ABB AC 31 - 1.2. Calling a sub-program

Program Optimization
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1SBC 260400 R1001-b 06.99
1.2. Calling a sub-program
Once a sub-program is defined, its name is automatically inserted into the list of function
blocks as a function block.
A sub-program is called by using the function block in the main program.
For example: calling the SUB1 program:
The SUB1 is called twice by 2 different conditions.
SUB1
EN
VALID1
SUB1
EN
VALID2
The Instruction List syntax is detailed in the AC31GRAF software documentation.
All of the functions used in the sub-programs have their own values belonging to the sub-
program call. For example, calling a sub-program, which contains a counter, is written twice,
the counter will have 2 different values.
The only exception concerns all of the time based functions such as TON, TOF, ... where their
status is unique, independently of the number of times the sub-program is called within the
program.