426
FX3UC Series Programmable Controllers
User’s Manual - Hardware Edition
C Operation of Special Devices (M8000 -, D8000 -)
C-1 Special Auxiliary Relay (M8000 to M8511)
Parallel Link
M 8070
*1
Parallel link Set M8070 when
using master station.
–
M 8071
*1
Parallel link Set M8071 when
using slave station.
–
[M]8072 Parallel link ON when operating
–
[M]8073
Parallel link
ON when M8070 or M8071 setting
is incorrect
–
*1. Cleared when PLC switches from STOP to RUN.
Sampling Trace
[M]8074 Not used
–
[M]8075 Ready request for sampling trace
D8075 to
D8098
[M]8076 Start request for sampling trace
[M]8077 ON during sampling trace
[M]8078
ON when sampling trace is
completed
[M]8079 Sampling trace system area
[M]8080
Not used
–
[M]8081
–
[M]8082
–
[M]8083
–
[M]8084 –
[M]8085
–
[M]8086 –
[M]8087
–
[M]8088
–
[M]8089 –
Flag
[M]8090
*2
BKCMP (FNC194 to FNC199)
instructions - Block comparison
signal
–
M 8091
*2
COMRD (FNC182) and BINDA
(FNC261) instructions - Output
character quantity selector signal
–
[M]8092
Not used
–
[M]8093
–
[M]8094
–
[M]8095
–
[M]8096
–
[M]8097 –
[M]8098
–
High Speed Ring Counter
M 8099
*3
High speed ring counter operation
(in units of 0.1ms, 16 bits)
D8099
[M]8100 Not used
–
*2. Supported in Ver. 2.20 or later
*3. 0.1ms high speed ring counter D8099 will operate after
M8099 turns ON.
Number and
name
Operation and function
Correspond-
ing special
device
Memory Information
[M]8101
Not used
–
[M]8102
–
[M]8103
–
[M]8104
–
[M]8105 ON when writing to flash memory
–
[M]8106 Not used –
[M]8107 Device comment registration check
D8107
[M]8108 Not used –
Output Refresh Error
[M]8109 Output refresh error
–
[M]8110
Not used
–
[M]8111
–
M 8112 –
M 8113
–
M 8114 –
M 8115
–
M 8116
–
M 8117
–
[M]8118
–
[M]8119 –
RS (FNC 80) and Computer Link [ch1]
[M]8120 Not used
–
[M]8121
*4
RS (FNC 80) instruction:
Send wait flag
–
M 8122
*4
RS (FNC 80) instruction:
Send request
D8122
M 8123
*4
RS (FNC 80) instruction:
Receive complete flag
D8123
[M]8124
RS (FNC 80) instruction:
Carrier detection flag
–
[M]8125 Not used
–
[M]8126 Computer link [ch1]: Global ON
D8127
D8128
D8129
[M]8127
Computer link [ch1]:
On-demand send processing
M 8128
Computer link [ch1]:
On-demand error flag
M 8129
Computer link [ch1]:
On-demand Word/Byte changeover
RS (FNC 80) instruction:
Time-out check flag
*4. Cleared when PLC switches from RUN to STOP or RS
instruction is OFF.
Number and
name
Operation and function
Correspond-
ing special
device
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