Mitsubishi FX2-16E series User Manual Download Page 482

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474

Series Programmable Controllers

User’s Manual - Hardware Edition

A Operation of Special Devices (M8000 -, D8000 -)

A-1 Special Auxiliary Relay (M8000 to M8511)

PLC Mode

M 8030

Battery LED OFF

When M8030 set to ON, LED on
PLC is not lit even if low battery
voltage is detected.

–

M 8031

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, special
data registers and R are cleared to
zero.
However, file registers (D) in
program memory, and extension
file registers (ER) in the memory
cassette are not cleared.

–

M 8032

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

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

*1. Executed at END instruction

Step Ladder and Annunciator

M 8040
Transfer disable

While M8040 is turned ON, transfer
between states is disabled.

–

[M]8041

Transfer start

Transfer from initial state is enabled
in automatic operation mode.

–

[M]8042
Start pulse

Pulse output is given in response
to a start input.

–

M 8043

Zero return
complete

Set this in the last state of zero
return mode.

–

M 8044

Zero point condition

Set this when machine zero return
is detected.

–

M 8045
All output reset
disable

Disables the ’all output reset’
function when the operation mode
is changed.

–

[M]8046

STL state ON

ON when M8047 is ON and either
of S0 to S899 or S1000 to S4095 is
active.

M8047

M 8047

STL monitoring
enable

D8040 to D8047 are enabled when
M8047 is ON.

D8040 to

D8047

[M]8048

Annunciator
operate

ON when M8049 is ON and either
of S900 to S999 is ON.

–

M 8049

Annunciator
enable

D8049 is enabled when M8049 is
ON.

D8049

M8048

*2. Cleared when PLC switches from RUN to STOP.

*3. Executed at END instruction.

Number and

name

Operation and function

Correspond-

ing special

device

Interrupt Disable

M8050
(input interrupt)
I00 disable

• If an input interrupt or timer

interrupt occurs while a special
auxiliary relay for that interrupt
(M8050 - M8058) is ON, the
interrupt will not operate.
For example, turning M8050 ON
disables the I00 interrupt;
hence, the interrupt routine is not
processed even in an allowable
program area.

• If an input interrupt or timer

interrupt occurs while a special
auxiliary relay for that interrupt
(M8050 - M8058) is OFF,

a) The interrupt will be

accepted.

b) The interrupt routine will be

processed promptly if it is
permitted by the EI (FNC
04) instruction. However, if
the DI (FNC 05) instruction
disables interrupts, the
interrupt program will not
be processed until EI (FNC
04) permits the interrupts.

–

M8051
(input interrupt)
I10 disable

–

M8052
(input interrupt)
I20 disable

–

M8053
(input interrupt)
I30 disable

–

M8054
(input interrupt)
I40 disable

–

M8055
(input interrupt)
I50 disable

–

M8056
(Timer interrupt)
I6