SCL编程问答

Destiti

—

DsbaType;

=

1?|?

;

//kssign values for destirLfitioEL pointer

TescZ

.

r>e

etin_Leii^ht

: =

lejiCia;

Test^

.

I>e

^I>B_H'uiiLiier

: =

IfiSOT

j

T^s^t?. I>eEtiEi^Byt

-e_PoiEiter-;

=

dT^#16#e4DOOCOOF

/_/

直

ufriif STC20 1111(1 Fafajne

匕

rierijnm de r AKY

—

Poin.t ezr-Var iab len

//CaLliiig EFCZO and programsxng of AITY ipoirit&r varlablGS

er

J

：

=

3FC?C (sccblk

- =

pAn

匚

soxirue, dstlJ Ik

:

=

p

Aiiy_destin);

ZIW EUNCTIDEI

Fig.

01

Use the S7-SCL in

struction

AT to create a temp late via the structured variable

and declare the

Thus with

he in structi

on

you have defi ned an ANY poin

ter.

3

Now you must pr eset the ANY poin ter with the structured in structi ons as in Fig. 01. The

follow ing

nstructio ns corres pond to the structure of the ANY poi nter

Byte 10

ID

//Hex for the syn tax

//for the data type

Byte

//le ngth here 10

bytes

//for

DB6

//byte and bit address of the data

block

Parameterize the ANY parameters of the SFC20 (BLKMOV) with the defi ned ANY variables

'pAny _source

mple.

in)

The table below describes how to p roceed to defi ne an ANY poin ter in a

UDT.

No. P rocedure

1

To defi ne the ANY p arameters you first create a UDT, for exa mple a UDT1 with the symbolic n

ame

The variable

(RET_VAL).

'AnyPoint

arameters:

Syn taxID: BYTE;

tax ID

DataT ype: BYTE;

type

//sp ecification of the syn

//code for the data

DataCou nt: INT; //rep eat factor

DB_Number: WORD;

//n umber for data block

Byte Poin ter: DWORD;

//poin ter for byte and bit address

n the fun cti on you declare the variables, for exa mple

'buffer_desti n

AT to create the templates via the structured variables

declare the

'Desti n_Any

you have defi ned the ANY p oi nters as in Fig. 02.

TYPE

AnyP

oint

STRUCT

Syntax ID;

BYTE;

；

EYTE^

DmgCczunt;

IHT;

DB

—

Mujuljsr

:

TiJORL

;

SycaPo

irtCeif

：

DUO HE;

EMD_STRircT

EiWTYPE

F-UMCVION

FCl:

VOID

VUK

buf

f

er_5

3ource_Aiiy

BT

bu

?

?er_sflu.r c e

AJJT

i

but

AnyPoiiit;

DeEtin_Aiiy

AT

buf fer_destiii:

AHT;

erg:

IMT;

E2n> VAft

bTif

EyTit.a.3iir):

=

l^#iO

;

tnif iar_Eource. Dat-aTyi)e:

=

;

hixif fer_source

.

Dat-aCoxirit

:

=

16#0

a;

buffer

e,

DB

;

=

X6f 0^

;

buf fet

—sour u?

-Byte

Poin

匸

er

：

=

d-wil^#S4000000^

kxuf fRE

—

dQFtzLn >:

=

IS? 10

;

buf fer_(irpe:

-

ISSZ

;

bvtier_(lestln. DataCount:

=

16#0

A

;

bxi

?

ief_(le

ST-lii.

DB_tJujiil)er

:

—

IS i 0 7

；

b'ii?faif_dGstill. EytaPoiiit SI：

:

=

d-w#i63ftS4CiOOOOO;

e

rg:

=

SFC^O C^rcblk:

=

Sour

匚

, dstiblh

:

=

__Any)

;

EXD

FUNCTIOK

Fig.

02

Now you must pr eset the ANY poin ter with the structured in structi ons as in Fig. 02. The

follow ing

nstructio ns corres pond to the ANY poi nter

data block.

16#10;

16#02;

//hex for the syn tax

ID

//for data type

Byte

//le ngth here 10

bytes

//for

DB7

//byte and bit address of the data

block

dw#16#84000000;

4

Parameterize the ANY parameters of the SFC20 (BLKMOV) with the defi ned ANY variables

The variable

More in formatio n on the structure of the ANY poin ter is also available in the On li ne Help of STE P 7 in the cha

pter en titled

Format of the ANY p arameter type

Note

If you call a fun cti on with the STL p rogram in S7-SCL, which has an OUT p arameter of the ANY type, the n

parameterization with an ANY p oi nter, like

S7-SCL, because the ANY poin ters are p rocessed differe ntly in STL and S7-SCL. When assig ning from

ANY to ANY in S7-SCL, the 10 bytes are cop ied from on poi nter to the other (6 bytes) in order to forward the ANY

poin ters received to the INPUT p arameters. To p arameterize the ANY OUT p arameters of an

STL p rogram we recomme nd variables of the

type other tha n ANY is assig ned to an ANY variable, the n the S7-SCL comp iler creates the address (10 bytes) and

writes it to the ANY poin ter.

Copy the

V5.5 pr oject the n unp acks automatically with all the associated subdirectories. You can the n use the

SIMATIC Man ager to open and pr ocess the extracted pr oject. The STEP 7 p roject in cludes two stati ons.

Stati on_1 contains the pr ogram for defi ning the ANY poin ter in a fun cti on and Stati on_2 contains the

p rogram for defi ning the ANY poin ter in a UDT.

SCL_ ( 88 KB )

在没有明确声明

DB

的情况下，如何使用

打开一个数据块

？

< br>

描述

：

编程过程中，可以使用参数类型

BLOCK_DB

（

图

.01

）

.

在编译时，具体 的数据块是不确定的，所以

S7-SCL

编译器通过符号表和

DB

DB

,

S7-SCL

假定

该数据类型为

BOOL, BYTE, WORD

或

DWORD

。

下面的例子，通过绝对地址寻址

，

可以访问

DB

数据中的变量。在

FB

中，没有确定

DB

块（

db_test

）的数

据

D D0

此时被读。

run

KBL

VAR TPPUT

E3b_tcit:

_L.B;

stGt_VQrl:

T ZflL;

?HI> VU

nip mJMCTlUH BLOCK

图

.01

该

DB

的数据

DD0

为

< br>DINT

数据格式。

DD0

被转 化为

TIME

类型变量。

Stati on_1 contains the pr ogram for defi ning the ANY poin ter in a fun cti on and Stati on_2 contains the

注意

：

< /p>

语句

允许直接访问

DB

。必须定义