6
-
56
(4) Execution timing in low-speed execution type program
In the low-speed execution type program, data are written in the RUN status at END processing in the scan
following the scan where execution of all the programs are completed.
Note that the execution of the programs is suspended during online change.
1): Online change command of scan execution type program
2): Online change execution of scan execution type program
3): Online change command of low-speed execution type program
4): Online change execution of low-speed execution type program
(5) Online change during execution of the PLOADP, PUNLOADP, or PSWAPP
instruction
Online change is suspended until execution of these instructions are completed.
If any of the instructions is executed during online change, the processing does not start until the online change is
completed.
Note10
Figure 6.41 Online change at execution of low-speed execution type program
Note6.6
For the Basic model QCPU and Redundant CPU, the low-speed execution type program cannot be used.
Basic
Redundant
Note6.7
The Basic model QCPU and Redundant CPU cannot change a program file in the RUN status with the PLOAP,
PUNLOADP, or PSWAPP instruction.
Basic
Redundant
Scan execution type
program
Step 0 to END
Scan execution type
program
Step 0 to END
Step 0 to END
Scan execution type
program
Step 0 to END
1)
2)
3)
Low-speed execution
type program
Step 0 to 200
Low-speed execution
type program
Step 201 to 320
Scan execution type
program
Low-speed execution
type program
Step 321 to END
Low-speed execution
type program
Step 0 to 120
4)
1 scan
1 scan
1 scan
1 scan
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