Mitsubishi MELSEC Q Series - Page 343

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DI,EI,IMASK
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6.6 Program Execution Control Instructions 6.6.1 Interrupt disable/enable instructions, interrupt program mask (DI,EI,IMASK)
1. An interrupt pointer occupies 1 step.
• For the information on interrupt conditions, link direct devices, refer to the
QnUCPU User’s Manual(Function Explanation, Program Fundamentals) or
Qn(H)/QnPH/QnPRHCPU User’s Manuall(Function Explanation, Program
Fundamentals)
2. The DI state (interrupt disabled) is active during the execution of an interrupt
program. Do not insert the EI instructions in interrupt programs to attempt the
execution of multiple interrupts, with interrupt programs running inside interrupt
programs.
3. If there are the EI and DI instructions within a master control, these instructions
will be executed regardless of the execution/non-execution status of the MC
instruction.
X1C
55
53
50
Y10
Y30
X5
Stored at step 50
IRET
T10