Mitsubishi MELSEC Q Series - Page 1173

App-165
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Appendix3 SPECIAL RELAY LIST
SM721
File being
accessed
OFF : File not accessed
ON : File being
accessed
This relay is on while a file is being accessed
by the SP. FWRITE, SP. FREAD, COMRD,
PRC, or LEDC instruction.
S (Status
change)
New
Qn(H)
QnPH
This relay is on while a file is being accessed
by the SP. FWRITE, SP. FREAD, COMRD,
or LEDC instruction.
Qn(H)
QnPH
QnPRH
This relay is on while a file is being accessed
by the SP. FWRITE, SP. FREAD, COMRD,
or SP.DEVST instruction.
QnU
• This relay is on while a file is being
accessed by the SP. FWRITE, SP.
FREAD, COMRD, or SP.DEVST
instruction.
• This relay is on while a SD memory card or
the standard ROM is being accessed.
LCPU
This relay is on while an ATA card or the
standard ROM is being accessed.
QnU
*4
SM722
BIN/DBIN
instruction error
disabling flag
OFF : Error detection
performed
ON : Error detection
not performed
Turned ON when "OPERATION ERROR" is
suppressed for BIN or DBIN instruction.
U
QCPU
LCPU
SM734
XCALL instruction
execution
condition
designation
OFF : Not executed by
execution
condition risen
ON : Executed by
execution
condition risen
• During OFF, XCALL instructions will not be
executed even if execution condition is
risen.
• During ON, XCALL instructions will be
executed when execution condition is
risen.
Qn(H)
*4
SM735
SFC comment
readout
instruction in
execution flag
OFF : SFC comment
readout
instruction is
inactivated.
ON : SFC comment
readout
instruction is
activating.
This relay turns on while a SFC step
comment readout instruction
(S(P).SFCSCOMR) or SFC transmission
condition comment readout instruction (S(P).
SFCTCOMR) is being executed.
S (Status
change)
Qn(H)
*5
QnPH
*6
QnPRH
*6
SM738
MSG instruction
reception flag
OFF : Instruction not
executed
ON : Instruction
execution
This relay turns on when the MSG instruction
is executed.
S (Instruction
execution)
Qn(H)
QnPRH
SM740
Display unit
availability flag
OFF : Not usable
ON : Usable
This relay is on while the display unit can be
used.
S (Initial/Status
change)
LCPU
SM750
Scaling instruction
search method
setting
OFF : Search next
ON : 2-part search
Determines a search method when the
scaling instruction is executed.
U
QnU
*2
LCPU
SM774
PID bumpless
processing
(for complete
derivative)
OFF : Matched
ON : Not matched
Specifies whether to match the set value
(SV) with the process value (PV) or not in
the manual mode.
Q00J/Q00/Q01
*1
Qn(H)
QnPRH
QnU
LCPU
Number Name
Meaning
Explanation
Set by
(When Set)
Corres-
ponding
ACPU
M9
Corresponding
CPU