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MELSEC-Q
APPENDICES
Special Register List (Continued)
Number Name Meaning Explanation
Set by
(When set)
Corresponding
ACPU
D9
Corresponding
CPU
SD50 Error reset
Error code where
the error reset is
performed
• This register stores the error code where the error reset is
performed.
U New
Rem
SD53
AC/DC
DOWN
detection
Number of times for
AC/DC DOWN
detection
• A value stored in this register is incremented by 1 whenever the
input voltage falls to or below 85% (AC power)/65% (DC power)
of the rating during operation of the CPU module. The value is
stored in BIN.
• The counter repeats increment and decrement of the value;
0→32767→-32768→0.
S (Error) D9005
Rem
SD60
Number of
module with
blown fuse
Number of module
with blown fuse
• This register stores the lowest I/O number of the module with a
blown fuse.
S (Error) D9000
Rem
SD61
I/O module
verify error
number
I/O module verify
error module
number
• This register stores the lowest I/O number of the module where
the I/O module verify error has occurred.
S (Error) D9002
SD105
CH1
transmission
speed
setting (RS-
232)
Stores a
transmission speed
set in GX
Developer.
96 : 9600bps, 192 : 19.2kbps, 384 : 38.4kbps
576 : 57.6kbps, 1152 : 115.2kbps
The data of the RS-232 connection is used for any other
connection. (When an external device is not connected, the
default is 1152).
S New
Qn(H)
QnPH
QnPRH
QnU
1
Rem
1: This applies to Universal model QCPUs except for the Built-in Ethernet port
QCPU.