APPENDICES
APP - 9
MELSEC-
Table 2.1 Special relay list (Continue)
Number Name Description Details Applicable CPU
M9046 Sampling trace
OFF: Except during trace
ON: During trace
• Switched on during sampling trace.
Unusable with A1
and A1N.
M9047
Sampling trace
preparation
OFF: Sampling trace stop
ON: Sampling trace start
• Turn on M9047 to execute sampling trace.
Sampling trace is interrupted if M9047 is turned off.
Unusable with A1
and A1N.
2
M9048
RUN LED flicker
flag
ON: Flickers at
annunciator on.
OFF: No flicker at
annunciator on.
• Sets whether the RUN LED flickers or not when the
annunciator relay F
is turned on when the A0J2H
is used.
—
Usable with A0J2H.
M9048
Memory card
battery voltage
detection
OFF: Low voltage is not
detected.
ON: Low voltage is
detected.
• Turned ON when the drop in the battery voltage for
the memory card is detected. (Automatically turned
OFF when the voltage recovers to normal.)
—
Dedicated to
QCPU-A (A Mode)
M9049
Switching the
number of output
characters
OFF: Up to NUL code are
output.
ON: 16 characters are
output.
• When M9049 is off, up to NUL (00
H
) code are output.
• When M9049 is on, ASCII codes of 16 characters
are output.
Unusable with An,
A3V, A2C and
A52G
2
M9050
Operation result
storage memory
change contact
(for CHG
instruction)
OFF: Not changed
ON: Changed
• Switched on to exchange the operation result storage
memory data and the save area data.
—
Dedicated to A3
M9051
CHG
instruction
execution disable
OFF: Enable
ON: Disable
• Switched on to disable the CHG
instruction.
• Switched on when program transfer is requested and
automatically switched off when transfer is complete.
—
Usable with A3,
A3N, A3H, A3M,
A3V, A3A, A3U,
A4U, A73 and A3N
board
2
M9052
SEG instruction
switching
OFF: 7SEG display
ON: Partial refresh
• Switched on to execute the SEG
instruction as a
partial refresh instruction.
Switched off to execute the SEG
instruction as a
7SEG display instruction.
Unusable with An,
A3H, A3M, A3V,
AnA, AnU, A3V
and A3A board
2
M9053
EI
/ DI
instruction
switching
OFF: Sequence interrupt
control
ON: Link interrupt
control
• Switched on to execute the link refresh enable,
disable (EI, DI) instructions.
Unusable with An,
A3V and A3N
board
M9054 STEP RUN flag
OFF: Other than step run
ON: During step run
• Switched on when the RUN key switch is in STEP
RUN position.
Unusable with An,
AnS, AnSH, A1FX,
A2C, A0J2H, and
A52G
M9055
Status latch
complete flag
OFF: Not complete
ON: Complete
• Turned on when status latch is completed. Turned off
by reset instruction.
Unusable with A1
and A1N.
M9056
Main program
P, I set request
OFF: Other than P, I set
request
ON: P, I set request
M9057
Subprogram 1
P, I set request
—
Usable with A3,
A3N, A3H, A3M,
A3V, A3A, A73,
A3U, A4U and A3N
board
M9060
Subprogram 2
P, I set request
M9061
Subprogram 3
P, I set request
OFF: Except during P, I
set request
ON: During P, I set
request
• Provides P, I set request after transfer of the other
program (for example subprogram when main
program is being run) is complete during run.
Automatically switched off when P, I setting is
complete.
—
Dedicated to A4U
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