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FX3S/FX3G/FX3GC/FX3U/FX3UC Series
Programming Manual - Basic & Applied Instruction Edition
37 Operation of Special Devices (M8000 -, D8000 -)
37.1 Special Device List (M8000 -, D8000 -)
31
FNC277-FNC279
Data
Transfer 3
32
FNC280-FNC289
High-Speed
Processing 2
33
FNC290-FNC299
Extension File
Register Control
34
FNC300-FNC305
FX
3U
-CF-ADP
35
SFC•STL
Programming
36
Interrupt
Function
37
Special Device
38
Error Code
A
Version Up
Information
B
Execution Times
PLC Status
[D]8007
Momentary power
failure count
Operation frequency of M8007 is stored.
Cleared at power-off.
– – – M8007 – – –
D8008
Power failure
detection
Default:
*1
•FX3U/FX2N PLCs:
10 ms (AC power supply type)
•FX3UC/FX2NC PLCs:
5 ms (DC power supply type)
– – – M8008 – – –
[D]8009
24V DC failed
device
Lowest input device number of the I/O
extension units in which 24 V DC power has
failed
– – – M8009 – – –
*1. The power failure detection time in FX2N/FX2NC PLCs is as follows.
For FX
3U/FX3UC PLCs, refer to Subsection 37.2.4.
-10ms for FX
2N PLC used with a 100V AC power supply system. D8008 is set to 10ms by default.
- 100ms maximum for FX
2N PLC used with a 200V AC power supply system. D8008 can be set ranging
from 10 to 100 ms.
- 5ms for FX
2N PLC used with a DC power supply type. Write "K-1" to D8008 for correction.
- 5ms for FX
2NC PLC used with a DC power supply type. System writes "K-1" to D8008 for correction. Do
not make any change in a sequence program.
Clock
[D]8010
Present scan time
Accumulated instruction-execution time from
step 0
(in 0.1-ms units)
→Refer to Subsection 37.2.5.
Same
as on
the
right
Same
as on
the
right
Same
as on
the
right
Same
as on
the
right
Same
as on
the
right
–
Indicated value includes waiting
time of constant scan operation
(when M8039 is activated).
[D]8011
Minimum scan time
Minimum value of scan time
(in 0.1-ms units)
→Refer to Subsection 37.2.5.
–
[D]8012
Maximum scan
time
Maximum value of scan time
(in 0.1-ms units)
→Refer to Subsection 37.2.5.
–
D8013
Second data
0 to 59 seconds
(for real time clock)
→Refer to Subsection 37.2.7.
–
*2
D8014
Minute data
0 to 59 minutes
(for real time clock)
→Refer to Subsection 37.2.7.
–
*2
D8015
Hour data
0 to 23 hours
(for real time clock)
→Refer to Subsection 37.2.7.
–
*2
D8016
Day data
1 to 31 days
(for real time clock)
→Refer to Subsection 37.2.7.
–
*2
D8017
Month data
1 to 12 months
(for real time clock)
→Refer to Subsection 37.2.7.
–
*2
D8018
Year data
2 digits of year data (0 to 99)
(for real time clock)
→Refer to Subsection 37.2.7.
–
*2
D8019
Day-of-the-week
data
0 (Sunday) to 6 (Saturday)
(for real time clock)
→Refer to Subsection 37.2.7.
–
*2
*2. A memory board having the real time clock function is required in FX2NC PLC.
Number and
name
Content of register
Applicable model
FX
3S
FX
3G
FX
3GC
FX
3U
FX
3UC
Correspond-
ing special
device
FX
1S
FX
1N
FX
1NC
FX
2N
FX
2NC