Filter
Top Products
11 - 50 11 - 50
MELSEC-Q
11 TROUBLESHOOTING
Special Relay List (Continued)
Number
Name
Meaning
Explanation
Set by
(When Set)
Corresponding
ACPU
M9
Applicable
CPU
SM736
PKEY instruction
execution in
progress flag
OFF : Instruction not
executed
ON : Instruction execution
• ON when PKEY instruction is being executed.
Goes OFF when CR is input, or when input character
string reaches 32 characters.
S
(Instruction
execution)
New
SM737
Keyboard input
reception flag for
PKEY instruction
OFF : Keyboard input
reception enabled
ON : Keyboard input
reception disabled
• Goes ON when keyboard input is being conducted.
Goes when keyboard input has been stored at the CPU.
S
(Instruction
execution)
New
SM738
MSG instruction
reception flag
OFF : Instruction not
executed
ON : Instruction execution
• Goes ON when MSG instruction is executed.
S
(Instruction
execution)
New
SM774
PID bumpless
processing
OFF : Forces match
ON : Does not force match
• In manual mode, designates whether or not to force the
SV value to match the PV value.
U New
OFF : Performs link refresh
ON : Performs no link
refresh
• Selects whether only the general data process is
performed for the execution of the COM instruction or the
link refresh process is also performed.
U New
SM775
Selection of link
refresh
processing during
COM instruction
execution
OFF : Performs all refresh
processes
ON : Performs the refresh
set the SD778
• Selects whether all refresh process or the refresh set with
SD778 is performed when COM instruction is executed.
U New
QCPU
serial
number **
or later
SM776
Enable/disable
local device at
CALL
OFF : Local device disabled
ON : Local device enabled
• Determines whether to enable/disable the local device in
the program CALLED at CALL.
U (Status
change)
New
SM777
Enable/disable
local device in
interrupt program
OFF : Local device disabled
ON : Local device enabled
• Determines whether to enable/disable the local device at
the execution of interrupt programs.
U (Status
change)
New
SM780
CC-Link
dedicated
instruction
executable
OFF : CC-Link dedicated
instruction executable
ON : CC-Link dedicated
instruction not
executable
• Switches ON when the number of the CC-Link dedicated
instructions that can be executed simultaneously reaches
32. Switches OFF when the number goes below 32.
U (Status
change)
New QnA
(7) Debug
Number
Name
Meaning
Explanation
Set by
(When Set)
Corresponding
ACPU
M9
Applicable
CPU
Trace preparation • Switches ON when the trace preparation is completed.
S (Status
change)
New QCPU
SM800
Sampling trace
preparation
OFF : Not ready
ON : Ready
• Goes ON when sampling trace is ready
S (Status
change)
New QnA
Trace start
• Trace started when this goes ON.
• Suspended when OFF (Related special M all OFF)
U M9047 QCPU
SM801
Sampling trace
start
OFF : Suspend
ON : Start
• Sampling trace started when this goes ON
• Suspended when OFF (Related special M all OFF)
U M9047 QnA
Trace execution
in progress
• Switches ON during execution of trace.
S (Status
change)
M9046 QCPU
SM802
Sampling trace
execution in
progress
OFF : Suspend
ON : Start
• Goes ON during execution of sampling trace
S (Status
change)
M9046 QnA
Trace trigger
• Trace is triggered when this relay switches from OFF to
ON. (Identical to TRACE instruction execution status)
U M9044 QCPU
SM803
Sampling trace
trigger
OFF ON: Start
• Sampling trace trigger goes ON when this goes from
OFF to ON (Identical to STRA instruction execution
status)
U M9044 QnA
After trace trigger • Switches ON after trace is triggered.
S (Status
change)
New QCPU
SM804
After sampling
trace trigger
OFF : Not after trigger
ON : After trigger
• Goes ON after sampling trace trigger
S (Status
change)
New QnA
Trace completed • Switches ON at completion of trace.
S (Status
change)
9043 QCPU
SM805
Sampling trace
completed
OFF : Not completed
ON : End
• Goes ON at completion of sampling trace
S (Status
change)
9043 QnA