FX3U Series Programmable Controllers
User’s Manual - Hardware Edition
483
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
E
Precautions for
battery
transportation
F
Handling of
batteries in EU
member states
Sampling Trace
*1
[D]8074
These devices are occupied by the
PLC system when the sampling
trace function is used in the
personal computer
*1
.
M8075 to
M8079
[D]8075
[D]8076
[D]8077
[D]8078
[D]8079
[D]8080
[D]8081
[D]8082
[D]8083
[D]8084
[D]8085
[D]8086
[D]8087
[D]8088
[D]8089
[D]8090
[D]8091
[D]8092
[D]8093
[D]8094
[D]8095
[D]8096
[D]8097
[D]8098
*1. The sampling trace devices are used by peripheral
equipment.
High-Speed Ring Counter
D 8099
Up-operation high-speed ring
counter of 0 to 32,767 (in 0.1ms
units, 16-bit)
*2
M8099
[D]8100 Not used –
*2. 0.1ms high-speed ring counter D8099 will operate after
M8099 turns ON.
Memory Information
[D]8101
PLC type and
system version
–
[D]8102
2 ...... 2K steps
4 ...... 4K steps
8 ...... 8K steps
16 .... 16K steps
64 .... 64K steps
–
[D]8103
Not used
–
[D]8104 –
[D]8105 –
[D]8106 –
[D]8107
Number of registered device comments
M8107
[D]8108
Number of special function units/
blocks connected
–
Number and
name
Content of register
Correspond-
ing special
device
BCD converted
value
1 6 2 2 0
FX
3U
/
FX
3UC
Version 2.20
Output Refresh Error
[D]8109
Y number where output refresh
error occurs
M8109
[D]8110 to [D]8119
Not used –
RS (FNC 80) and Computer Link [ch1]
D 8120
*3
RS (FNC 80) instruction and
computer link [ch1]
Communication format setting
–
D 8121
*3
Computer link [ch1]
Station number setting
–
[D]8122
*4
RS (FNC 80) instruction:
Remaining points of transmit data
M8122
[D]8123
*4
RS (FNC 80) instruction:
Monitoring receive data points
M8123
D 8124
RS (FNC 80) instruction:
Header <Default: STX>
–
D 8125
RS (FNC 80) instruction:
Terminator <Default: ETX>
–
[D]8126 Not used –
D 8127
Computer link [ch1]
Specification of on-demand head
device register
M8126 to
M8129
D 8128
Computer link [ch1]
Specification of on-demand data
length register
D 8129
*3
RS (FNC 80) instruction, computer
link [ch1]
Time-out time setting
*3. Latched (battery backed) device. For details, refer to the
programming manual.
*4. Cleared when PLC switches from RUN to STOP.
Number and
name
Content of register
Correspond-
ing special
device
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