Mitsubishi Electric MELSEC iQ-R Series Programming Manual page 550

• When the DI (Disabling interrupt programs with specified priority or lower) instruction and the DI (Disabling interrupt programs) instruction are executed in this
order
(1)
A
EI DI K2
t
A: Scan execution type program
(1) Interrupt enabled section for all priorities
(2) Interrupt disabled section for priority 2 to 8 (Interrupt enabled section for priority 1)
(3) Interrupt disabled section for priority 1 to 8 (Interrupt disabled section for all priorities)
• When the DI (Disabling interrupt programs) instruction and the DI (Disabling interrupt programs with specified priority or lower) instruction are executed in this
order
(1)
A
EI
t
A: Scan execution type program
(1) Interrupt enabled section for all priorities
(2) Interrupt disabled section for priority 1 to 8 (Interrupt disabled section for all priorities)
Operation error
Error code Description
(SD0)
3362H More than 16 DI (Disabling interrupt programs) instructions and DI (Disabling interrupt programs with specified priority or lower)
instructions are nested.
3405H The priority specified by (s) is out of the range, 1 to 8.
7 APPLICATION INSTRUCTIONS
548
7.3 Program Execution Control Instructions
(2) (3)
DI DI
DI DI DI K2
(2)
EI EI EI
(2)
EI EI
(1)
(1)