Filter
Top Products
813
FX3S/FX3G/FX3GC/FX3U/FX3UC Series
Programming Manual - Basic & Applied Instruction Edition
36 Interrupt Function and Pulse Catch Function
36.4 Input interrupt (Interrupt by External Signal) [With Delay Function]
31
FNC277-FNC279
Data
Transfer 3
32
FNC280-FNC289
High-Speed
Processing 2
33
FNC290-FNC299
Extension File
Register Control
34
FNC300-FNC305
FX
3U
-CF-ADP
35
SFC•STL
Programming
36
Interrupt
Function
37
Special Device
38
Error Code
A
Version Up
Information
B
Execution Times
36.4 Input interrupt (Interrupt by External Signal) [With Delay Function]
1. Outline
An input interrupt has the function to delay execution of an interrupt routine in units of 1 ms.
The delay time can be specified using the pattern program shown below.
By using the delay function, the mounting position of a sensor used for input interrupts can be adjusted electrically
without changing the actual position.
2. Programming procedure
3. Timing chart
36.5 Timer Interrupt (Interrupt in Constant Cycle)
36.5.1 Timer interrupt (interrupt in constant cycle)
1. Outline
An interrupt routine is executed at every 10 to 99 ms without being affected by the operation cycle of a PLC.
2. Application
This type of interrupt is suitable when a certain program should be executed at high-speed while the main program
operation time is long or when a program should be executed at a constant time interval in sequence operations.
M8393
FNC 12
MOV
K*
Delay time specification program
Make sure to describe the delay time specification
program shown on the left at the head of an interrupt
routine program. Do not add, change, or delete this
routine program when writing during RUN.
Interrupt programs may not operate normally.
Because this program is a pattern program, change
only the delay time ([1]).
Only a constant (K) or data register (D) is available
for specifying the time here*. If any other device or
constant is used, the delay time setting becomes
invalid and the interrupt functions as a normal input
interrupt. If the contents of the set data register (D) are
"0", the delay time is regarded as "0".
D8393
[1] Delay time (unit: ms)
FNC 03
IRET
Program to be executed as input interrupt
Contact for setting delay time
•
End of interrupt program.
•
I
Interrupt input
(X000 to X005)
Interrupt program is
executed
Because the previous interrupt processing
is not completed, the interrupt processing
is not executed here.
Valid
Delay time
(msec)
IRET
instruction