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5-40

FF

Bit device output reverse (FF)

FF

Function

(1) Reverses the output status of the device designated by 

 when the execution command is 

turned OFF ON.

Operation Error

(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]

[Timing Chart]

: Device number of the device to be reversed (bits)

Setting 

Data

Internal Devices 

R, ZR

J

\

U

\G

Zn

Constants

Other

DY

Bit

Word

Bit

Word

––

Device

Device Status

Prior to FF Execution

After FF Execution

Bit device

OFF

ON

ON

OFF

Bit designated for word device

0

1

1

0

Command

FF

D

FF

D

D

D

Step

Instruction

Device

ON

X9

Y10

ON

OFF

OFF