转帖 wincc的n个经典问题解答之一
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yuhoucaihong
2007-07-18
1、问: 如何触发计算机扬声器的声音?
答: 编写如下C-Action:
#pragma code("kernel32.dll");
BOOL Beep(DWORD dwFreq,DWORD dwDuration);
#pragma code();
Beep(500,500);
2、问: 如何通过C脚本来确定报警信息?
答: 首先必须在画面中插入报警控件,可以用如下两种方式来确认信息:
(1)、确认单条信息
4版本和高于此版本的WinCC
BOOL OnBtnSinglAckn(char*lpszPictureName,char*lpszObjectName)
5版本和高于此版本的WinCC
BOOL AXC_OnBtnSinglAckn(char*lpszPictureName,char*lpszObjectName)
(2)、确认报警窗口所有可见的报警
4版本和低于此版本的WinCC
BOOL OnBtnVisibleAckn(char*lpszPictureName,char*lpszObjectName)
5版本和高于此版本的WinCC
BOOL AXC_OnBtnVisibleAckn(char*lpszPictureName,char*lpszObjectName)
3、问: 如何在WinCC中读取系统时间?
答: 通过如下C-Action:
#pragma code("kernel32.dll");
Void GetLocalTimes(SYSTEMTIME*lpst);
#pragma code();
SYSTEMTIME time;
GetLocalTime(&time);
SetTagWord("Varname",time.wYear);
SetTagWord("Varname",time.wMonth);
SetTagWord("Varname",time.wDayOfWeek);
SetTagWord("Varname",time.wDay);
SetTagWord("Varname",time.wHour);
SetTagWord("Varname",time.wMinute);
SetTagWord("Varname",time.wSecond);
SetTagWord("Varname",time.wMilliseconds);
4、问: 如何经Windows对话框设置日期时间?
答: 通过调用Windows对话框实现。具体如下:
#include"apdefap.h"
void onClick(char*lpszPictureName,char*lpszObjectName,
char*lpszPropertyName)
{ProgramExcute("c:\\win98\\control.exe timedate.cpl");}
其中执行的程序路径,需根据具体情况填写。
5、问: 如何在WinCC中调用SQL语言?
答: 1、创建一个 SQL文件,此文件在ISQL中建立,文件内包含所要执行的SQL语句。Windows对话框实现。具体如下:
2、在WinCC中用C Script 调用上述SQL文件,如下所示:
#include"apdefap.h"
void OnLButtonDown(char* lpszPictureName,
char* lpszObjectName,
char* lpszPropertyName,
UINT nFlags,int x,int y)
{
char*a="c:\\siemens\\common\\SQLANY\\ISQL-q-b-c
UID=DBA;PWD=SQL;DBF=E:\\testsql\\testsqlRT.DB;
DBN=CC_testsql_99-12-03-12:48:26R;READ
E:testsql\\test.sql";
Printf("%s\r\n",a);
ProgramExcute(a);
}
下面是一个简单的SQL文件内容:
select *from pde#hd#t#test;
output to e:\\test2.txt FORMAT ascii
注意:文件名及路径中不要带空格。
6、问: 如何整点启动归档?
答: 在"Globle Script"下的Project function编写程序函数:cyclicarchive
BOOL cyclicarchive()
{
#pragma code("kernel.dll");
void GetLocalTime(SYSTEMTIME*lpsz);
#pragma code();
SYSTEMTIME time;
Int t1;
GetLocalTime(&time);
T1=time.wMinute;
If(t1==00)
{
SetTagBit("startarchive",1);
Return(BOOL) (GetTagBit("startarchive"));
}
}
在Tagloging中的"Properties of process tag"中的"archive tag"Tab下的Archive type选择Cycle-selective,在"Event"标签下的"StartEvent"内选择cyclicarchive函数。
7、问: How can I set and reset a WinCC variable by mouse click with C script?
答: The following function shows how you can alternately set and reset a WinCC variable by mouse click.
#include "apdefap.h"
void OnClick(char* lpszPictureName, char* lpszObjectName, char* lpszPropertyName)
{
BOOL z;
z=GetTagBit("MyBitVariable");
if (z==0)
SetTagBit("MyBitVariable",1);
else
SetTagBit("MyBitVariable",0);
}
8、问: How can I program a waiting function (Sleep) in WinCC?
答: The following sample program shows how the "Sleep" is used.
#pragma code("Kernel32.dll")
void Sleep(int milliseconds);
#pragma code()
Sleep(1000); //time specification in milliseconds
Warning:
If you use Sleep(), processing the C script is interrupted for the time indicated. Requests for the interrupted function cannot be processed during this time.
9、问: How can I output a SIMATIC timer minutes and seconds in WinCC?
答: If you want to output a SIMATIC Timer in minutes and seconds in WinCC, then in WinCC please use a static text in the Graphics Designer to which you interface the following action:
char* _main(char* lpszPictureName, char* lpszObjectName, char* lpszPropertyName)
{
char *p;
DWORD hilf;
int min, sec;
p=SysMalloc(10);
hilf=GetTagDWord("Time");
min=hilf/60000;
sec=hilf%60000/1000;
sprintf(p,"%d min %d sec",min,sec);
return p;
}
The "Time" variable linked to the I/O field must have the following properties:
•Data type "32-bit value without sign"
•Format adaptation "DwordToSimaticBCDTimer"
•Address: data area "Times" and addressing "Word"