Outline Of Plc Processing Program (Two Program Method); Independent Program Method - Mitsubishi Electric M800VW Series Programming Manual

M800V/M80V Series PLC Programming Manual (1/2)
2 PLC Processing Program

2.4 Outline of PLC Processing Program (Two Program Method)

2.4 Outline of PLC Processing Program (Two Program Method)
The M8V Series program execution control methods include the conventional method which controls with one program, and
the method that splits the program into multiple sections for each control unit.
When splitting into multiple programs, the order for executing the split programs can be designated on the setting screen. This
is called the multi-programming function.
 Method controlling with one program (conventional method): Independent program method
 Method splitting control into multiple programs: Multi-program method
Control with one program
(Independent control method)
Control details A
Control details B
Control details n

2.5 Independent Program Method

This method lays importance on compatibility with the conventional models.
One sequence program can be stored. The execution type and head of processing are designated with reserved labels.
The execution type and execution order cannot be designated on the setting screen.
 Initialization process (reserved label P4003): This starts up only once when the power is turned ON.
 High-speed process (reserved label P4001): This starts up at the standard interrupt cycle.
 Main process (reserved label P4002): This starts up constantly except during the high-speed process.
Structured text cannot be used with the independent program method.
Control by splitting into multiple
programs (Multi-program method)
Program A
Control details A
Program B
Control details B
Split and register for
each control detail
Program n
Control details n
9 IB-1501667-B