Справочник Пользователя для Mitsubishi Electronics FX3S-MT/DSS

Appendix A: Special Device List

FX

3S

 Series Programmable Controllers

User's Manual - Hardware Edition

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Spec
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The device numbers and functions of the special auxiliary relays (indicated as "special M" in tables) and
special data registers (indicated as "special D" in tables) are shown below.
Note that functions of certain devices vary depending on the series of the PLC.
Do not use the undefined/blank special auxiliary relays and special data registers in the sequence program
since they are occupied by the CPU.
In addition, do not activate or write to the devices with brackets on the first letter such as [M]8000 or [D]8001
in the program.

For detailed explanation, refer to the Programming Manual.

*1. Cleared when PLC switches from RUN to STOP.
*2. Executed at END instruction.

[M]8000
RUN monitor
NO contact

-

[M]8001
RUN monitor
NC contact

-

[M]8002
Initial pulse
NO contact

-

[M]8003
Initial pulse
NC contact

-

[M]8004
Error occurrence

ON when either M8061, M8062,
M8064, M8065, M8066, or M8067 is
ON.

D8004

[M]8005 to [M]8009 Not used

-

[M]8010

Not used

-

[M]8011
10 ms clock pulse

ON and OFF in 10 ms cycle
(ON: 5 ms, OFF: 5 ms)

-

[M]8012
100 ms clock pulse

ON and OFF in 100 ms cycle
(ON: 50 ms, OFF: 50 ms)

-

[M]8013
1 sec clock pulse

ON and OFF in 1 sec cycle
(ON: 500 ms, OFF: 500 ms)

-

[M]8014
1 min clock pulse

ON and OFF in 1 min cycle
(ON: 30 sec, OFF: 30 sec)

-

 M 8015

Clock stop and preset
For real time clock

-

 M 8016

Time read display is stopped
For real time clock

-

 M 8017

±30 seconds correction
For real time clock

-

[M]8018

Installation detection (Always ON)
For real time clock

-

 M 8019

Real time clock (RTC) error
For real time clock

-

1 scan time

RUN

input

M8000

M8001

M8002

M8003

M8061

Error occurrence

[M]8020
Zero

ON when the result of addition/
subtraction is 0.

-

[M]8021
Borrow

ON when the result of subtraction is
less than the min. negative number.

-

 M 8022
Carry

ON when 'carry' occurs as a result
of addition or when an overflow
occurs as a result of shift operation.

-

[M]8023

Not used

-

 M 8024

*1

BMOV instruction (FNC 15) 
direction specification

-

[M]8025 to [M]8027 Not used

-

 M 8028

100 ms/10 ms timer changeover

-

[M]8029
Instruction
execution complete

ON when operation such as DSW
instruction (FNC 72) is completed.

-

 M 8030

Not used

-

 M 8031

*2

Non-latch memory
all clear

If this special auxiliary relay is 
activated, the ON/OFF image 
memory of Y, M, S, T, and C, and
present values of T, C, D and 
special data registers are cleared to
zero.
However, file registers (D) in 
program memory.

-

 M 8032

*2

Latch memory all
clear

-

 M 8033
Memory hold STOP

When PLC is switched from RUN to
STOP, image memory and data
memory are retained.

-

 M 8034

*2

All outputs disable

All external output contacts of PLC
are turned OFF.

-

 M 8035
Forced RUN mode

Refer to Programming Manual for
details.

-

 M 8036
Forced RUN signal

-

 M 8037
Forced STOP 
signal

-

[M]8038
Parameter setting

Communication parameter setting
flag (for N:N network setting)

D8176 to 

D8180

 M 8039
Constant scan 
mode

When M8039 is ON, PLC waits until
scan time specified in D8039 and
then executes cyclic operation.

D8039