Mitsubishi Electric MELSEC FX3U - Common Items; How to Disable Interrupt Function and Pulse Catch Function

851
FX3G/FX3U/FX3UC Series Programmable Controllers
Programming Manual - Basic & Applied Instruction Edition
36 Interrupt Function and Pulse Catch Function
36.2 Common Items
31
FNC275-FNC279 Data Transfer 3
32
FNC280-FNC289 High Speed Processing 2
33
FNC290-FNC299 Extension File Register
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
36.2 Common Items
36.2.1 How to disable interrupt function and pulse catch function
This section describes how to disable the interrupt function and pulse catch function.
1. Limiting the program interrupt range [interrupt function and pulse catch function]
1) Programming method
Program the FNC 05 (DI) instruction to set the interrupt disabled zone.
Even if an interrupt is generated between the DI instruction and EI instruction (interrupt disabled zone),
the interrupt is executed after the EI instruction.
2) Program example
3) Cautions
a) The interrupt inputs with special auxiliary relay for interrupt disable (M8050 to M8059) turned ON are
excluded.
These special auxiliary relays are not valid for the pulse catch function.
b) When the disabled zone is long, interrupts are accepted, but the interrupt processing is started after
considerable time.
When the interrupt disabling setting is not required, program only EI instruction. It is not always
necessary to program DI instruction.
Interrupts are
disabled
Interrupts are
enabled
FNC 04
EI
FNC 05
DI
FNC 06
FEND