Mitsubishi Electric MELSEC iQ-R Series, Programming Manual

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7 APPLICATION INSTRUCTIONS
7.3 Program Execution Control Instructions
541
7
7.3
Program Execution Control Instructions
Disabling/enabling interrupt programs
DI, EI
• DI: This instruction disables execution of interrupt programs.
• EI: This instruction clears the interrupt disabled state.
■
Execution condition
Processing details
■
DI
• This instruction disables execution of interrupt programs until the EI instruction is executed even though they are
requested.
• When the system is powered on or the CPU module is reset, the system is in the state where the DI instruction has been
executed.
• For the operation of the DI (Disabling interrupt programs) instruction used with the DI (Disabling interrupt programs with
specified priority or lower) instruction, refer to the following.

Page 544 DI
• The DI (Disabling interrupt programs) instruction cannot be executed in interrupt programs. If executed, no processing is
performed.
Ladder ST
ENO:=DI(EN);
ENO:=EI(EN);
FBD/LD
Instruction Execution condition
DI
EI Every scan
RnCPU RnENCPU
RnSFCPU RnSFCPU RnPCPU RnPCPU
(Standard) (Safety) (Redundant) (Process)
EN ENO