5 Basic Instruction
5.8 INV
85
FXCPU Structured Programming Manual
(Basic & Applied Instruction)
1
Outline
2
Instruction List
3
Configuration of
Instruction
4
How to Read
Explanation of
Instructions
5
Basic Instruction
6
Step Ladder
Instructions
7
Applied
Instructions
8
Interrupt Function
and Pulse Catch
Function
A
Relationships
between devices
and addresses
Function and operation explanation
1. INV(inverts the result of operations)
In the figure above, Y000 turns ON when X000 is OFF, and Y000 turns OFF when X000 is ON.
INV instruction can be used in a same position as serial contact instructions (AND, ANI, ANDP and ANDF).
Different from LD, LDI, LDP and LDF instructions shown in the list, INV instruction cannot execute connection
to bus lines. Different from OR, ORI, ORP and ORF instructions, INV instruction cannot be used
independently in parallel to a contact instruction.
2. Operation range of INV instruction
When INV instruction is used in a complicated circuit containing ORB and ANB instructions, the operation
range of INV instruction is as shown in the figure below:
INV instruction inverts the operation result after LD, LDI, LDP or LDF instruction located before INV
instruction.
Accordingly, if INV instructions are used inside ORB and ANB instructions, blocks after LD, LDI, LDP or LDF
instruction seen from each INV instruction are regarded as the target of INV operation.
X000
Y000:= INV(X000)
[Structured ladder]
[ ST ]
INV
EN ENO
Y000
X000
Y000
OFF
ON
OFF
ON
ON
OFF
Timing chart
Operation result until just
before INV instruction
Operation result after INV
instruction is executed
OFF ON
ON OFF
Inverted
INV
EN ENO
INV
EN ENO
INV
EN ENO
INV
EN ENO
LD
LD
INV
EN ENO
LD
INV
EN ENO
INV
EN ENO
INV
EN ENO
INV
EN ENO
LD
LD
INV
EN ENO
LD
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