FUNCTION FC 2 : VOID
TITLE =
VERSION : 0.1


VAR_INPUT
In : BOOL ;
END_VAR
BEGIN
NETWORK
TITLE =


A #In;
SAVE ;

END_FUNCTION

ORGANIZATION_BLOCK OB 1
TITLE = "Main Program Sweep (Cycle)"
VERSION : 0.1


VAR_TEMP
OB1_EV_CLASS : BYTE ; //Bits 0-3 = 1 (Coming event), Bits 4-7 = 1 (Event class 1)
OB1_SCAN_1 : BYTE ; //1 (Cold restart scan 1 of OB 1), 3 (Scan 2-n of OB 1)
OB1_PRIORITY : BYTE ; //Priority of OB Execution
OB1_OB_NUMBR : BYTE ; //1 (Organization block 1, OB1)
OB1_RESERVED_1 : BYTE ; //Reserved for system
OB1_RESERVED_2 : BYTE ; //Reserved for system
OB1_PREV_CYCLE : INT ; //Cycle time of previous OB1 scan (milliseconds)
OB1_MIN_CYCLE : INT ; //Minimum cycle time of OB1 (milliseconds)
OB1_MAX_CYCLE : INT ; //Maximum cycle time of OB1 (milliseconds)
OB1_DATE_TIME : DATE_AND_TIME ; //Date and time OB1 started
END_VAR
BEGIN
NETWORK
TITLE =

A( ;
A I 0.0;
= L 20.0;
BLD 103;
CALL FC 2 (
In := L 20.0);
A BR;
) ;
JNB _001;
L 1;
T MW 0;
_001: NOP 0;
NETWORK
TITLE =

A( ;
A I 0.1;
= L 20.0;
BLD 103;
CALL FC 2 (
In := L 20.0);
A BR;
) ;
JNB _002;
L 2;
T MW 2;
_002: NOP 0;
END_ORGANIZATION_BLOCK
你测试一下这个程序，这就是BR的功能