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MELSEC-Q
11 TROUBLESHOOTING
Special Register List (Continued)
Number Name Meaning Explanation
Set by
(When set)
Corresponding
ACPU
D9
Corresponding
CPU
1
When Xn0 of the installed CC-Link goes ON, the bit
corresponding to the station switches ON.
2
When either Xn1 or XnF of the installed CC-Link switch OFF, the
bit corresponding to the station switches ON.
3
Switches ON when the CPU module cannot communicate with
the installed CC-Link.
B0
1st module
2nd module
3rd module
B3B4B7B8
B11B12
B15
Vacant
4th module
Information
of
1
Information
of
2
Information
of
3
The above module numbers n are in order of the head I/O Nos.
(However, the modules without parameter setting are not counted in.)
S (Error) New
QCPU
Remote
SD280 CC-Link error
Error detection
status
1
When Xn0 of the installed CC-Link goes ON, the bit
corresponding to the station switches ON.
2
When either Xn1 or XnF of the installed CC-Link switch OFF, the
bit corresponding to the station switches ON.
3
Switches ON when the CPU module cannot communicate with
the installed CC-Link.
B15 B8B9 B0
8th
module
8th
module
1st
module
1st
module
...
toto
...
Information of
1
Information of
2
S (Error) New QnA
SD290
Number of
points
allocated for X
• Stores the number of points currently set for X devices
SD291
Number of
points
allocated for Y
• Stores the number of points currently set for Y devices
SD292
Number of
points
allocated for M
• Stores the number of points currently set for M devices
+Rem
SD293
Number of
points
allocated for L
•
Stores the number of points currently set for L devices
SD294
Number of
points
allocated for B
• Stores the number of points currently set for B devices
+Rem
SD295
Number of
points
allocated for F
• Stores the number of points currently set for F devices
SD296
Number of
points
allocated for
SB
• Stores the number of points currently set for SB devices
+Rem
SD297
Number of
points
allocated for V
• Stores the number of points currently set for V devices
SD298
Number of
points
allocated for S
• Stores the number of points currently set for S devices
SD299
Number of
points
allocated for T
• Stores the number of points currently set for T device
SD300
Number of
points
allocated for
ST
• Stores the number of points currently set for ST devices
SD301
Device
allocation
(Same as
parameter
contents)
Number of
points
allocated for C
• Stores the number of points currently set for C devices
S (Initial) New