Mitsubishi Electric MELSEC iQ-R Series - Page 711

APPX
Appendix 7 Processing Time
709
A
Overhead time at execution of interrupt/fixed scan execution type program
This section describes each overhead time when each of the interrupt programs and fixed scan execution type programs is
executed.
The processing time for the interrupt program and fixed scan execution type program is as shown below.
Instruction processing time for each instruction + Overhead time + Each refresh processing time (when
setting)
■Overhead time when executing the interrupt program
The overhead time when executing the interrupt program includes the one before executing the interrupt program and the
other when the interrupt program finished.
• Overhead time before executing the interrupt program
• Overhead time when finishing the interrupt program
■Overhead time when executing the fixed scan execution type program
The following table lists the overhead times when executing the fixed scan execution type program.
Interrupt factor Condition Overhead time
Internal timer interrupt (I28 to I31) Saves/stores the file register (R) block number. 19.5s
Not save/store the file register (R) block number. 12.9s
Inter-module synchronous interrupt (I44) Saves/stores the file register (R) block number. 25.4s
Not save/store the file register (R) block number. 17.0s
Multiple CPU synchronous interrupt (I45) Saves/stores the file register (R) block number. 24.2s
Not save/store the file register (R) block number. 16.1s
High-speed internal timer interrupt 2 (I48), high-speed internal
timer interrupt 1 (I49)
Saves/stores the file register (R) block number. 25.8s
Not save/store the file register (R) block number. 18.1s
Interrupt from module (I0 to I15, I50 to I1023) Saves/stores the file register (R) block number. 19.1s
Not save/store the file register (R) block number. 12.8s
Interrupt factor Condition Overhead time
Internal timer interrupt (I28 to I31) Saves/stores the file register (R) block number. 16.0s
Not save/store the file register (R) block number. 8.5s
Inter-module synchronous interrupt (I44) Saves/stores the file register (R) block number. 19.0s
Not save/store the file register (R) block number. 11.4s
Multiple CPU synchronous interrupt (I45) Saves/stores the file register (R) block number. 18.7s
Not save/store the file register (R) block number. 10.5s
High-speed internal timer interrupt 2 (I48), high-speed internal
timer interrupt 1 (I49)
Saves/stores the file register (R) block number. 19.4s
Not save/store the file register (R) block number. 10.3s
Interrupt from module (I0 to I15, I50 to I1023) Saves/stores the file register (R) block number. 15.7s
Not save/store the file register (R) block number. 8.5s
Condition Overhead time
Saves/stores the file register (R) block number. 37.9s
Not save/store the file register (R) block number. 20.6s