LSIS XEC-DR64H - Page 65

Chapter 5. Program Configuration and Operation Method
5-18
Process per time
Time (㎳)
Process
0 Scan started and scan program started to execute.
0~6 Scan program is executed.
6~8
Scan program is stop because execution external I/O (P000) is requested. And program
3 is executed. Request of execution at 7[ms] is ignored because program 3 has been
executing.
8~10 Program 3 is finished and Scan program is continued.
10~12
Scan program is stop by request of ‘10
㎳
_Cycle time’ interrupt signal and execute program
1.
12~20 Program 1 is finished and Scan program is continued.
20
Request of ‘Cycle time’ interrupt signal and ‘External I/O (P000)’ signal is occurred
concurrently but priority of ‘External I/O’ signal is higher than ‘Cycle time’ interrupt signal
so program 3 is executed and program 1 is standby.
20~22 Program 3 is finished and Scan program is continued.
22~24 After program 3 is completed, program 1 (the program of ‘10ms_Cycle time’ is executed.
24~25 P1 execution completed and the stopped scan program execution finished
25
At the finished point of scan program, check the request of Internal device ‘M000’
execution and execute program 2.
25~30 Program P2 is executed.
30~32
When ‘10
㎳
_Cycle time’ interrupt signal is occurred, the priority of that is higher than Internal
device ‘M000’ though program 2 is stopped and program 1 is executed.
32~34 P1 executed completed and the stopped P2 execution finished
34 New scan starts (Start scan program execution)
PO executed
P1 executed
10ms_Cycle time
Program 2
Internal device_%MX0
Program 3
External I/O_%IX0.0.0
Time
0
6
7
8
10
12
20
22
24
25
30
32
34
Scan started
(Initial operation started)
Scan program stopped
New scan started