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7. Basic Commands
FF
- 134 -
{ FF ... Bit device output inversion
Usable device
Bit device Word device
Con-
stant
Pointer
X Y M L F BSB T SM VTCDRWSWZSDKH P
Digit
desig-
nation
Index
No. of
steps
{ { { { { {
{
{
7
Setting data
D
Device number
to invert
Inversion command
FF
FF D
Function
(1) The status of the device designated by D is inverted when the inversion command turns from
OFF to ON.
Device status
Device
Before FF execution After FF execution
OFF ON
Bit device
ON OFF
0 1
Designation of word device
1 0
Program example
(1) Program to invert the output of Y10 when X9 turns ON.
[Timing Chart]
ON
X9
Y10
ON
OFF
OFF
Coding
No. of
steps
Com-
Mand
Device
10 LD X9
11 FF Y10
0 FF Y10
X9
18