Mitsubishi Electric MELSEC iQ-R Series - Disabling;Enabling Interrupt Programs; Program Execution Control Instructions

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 RnSFCPURnPCPURnPCPU
(Standard) (Safety)
(Redundant) (Process)
EN ENO