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MELSEC-Q/QnA
5 SEQUENCE INSTRUCTIONS
High Performance
QnA Q4AR
Basic
QCPU
PLC CPU
Process CPU
5.3.9 Bit device output reverse (FF)
Usable Devices
Internal Devices
(System, User)
MELSECNET/10(H)
Direct J
\
Other
Set
Data
Bit Word
File
Register
Bit Word
Special
Function
Module
U
\G
Index
Register
Zn
Constant
K, H
DY
D
[Instruction Symbol] [Execution Condition]
reverse command
FF
D
FF
[Set Data]
Set Data Meaning Data Type
D
Device number to reverse Bit
[Functions]
(1) The status of the device designated by
D
is reversed when the inversion command goes from
OFF to ON.
Device Status
Device
Prior to FF execution After FF execution
OFF ON
Bit device
ON OFF
01
Designation of word device
10
[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] [List Mode]
Steps
Instruction
Device
[Timing Chart]
ON
X9
Y10
ON
OFF
OFF
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