information are set in this register (in units of 16 points).
(If the I/O numbers are set by parameter, the parameter-set
numbers are stored.)
• Also detects I/O module information
15 14 13 12 11 10 9 8 7 6
5
43210
000 000 0000000
D9116
00 0 00000000D9117 0 0
0 0 0000 000D9123 0 000
00
00
00
1
(
)
X Y
1FE0
1
( )
1
( )
X Y
190
X Y
0
Indicates an I/O module verification error
• Not cleared even if the blown fuse is replaced with a new one.
This flag is cleared by error resetting operation.
S (Error)
New
+Rem
(13) For redundant systems (Host system CPU information
1) for Q4AR only
SD1510 to SD1599 are only valid for redundant systems.
They are all set to 0 for standalone systems.
Number Name Meaning Explanation
Set by
(When set)
Corresponding
ACPU
D9
Corresponding
CPU
SD1500
SD1501
Basic period
Basic period
tome
• Set the basic period (1 second units) use for the process
control instruction using floating point data.
SD1501 SD1500Floating points data =
U New
SD1502
Process control
instruction detail
error code
Process control
instruction detail
error code
• Shows the detailed error contents for the error that occurred
in the process control instruction
S (Error
occurrence)
New
SD1503
Process control
instruction
generated error
location
Process control
instruction
generated error
location
• Shows the error process block that occurred in the process
control instruction.
S (Error
occurrence)
New
SD1512
Operation mode
during CPU start
up
Hot start switch
power out time
• Shows the power out time (S) during the automatic switch
from hot start to initial start in the operation mode when the
CPU module is started up.
S (Initial) New
SD1590
Switch request
network No.
Request origin
network No.
• Stores the request origin at work No. when the SM1590 is
turned on.
S (Error
occurrence)
New
Q4AR
1 Host system CPU information is stored.