Mitsubishi Electronics FX5 ユーザーズマニュアル

1  PROGRAM EXECUTION
1.4  Execution Type of Program

Set the program execution conditions.

This program type is executed only once when the CPU module changes from the STOP/PAUSE to the RUN status. This 
program type is used for programs, that do not need to be executed from the next scan once they are executed, like initial 
processing on an intelligent function module.

Also, the execution time of initial execution type programs is the same as the initial scan time.
When multiple initial execution type programs are executed, the execution time of the initial execution type programs 
becomes the time until execution of all initial execution type programs is completed.

The precautions for initial execution type programs are explained below.

■Restrictions in programming

With initial execution type programs, do not use instructions that require several scans to complete execution (instructions for 
which completion devices exist).

e.g. RBFM and WBFM instructions

When an initial execution type program is used

Program A

Program B

Control by one program

Initial execution 
type program

Scan execution 
type program

One program can be divided into initial execution 
type and scan execution type program.

Processing performed 

only once

Processing performed 

in every scan

1st scan

2nd scan

3rd scan

STOP/PAUSE→RUN

END processing

Initial execution type program A

Initial execution type program B

Scan execution type program

Initial execution type program C

0

END

0

END

0

0

END

0

END

0

END

Initial scan time is the sum of the execution time of initial execution type programs 
and the END processing time.