Mitsubishi Electronics FX3G User Manual

FX

3S

/FX

3G

/FX

3GC

/FX

3U

/FX

3UC

 Series

Programming Manual - Basic & Applied Instruction Edition

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

 M 8030

*1

Battery LED
OFF

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

→Refer to Subsection 37.2.10.

–

–

–

–

–

 M 8031

*1

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

*3

, and R

*2

 are cleared to zero.

However, file registers (D) in program memory
and extension file registers (ER)

*2

 in the

memory cassette are not cleared. 

→Refer to Subsection 37.2.12.

–

 M 8032

*1

Latch memory
all clear

–

 M 8033
Memory hold
STOP

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

→Refer to Subsection 37.2.13.

–

 M 8034

*1

All outputs disable

All external output contacts of PLC are turned
OFF.

→Refer to Subsection 37.2.14.

–

 M 8035
Forced RUN mode

→Refer to Subsection 37.2.15 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)

→Refer to Data Communication Edition.

D8176 to 

D8180

*4

 M 8039
Constant scan
mode

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

→Refer to Subsection 37.2.16.

D8039

*1.

It is executed when END instruction is executed.

*2.

R and ER are available only in FX

3G

/FX

3GC

/FX

3U

/FX

3UC

 PLCs.

*3.

Special data registers are not cleared in FX

1S

/FX

1N

/FX

1NC

/FX

2N

/FX

2NC

 PLCs.

*4.

It is available in Ver. 2.00 or later.