7 Applied Instructions
7.1 Program Flow
131
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
7.1.6 EI
Outline
Interrupts are usually disabled in PLCs. This instruction enables interrupts in PLCs.
Use this instruction for using the input interrupt, timer interrupt and counter interrupt functions.
1. Format and operation, execution form
2. Set data
3. Applicable devices
Function and operation explanation
EI instruction is the independent type, and does not require command (drive) contact.
FX3U(C) FX3G FX2N(C) FX1N(C) FX1S FXU/FX2C FX0N FX0(S)
Instruction
name
Operation
Execution
form
Expression in each language
Structured ladder ST
EI 16 bits Continuous EI(EN);
Variable Description Data type
Input
variable
EN Input condition Always TRUE
Output
variable
ENO Input status Bit
Operand
type
Bit Devices Word Devices Others
System User Digit Specification
System
User
Special
Unit
Index
Constant
Real
Number
Character
String
Pointer
XYMTCS
D.b
KnX KnY KnM KnS T C D R
U\G
VZModifier K H E
""
P
- No target device is available.
EI
EN ENO
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