Changing The Program Execution Type - Mitsubishi 00JCPU User Manual

2.3.6 Changing the program execution type

(1) Changing the execution type using instructions
(a) Instructions used to change the execution type
The execution type of sequence programs can be changed using instructions even during execution.
Use the PSCAN, PLOW,
Initial execution
type program
PSTOP,
POFF instruction
Execution type before
change
Scan execution type Remains unchanged.
Changes to the scan execution
Initial execution type
type.
Changes to the scan execution
Stand-by type
type.
Stops execution of the low-
speed execution type program
Low-speed execution type and changes to the scan
execution type in the next scan.
(Executed from the step 0.)
Changes to the scan execution
Fixed scan execution type
type.
Once the fixed scan execution type program is changed to another execution type, the type cannot be returned to the fixed
scan execution type.
Note6
Note2.6
Redundant
The Redundant CPU does not support the use of low-speed execution type programs.
, PSTOP, or POFF instruction to change the execution
Note2.6
PSCAN
instruction
Scan execution
type program
PSTOP,
PSCAN PLOW
POFF
instruction instruction
instruction
PLOW
instruction
Stand-by type
program
PSTOP,
POFF instruction
PSTOP,
POFF instruction
Figure 2.42 Pattern of execution type change
Table2.3 Timing of execution type change
PSCAN PSTOP
Changes to the stand-by
type.
Changes to the stand-by
type.
Remains unchanged.
Stops execution of the low-
speed execution type
program and changes to the
stand-by type.
Changes to the stand-by
type.
CHAPTER2 SEQUENCE PROGRAMS
PSCAN
instruction
Fixed scan execution
type program
PSCAN
PLOW
instruction
instruction
Low-speed execution
type program
PLOW
instruction
Instruction
POFF
Turns off outputs in the next
scan.
Changes to the stand-by type
in two scans later.
Turns off outputs in the next
scan.
Changes to the stand-by type
in two scans later.
No processing
Stops execution of the low-
speed execution type
program and turns off outputs
in the next scan.
Changes to the stand-by type
in two scans later.
Turns off outputs in the next
scan.
Changes to the stand-by type
in two scans later.
type.Note6
PLOW
Changes to the low-speed
execution type.
Remains unchanged.
Changes to the low-speed
execution type.
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