801
FX
3U
/FX
3UC
Series Programmable Controllers
Programming Manual - Basic & Applied Instruction Edition
36 Operation of Special Devices (M8000 -, D8000 -)
36.1 Special Device List (M8000 -, D8000 -)
31
FN
C
275-FN
C
279
Da
ta
Tr
ans
fe
r 3
32
FN
C
280
-F
N
C
28
9
H
igh Speed
Pr
oces
si
ng 2
33
FN
C
290-FN
C
299
Ext
ensi
on Fi
le
R
egi
st
er
34
SF
C
•S
T
L
Pr
o
g
ra
m
m
in
g
35
In
te
rru
p
t
Funct
ion
36
Sp
e
cia
l De
vic
e
37
E
rro
r C
o
d
e
A
V
e
rs
ion U
p
In
fo
rm
a
tio
n
B
Ex
ec
ut
ion Ti
m
e
s
C
Appl
ic
ab
le
In
st
ru
ct
ion Li
st
Clock
[M]8010
Not used
–
–
–
–
–
–
–
–
[M]8011
10 ms clock pulse
ON and OFF in 10 ms cycle (ON: 5 ms, OFF: 5 ms)
→
Refer to Subsection 36.2.6.
3
3
–
3
3
3
3
3
[M]8012
100 ms clock pulse
ON and OFF in 100 ms cycle (ON: 50 ms, OFF: 50 ms)
→
Refer to Subsection 36.2.6.
3
3
–
3
3
3
3
3
[M]8013
1 sec clock pulse
ON and OFF in 1 sec cycle (ON: 500 ms, OFF: 500 ms)
→
Refer to Subsection 36.2.6.
3
3
–
3
3
3
3
3
[M]8014
1 min clock pulse
ON and OFF in 1 min cycle (ON: 30 sec, OFF: 30 sec)
→
Refer to Subsection 36.2.6.
3
3
–
3
3
3
3
3
M 8015
Clock stop and preset
For real time clock
→
Refer to Subsection 36.2.7.
3
3
–
3
3
3
3
3
*3
M 8016
Time read display is stopped
For real time clock
→
Refer to Subsection 36.2.7.
3
3
–
3
3
3
3
3
*3
M 8017
±30 seconds correction
For real time clock
→
Refer to Subsection 36.2.7.
3
3
–
3
3
3
3
3
*3
[M]8018
Installation detection (Always ON)
For real time clock
→
Refer to Subsection 36.2.7.
3
3
–
3
(Always ON)
*3
M 8019
Real time clock (RTC) error
For real time clock
→
Refer to Subsection 36.2.7.
3
3
–
3
3
3
3
3
*3
Flag
[M]8020
Zero
ON when the result of addition/subtraction is 0.
→
Refer to Subsection 6.5.2 for usage.
3
3
–
3
3
3
3
3
[M]8021
Borrow
ON when the result of subtraction is less than the
min. negative number.
→
Refer to Subsection 6.5.2 for usage.
3
3
–
3
3
3
3
3
M 8022
Carry
ON when 'carry' occurs in result of addition or when
an overflow occurs in result of shift operation.
→
Refer to Subsection 6.5.2 for usage.
3
3
–
3
3
3
3
3
[M]8023
Not used
–
–
–
–
–
–
–
–
M 8024
*1
BMOV direction specification
(FNC 15)
3
3
–
–
3
3
–
3
M 8025
*2
HSC mode
(FNC 53 to 55)
3
3
–
–
–
3
–
3
M 8026
*2
RAMP mode
(FNC 67)
3
3
–
–
–
3
–
3
M 8027
*2
PR mode
(FNC 77)
3
3
–
–
–
3
–
3
M 8028
100 ms/10 ms timer changeover
–
–
–
3
–
–
–
–
Interrupt permission during FROM/TO (FNC 78 and
79) instruction execution
3
3
–
–
–
3
–
3
[M]8029
Instruction execution
complete
ON when operation such as DSW (FNC 72) is
completed.
→
Refer to Subsection 6.5.2 for usage.
3
3
–
3
3
3
3
3
*1.
The operation varies according to PLC:
-
Not cleared in an FX
1N
, FX
2N
, or FX
2NC
PLC.
-
Cleared in an FX
3U
or FX
3UC
when PLC switches from RUN to STOP.
*2.
The operation varies according to a PLC:
-
Not cleared in an FX
2N
or FX
2NC
PLC.
-
Cleared in an FX
3U
or FX
3UC
when PLC switches from RUN to STOP.
*3.
FX
2NC
PLC requires optional memory board (with RTC).
Number and name
Operation and function
Applicable model
FX
3U
FX
3UC
Correspond-
ing special
device
FX
1S
FX
1N
FX
2N
FX
1NC
FX
2NC
