siemens300/400编程技巧3则

S7 300400 的一些功能和技巧1

数据块拷贝

FUNCTION FC 100 : VOID

TITLE =

//DB BLOCK COPY

AUTHOR : AXG

NAME : DBBTODBB

VERSION : 0.1

VAR_INPUT

SOU_DB : INT ; //SOURCE DB NUMBER

LENG : INT ; //HOW MANY TO COPY

DES_DB : INT ; //DESTINATION DB NUMBER

END_VAR

VAR_TEMP

SOURCE : ANY ;

DEST : ANY ;

END_VAR

BEGIN

NETWORK

TITLE =

LAR1 P##SOURCE; // Load the start address of the ANY pointers in AR1.

L B#16#10; // Load the syntax ID and

T LB [AR1,P#0.0]; // transfer it to the ANY pointer.

L B#16#4; // Load data type WORD and

T LB [AR1,P#1.0]; // transfer it to the ANY pointer.

L #LENG; // Load HOW MANY WORDS and

T LW [AR1,P#2.0]; // transfer them to the ANY pointer

L #SOU_DB; // Source is DB[?], DBB0.0

T LW [AR1,P#4.0]; //

L P#DBX 0.0; //

T LD [AR1,P#6.0]; //

LAR1 P##DEST; //Load the DESTINATION address of the ANY pointer in AR1.

L B#16#10; //Load the syntax ID and

T LB [AR1,P#0.0]; //transfer it to the ANY pointer.

L B#16#4; //Load data type WORD and

T LB [AR1,P#1.0]; //transfer it to the ANY pointer.

L #LENG; //Load HOW MANY WORDS and

T LW [AR1,P#2.0]; //transfer them to the ANY pointer.

L #DES_DB; //Destination is DB{?}, DBB0.0

T LW [AR1,P#4.0];

L P#DBX 0.0; //

T LD [AR1,P#6.0]; //

CALL "BLKMOV" (//Call the block move system function

SRCBLK := #SOURCE,//

RET_VAL := MW 210,//Evaluate the BR bit and MW 210

DSTBLK := #DEST);//

END_FUNCTION

使用说明：可直接调用，#SOURCE---源数据块号

#DEST------目标数据块号

#LENG----要拷贝数据的长度

S7 300400 的一些功能和技巧2

单键翻转

FUNCTION FC 11 : VOID

TITLE =

//

AUTHOR : AXG

FAMILY : ESU

NAME : SDZF

VERSION : 0.0

BEGIN

NETWORK

TITLE =

A M 0.0;

A M 0.1;

= M 58.0;

NETWORK

TITLE =

A M 58.0;

AN M 58.1;

= M 58.2;

NETWORK

TITLE =

A M 58.2;

S M 58.1;

ON M 58.0;

ON M 0.0;

R M 58.1;

NOP 0;

NETWORK

TITLE =

A M 58.2;

A M 58.4;

= M 58.3;

NETWORK

TITLE =

A M 58.2;

AN M 58.3;

AN M 58.4;

S M 58.4;

O M 58.3;

ON M 0.0;

R M 58.4;

NOP 0;

END_FUNCTION

使用说明：M0.0----使能

M0.1----单键使M58.4翻转

S7 300400 的一些功能和技巧3

循环读模拟量入DB块

L #DB_NO

T LW 0

OPN DB [LW 0]

L #PIW_ADDR

SLD 3

T LD 4

L #DBD_ADDR

SLD 3

T LD 8

L #CH_LEN

NEXT: T LW 0

L LD 4

LAR1

L PIW [AR1,P#0.0]

T LW 2

{ CALL "Read Analog Value 464-2"

IN :=LW2

HI_LIM :=5.000000e 002

LO_LIM :=-1.000000e 001 将模拟量转换成工程量

BIPOLAR:=TRUE

RET_VAL:=LW10

OUT :=LD12 }

L LD 8

LAR1

L LD 2

T DBD [AR1,P#0.0]

L LD 4

L#16

T LD 4

L LD 8

L#32

T LD 8

L LW 0

LOOP NEXT

PIW_Addr ：模拟块通道起始地址

CHI_LEN ：要读入的 通道数

DB_NO ：存储数据块

DBW_Addr ：存储在数据块中的字地址