Mitsubishi FX3U Series User Manual

450
FX3U Series Programmable Controllers
User’s Manual - Hardware Edition
A Operation of Special Devices (M8000 -, D8000 -)
A-2 Special Data Register (D8000 to D8511)
Constant Scan
[D]8030
Not used
–
[D]8031 –
[D]8032 –
[D]8033 –
[D]8034 –
[D]8035 –
[D]8036 –
[D]8037 –
[D]8038 –
D 8039
Constant scan
duration
Default: 0 ms (in 1 ms steps)
(Writes from system ROM at power
ON)
Can be overwritten by program
M8039
Stepladder and Annunciator
[D]8040
*1
ON state number
1
The smallest number out of active
state ranging from S0 to S899 and
S1000 to S4095 is stored in D8040
and the second-smallest state
number is stored in D8041.
Active state numbers are then
sequentially stored in registers up
to D8047 (Max. 8 points).
M8047
[D]8041
*1
ON state number
2
[D]8042
*1
ON state number
3
[D]8043
*1
ON state number
4
[D]8044
*1
ON state number
5
[D]8045
*1
ON state number
6
[D]8046
*1
ON state number
7
[D]8047
*1
ON state number
8
[D]8048 Not used –
[D]8049
*1
On state minimum
number
When M8049 is ON, the smallest
number out of active annunciator
relay ranging from S900 to S999 is
stored in D8049.
M8049
[D]8050 to [D]8059 Not used –
*1. Executed at END instruction.
Number and
name
Content of register
Correspond-
ing special
device
Error Detection
[D]8060
If the unit or block corresponding to
a programmed
I/O number is not actually loaded,
M8060 is set to ON and the first
device number of the erroneous
block is written to D8060.
M8060
[D]8061 Error code for PLC hardware error M8061
[D]8062
Error code for PLC/PP
communication error
M8062
[D]8063
Error code for serial
communication error 1 [ch1]
M8063
[D]8064 Error code for parameter error M8064
[D]8065 Error code for syntax error M8065
[D]8066 Error code for ladder error M8066
[D]8067
*2
Error code for operation error M8067
D 8068
*2
Operation error step number
latched
*3
M8068
[D]8069
*2
Error step number of M8065 to
M8067
*4
M8065 to
M8067
*2. Cleared when PLC switches from STOP to RUN.
*3. In case of 32K steps or more, step number is stored in
[D8313, D8312].
*4. In case of 32K steps or more, step number is stored in
[D8315, D8314].
Parallel Link (Refer to Data Communication Edition for details.)
[D]8070
Parallel link error time-out check
time: 500 ms
–
[D]8071
Not used
–
[D]8072 –
[D]8073 –
Number and
name
Content of register
Correspond-
ing special
device
1 0 2 0
1: Input X
0: Output Y
Device number
10 to 337
Example:If X020 is unconnected.
BCD converted
value

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)