App
- 41
Appendix 2 Special Register List
APPENDICES
Number
Name
Meaning
Explanation
Set by
(When Set)
Corres-
ponding
ACPU
D9
Corresponding
CPU
SD50
Error reset
Error number that
performs error
rese
• Stores error number that performs error reset
U
New
Rem
SD51
Battery low
latch
Bit pattern
indicating where
battery voltage
drop occurred
• All corresponding bits go 1(ON) when battery voltage drops.
• Subsequently, these remain 1(ON) even after battery voltage has been
returned to normal.
• In the alarm, data can be held within the time specified for battery low.
• The error indicates the complete discharge of the battery.
• When the High Performance model QCPU, Process CPU, Redundant
CPU or Universal model QCPU is used, the corresponding bits always
remain OFF since the memory card B is a standard memory.
S (Error)
New
SD52
Battery low
Bit pattern
indicating where
battery voltage
drop occurred
• Same configuration as SD51 above
• After the alarm is detected (ON), the alarm turns OFF by error detection
(ON). (For the Universal model QCPU only)
• Turns to 0 (OFF) when the battery voltage returns to normal thereafter.
• When the High Performance model QCPU, Process CPU, Redundant
CPU or Universal model QCPU is used, the corresponding bits always
remain OFF since the memory card B is a standard memory.
S (Error)
New
SD53
AC/DC DOWN
detection
Number of times
for AC/DC DOWN
detection
• Every time 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
incremented by 1 and stored in BIN code.
• The counter repeats increment and decrement of the value ;
0
32767
-32768
0
S (Error)
D9005
Rem
SD54
MINI link errors
Error detection
state
1)
When any of X(n+0)/X(n+20), X(n+6)/X(n+26), X(n+7)/X(n+27) and X(n+8)/X(n+28) of
the mounted MINI(-S3) turns ON, the bit of the corresponding station turns to 1 (ON).
2)
Turns to 1 (ON) when communication between the mounted MINI(-S3) and CPU module
cannot be made.
S (Error)
QnA
SD60
Number of
module with
blown fuse
Number of module
with blown fuse
• Value stored here is the lowest station I/O number of the module with the blown fuse.
S (Error)
Rem
SD61
I/O module
verify error
number
I/O module verify
error module
number
• The lowest I/O number of the module where the I/O module verification number took place.
S (Error)
0
b4 b3 b2 b1 b0
CPU error
: This does not apply to Basic model QCPU.
Memory card A alarm
Memory card A error
Memory card B alarm
Memory card B error
b15
b5
to
to
b15
Information of 2)
Information of 1)
b9
8th
module
1st
module
1st
module
to
b8
b0
8th
module
