Appendix A-2 Special Data Register (D8000 To D8511) - Mitsubishi Electric MELSEC-F FX3G Series User Manual

FX Series Programmable Controllers
3G
User's Manual - Hardware Edition

Appendix A-2 Special Data Register (D8000 to D8511)

Number and
Content of register
name
PLC Status
Default value is 200ms
(in 1ms steps)
(Writes from system ROM at power
D 8000
ON)
Watchdog timer
Value overwritten by program is
valid after END or WDT instruction
execution.
2 6 1 0 0
[D]8001
PLC type and
system version
FX
3G
• 2...2K steps
• 4...4K steps
[D]8002 • 8...8K steps
Memory capacity • If 16K steps or more
"K8" is written to D8002 and
"16" or "32" is written to D8102.
Stores the memory type (built-in
EEPROM or memory cassette) and
[D]8003
the PROTECT switch ON/OFF
Memory type
status of the memory cassette.
8 0 6 0
[D]8004
Error number M
8060 to 8068
(when M8004 is ON)
[D]8005
Battery voltage present value
Battery voltage
(Example: 3.0V)
[D]8006
Default: 2.7V (in units of 0.1V)
Low battery
(Writes from system ROM at power
voltage detection
ON)
level
[D]8007 Not used
D 8008 Not used
[D]8009 Lowest input device number of
24V DC failed input/output powered extension unit
device in which 24V DC has failed.
*1. D8003 becomes the undermentioned content.
Present
Type of memory
value
02H EEPROM memory cassette
0AH EEPROM memory cassette
10H Built-in memory in PLC
400
Correspond-
ing special
device
D8101
Version 1.00
Series
M8002
D8102
*1
M8004
(in units of 0.1V)
3 0
M8005
M8006
M8009
Protect switch
OFF
ON
Appendix A-2 Special Data Register (D8000 to D8511)
Number and
name
Clock
[D]8010
Present scan
*2
time
-
[D]8011
Minimum scan
*2
time
[D]8012
Maximum scan
*2
time
D 8013
Second data
D 8014
Minute data
D 8015
Hour data
D 8016
Day data
D 8017
-
Month data
D 8018
Year data
D 8019
Day-of-the-week
data
*2. Indicated value includes waiting time of constant scan
operation (when M8039 is activated).
Input Filter
D 8020
Input filter
adjustment
[D]8021
[D]8022
[D]8023
-
[D]8024
-
[D]8025
[D]8026
[D]8027
Index Register Z0 and V0
[D]8028
[D]8029
*3. The values of Z1 to Z7 and V1 to V7 are stored in D8182 to
D8195.
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Appendix A: Special Device List
Content of register
Accumulated instruction-execution
time from 0 step
(in units of 0.1ms)
Minimum value of scan time
(in units of 0.1ms)
Maximum value of scan time
(in units of 0.1ms)
0 to 59 seconds
(for real time clock)
0 to 59 minutes
(for real time clock)
0 to 23 hours
(for real time clock)
1 to 31 days
(for real time clock)
1 to 12 months
(for real time clock)
2 digits of year data (0 to 99)
(for real time clock)
0 (Sunday) to 6 (Saturday)
(for real time clock)
Input filter value of X000 to X007
(Default: 10ms)
Not used
*3
Value of Z0 (Z) register
*3
Value of V0 (V) register
Correspond-
ing special
device
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