3 . I ns t r uc ti on Se t3- 4 93. Interrupt subroutines must be placed after the FEND instruction.4. Other interrupts are not allowed during execution of a current interrupt routine.5. When many interruptions occur, the priority is given to the firstly executed interruption. Ifseveral interruptions occur at the same time, the priority is given to the interruption with thesmaller pointer No.6. Any interrupt request occurring between DI and EI instructions will not be executedimmediately. The interrupt will be memorized and executed when the next EI occurs.7. When using the interruption pointer, DO NOT repeatedly use the high-speed counter driven bythe same X input contact.8. When immediate I/O is required during the interruption, write REF instruction in the program toupdate the status of I/OPoints to note:Interrupt pointers (I):a) External interrupts: 8 points including (I000/I001, X0), (I100/I101, X1), (I200/I201, X2),(I300/I301, X3), (I400/I401, X4), (I500/I501, X5), (I600/I601, X6) and (I700/I701, X7) (00designates interruption in falling-edge, 01 designates interruption in rising-edge)b) Timer interrupts: 2 points including I605~I699 and I705~I799 (Timer resolution = 1ms)c) High-speed counter interrupts: 8 points including I010, I020, I030, I040, I050, I060, I070, andI080. (used with API 53 DHSCS instruction to generate interrupt signals)d) Communication interrupts: 3 points including I140, I150 and I160e) Associated flags:Flag FunctionM1050 Disable external interruption I000 / I001M1051 Disable external interruption I100 / I101M1052 Disable external interruption I200 / I201M1053 Disable external interruption I300 / I301M1054 Disable external interruption I400 / I401M1055 Disable external interruption I500 / I501, I600 / I601, I700 / I701M1056 Disable timer interrupts I605~I699M1057 Disable timer interrupts I705~I799M1059 Disable high-speed counter interruptions I010~I080M1280 I000/I001 Reverse interrupt trigger pulse direction (Rising/Falling)M1284 I400/I401 Reverse interrupt trigger pulse direction (Rising/Falling)M1286 I600/I601 Reverse interrupt trigger pulse direction (Rising/Falling)Note: Default setting of I000(X0) is falling-edge triggered. When M1280=ON and EI is enabled,PLC will reverse X0 as rising-edge triggered. To reset X0 as falling-edge, reset M1280 firstand execute DI instruction. After this, X0 will be reset as falling-edge when EI is executedagain.
