432
FX3UC Series Programmable Controllers
User’s Manual - Hardware Edition
C Operation of Special Devices (M8000 -, D8000 -)
C-2 Special Data Register (D8000 to D8511)
Appendix C-2 Special Data Register (D8000 to D8511)
Number and
name
Content of register
Correspond-
ing special
device
PLC Status
D 8000
Watchdog timer
Default value is shown on the right
(in 1ms steps)
(Writes from system ROM at power
ON)
Value overwritten by program is
valid after END or WDT instruction
execution.
–
[D]8001
PLC type and
system version
D8101
[D]8002
Memory capacity
• 2...2K steps
• 4...4K steps
• 8...8K steps
• If 16K steps or more
"K8" is written to D8002 and "16"
or "64" is written to D8102.
D8102
[D]8003
Memory type
Type of cassette or ON/OFF status
of memory protect switch is
stored.
*1
–
[D]8004
Error number M
M8004
[D]8005
Battery voltage
M8005
[D]8006
Low battery
voltage detection
level
Default: 2.7V (in units of 0.1V)
(Writes from system ROM at power
ON)
M8006
[D]8007
Momentary power
failure count
Operation frequency of M8007 is
stored.
Cleared at power-off.
M8007
D 8008
Power failure
detection
Default: 5 ms
M8008
[D]8009
24V DC failed
device
Minimum input device number of
extension power supply units and
extension power units in which 24V
DC has failed.
M8009
*1. D8003 becomes the under mentioned content.
BCD converted
value
2 4 1 0 0
FX
3U
, FX
3UC
, FX
2N
, FX
2NC
Series
Version 1.00
BCD converted
value
8 0 6 0
8060 to 8068
(when M8004 is ON)
BCD converted
value
(in units of 0.1V)
3 0
Battery voltage present value
(Example: 3.0V)
Present value Type of memory Protect switch
02H Flash memory cassette OFF
0AH Flash memory cassette ON
10H Built-in memory in PLC –
Clock
[D]8010
Present scan
time
*2
Accumulated instruction-execution
time from 0 step
(in units of 0.1 ms)
–
[D]8011
Minimum scan
time
*2
Minimum value of scan time
(in units of 0.1 ms)
–
[D]8012
Maximum scan
time
*2
Maximum value of scan time
(in units of 0.1 ms)
–
D 8013
Second data
0 to 59 seconds
(for real time clock)
–
D 8014
Minute data
0 to 59 minutes
(for real time clock)
–
D 8015
Hour data
0 to 23 hours
(for real time clock)
–
D 8016
Day data
1 to 31 days
(for real time clock)
–
D 8017
Month data
1 to 12 months
(for real time clock)
–
D 8018
Year data
2 digits of year data (0 to 99)
(for real time clock)
–
D 8019
Day-of-the-week
data
0 (Sunday) to 6 (Saturday)
(for real time clock)
–
*2. Indicated value includes waiting time of constant scan
operation (when M8039 is activated).
Input Filter
D 8020
Input filter
adjustment
Input filter value of X000 to X017
*3
(Default: 10 ms)
–
[D]8021
Not used
–
[D]8022
–
[D]8023
–
[D]8024
–
[D]8025
–
[D]8026
–
[D]8027
–
Index Register Z0 and V0
[D]8028
Value of Z0 (Z) register
*4
–
[D]8029
Value of V0 (V) register
*4
–
*3. X000 to X007 in FX3UC-16M.
*4. The values of Z1 to Z7 and V1 to V7 are stored in D8182 to
D8195.
Number and
name
Content of register
Correspond-
ing special
device
To Next Page
Loading...
Need help?
General
