Mitsubishi FX3U Series User Manual

FX3U Series Programmable Controllers
User’s Manual - Hardware Edition
449
A Operation of Special Devices (M8000 -, D8000 -)
A-2 Special Data Register (D8000 to D8511)
21
Memory Cassette
22
Battery
A
Special Devices (M8000-,D8000-)
B
Instruction List
C
Character-code
D
Discontinued models
Appendix A-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:
(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:
10 ms (AC power supply type)
M8008
[D]8009
24V DC failed
device
Minimum input device number of
extension units and extension
power units in which 24V DC has
failed.
M8009
*1. D8003 becomes the undermentioned content.
BCD converted
value
2 4 2 2 0
FX 3U , FX 3UC , FX 2N , FX 2NC
Series
Version 2.20
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 FX3U-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

Mitsubishi FX3U Series Specifications

General

Model	FX3U Series
Program Memory	64k steps
Execution Speed	0.065 μs/basic instruction
Type	PLC (Programmable Logic Controller)
Power Supply	100-240V AC
I/O Points	Up to 384
Communication	USB
Expansion	Supported via expansion modules
High-Speed Counters	Up to 6 channels
Analog Input/Output	Available via expansion modules
Temperature Range	0 to 55°C
Programming Language	Ladder Logic, Structured Text
Built-in Functions	PID control
Humidity	5 to 95% (non-condensing)