Bit Device Output Reverse (Ff) - Mitsubishi MELSEC QCPU Programming Manual

5 SEQUENCE INSTRUCTIONS

5.3.9 Bit device output reverse (FF)

Internal Devices
Set
(System, User)
Data
Bit Word
D
[Instruction Symbol] [Execution Condition]
FF
[Set Data]
Set Data
D
[Functions]
(1) The status of the device designated by
OFF to ON.
Device
Bit device
Designation of word device
[Operation Errors]
(1) There are no operation errors associated with the FF instruction.
[Program Example]
(1) The following program reverses the output of Y10 when X9 goes ON.
[Ladder Mode]
[Timing Chart]
X9 OFF
Y10 OFF
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MELSECNET/10(H)
File Direct J \
Register
Bit
reverse command
Device number to reverse
Prior to FF execution
ON
ON
QCPU
PLC CPU
Basic
High Performance
Usable Devices
Special
Function
Module
Word
U \G
Meaning
is reversed when the inversion command goes from
D
Device Status
OFF
ON
0
1
[List Mode]
Instruction
Steps
MELSEC-Q/QnA
QnA
Process CPU
Index Other
Constant
Register
K, H
Zn
FF
D
Data Type
Bit
After FF execution
ON
OFF
1
0
Device
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Q4AR
DY