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3.1 Sequence Program
3.1.3 Interrupt programs
3
SEQUENCE PROGRAM CONFIGURATION AND
EXECUTION CONDITIONS
2) High Performance model QCPU or Process CPU
• Special registers
SD520, SD521 : Current scan time
SD522, SD523 : Initial scan time
SD524, SD525 : Minimum scan time
SD526, SD527 : Maximum scan time
SD528, SD529 : Current scan time for low speed execution type program
SD532, SD533 : Minimum scan time for low speed execution type
program
SD534, SD535 : Maximum scan time for low speed execution type
program
SD540, SD541 : END processing time
SD542, SD543 : Constant scan wait time
SD544, SD545 : Cumulative execution time for low speed execution type
programs
SD546, SD547 : Execution time for low speed execution type programs
SD548, SD549 : Scan execution type program execution time
SD551, SD552 : Service interval time
• Monitor values of GX Developer
Execution time measurement
Scan time measurement
Constant scan
3) Redundant CPU
• Special registers
SD520, SD521 : Current scan time
SD522, SD523 : Initial scan time
SD524, SD525 : Minimum scan time
SD526, SD527 : Maximum scan time
SD540, SD541 : END processing time
SD542, SD543 : Constant scan wait time
SD548, SD549 : Scan execution type program execution time
SD551, SD552 : Service interval time
• Monitor values of GX Developer
Execution time measurement
Scan time measurement
Constant scan
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