参考文献：http://www.docin.com/p-275216804.html
（基于Citect远程控制的变流量堆料控制系统 王玉增,顾英妮,王维 济南大学,机械工程学院 ，Citect,CTAPI）
Citect组态软件已被施耐德收购。通过软件提供的API，可以通过高级语言编程和组态软件内部数据点通讯。
下面是一个Python的例子，暂未测试：
https://github.com/mitchyg/Random/blob/master/pyctapi/src/pyctapi.py
#! /usr/bin/python
#
# File: pyctapi.py
# Author: Mitchell Gayner
# Date: 06/08/2009
#
# Desc:
# Wrapper for Citect CTAPI dll
# Compatible with Citect V6.1 DLLs
#
# You must have the following DLLs:
# - CiDebugHelp.dll
# - Ct_ipc.dll
# - CtApi.dll
# - CtEng32.dll
# - CtRes32.DLL
# - CtUtil32.dll
#
import platform
from ctypes import *
import sys
if platform.system() != "Windows":
raise OSError
class pyCtApi:
def __init__(self, dllPath_ = "C:/citect/bin/"):
#Load required DLLs
CDLL(dllPath_ + ‘/CiDebugHelp‘)
CDLL(dllPath_ + ‘/CtUtil32‘)
CDLL(dllPath_ + ‘/Ct_ipc‘)
self.__libc = CDLL(dllPath_ + ‘/CtApi‘)
self.__cn = None # Create connection object
def Open(self, address_, username_, password_, mode_ = 0):
"Open connection to running citect process"
if self.__cn != None:
print "Already connected"
return
self.__cn = windll.CtApi.ctOpen(address_, username_, password_, 2)
def Close(self):
"Close connection to running citect process"
ct = windll.CtApi.ctClose(self.__cn)
self.__cn = None
def Connected(self):
if self.__ExecCicode("Version(0)") != "":
return True
return False
def TagReadInt(self, tagName_):
"Read tag from Citect and covert to int"
str = self.__TagRead(tagName_)
#try:
return int(str)
#except:
return -1
def TagReadFloat(self, tagName_):
"Read tag from Citect and covert to float"
str = self.__TagRead(tagName_)
#try:
return float(str)
#except:
return -1
def TagReadStr(self, tagName_):
"Read tag from Citect and covert to string"
str = self.__TagRead(tagName_)
return str
def TagWrite(self, tagName_, value_):
"Write value to Citect tag"
ok = self.__TagWrite(tagName_, str(value_))
return ok
def ExecuteCicode(self, function_):
return self.__ExecCicode(function_)
def __TagRead(self, tagName_):
"PRIVATE: Read tag from Citect tag"
f = create_string_buffer(‘\000‘ * 32)
ok = windll.CtApi.ctTagRead(self.__cn, tagName_, byref(f), sizeof(f))
return f.value
def __TagWrite(self, tagName_, value_):
"PRIVATE: Write value to Citect tag"
ok = windll.CtApi.ctTagWrite(self.__cn, tagName_, value_)
return ok
def __ExecCicode(self, function_, hWin_=0, nMode_=0):
f = create_string_buffer(‘\000‘ * 32)
ok = windll.CtApi.ctCicode(self.__cn, function_, hWin_, nMode_, byref(f), sizeof(f), None)
return f.value
# TODO LIST:
‘‘‘DONE extern HANDLE CTAPICALL ctOpen(LPCSTR,LPCSTR,LPCSTR,DWORD); /* Open CTAPI interface */‘‘‘
# extern BOOL CTAPICALL ctOpenEx(LPCSTR,LPCSTR,LPCSTR,DWORD,HANDLE);
# extern HANDLE CTAPICALL ctClientCreate();
# extern BOOL CTAPICALL ctClientDestroy(HANDLE);
‘‘‘DONE extern BOOL CTAPICALL ctClose(HANDLE); /* Close CTAPI interface */‘‘‘
# extern BOOL CTAPICALL ctCloseEx(HANDLE, BOOL);
# extern BOOL CTAPICALL ctCancelIO(HANDLE,CTOVERLAPPED*); /* cancel pending I/O */
‘‘‘DONE extern DWORD CTAPICALL ctCicode(HANDLE,LPCSTR,DWORD,DWORD,LPSTR,DWORD,CTOVERLAPPED*); /* execute cicode */‘‘‘
# extern BOOL CTAPICALL ctPointWrite(HANDLE,HANDLE,void*,DWORD,CTOVERLAPPED*); /* write to point handle */
# extern BOOL CTAPICALL ctPointRead(HANDLE,HANDLE,void*,DWORD,CTOVERLAPPED*); /* read from point handle */
# extern HANDLE CTAPICALL ctTagToPoint(HANDLE,LPCSTR,DWORD,CTOVERLAPPED*); /* convert tag into point handle*/
# extern BOOL CTAPICALL ctPointClose(HANDLE,HANDLE); /* free a point handle */
# extern HANDLE CTAPICALL ctPointCopy(HANDLE); /* copy a point handle */
# extern BOOL CTAPICALL ctPointGetProperty(HANDLE,LPCTSTR,void*,DWORD,DWORD*,DWORD); /* get point property */
# extern DWORD CTAPICALL ctPointDataSize(HANDLE); /* size of point data buffer */
# extern DWORD CTAPICALL ctPointBitShift(HANDLE); /* calculate bit shift offset */
# extern BOOL CTAPICALL ctPointToStr(HANDLE,BYTE*,DWORD,BYTE*,DWORD,DWORD); /* format point data to string */
# extern BOOL CTAPICALL ctStrToPoint(HANDLE,LPCSTR,DWORD,BYTE*,DWORD,DWORD); /* format string data into point*/
‘‘‘DONE extern BOOL CTAPICALL ctTagWrite(HANDLE,LPCSTR,LPCSTR); /* write to tag */‘‘‘
‘‘‘DONE extern BOOL CTAPICALL ctTagRead(HANDLE,LPCSTR,LPSTR,DWORD); /* read from tag */‘‘‘
# extern BOOL CTAPICALL ctEngToRaw(double*,double,CTSCALE*,DWORD); /* scale from eng to raw */
# extern BOOL CTAPICALL ctRawToEng(double*,double,CTSCALE*,DWORD); /* scale from raw to eng */
# extern BOOL CTAPICALL ctGetOverlappedResult(HANDLE,CTOVERLAPPED*,DWORD*,BOOL); /* get overlapped result */
# extern BOOL CTAPICALL ctEngToRaw(double*,double,CTSCALE*,DWORD); /* scale from eng to raw */
# extern BOOL CTAPICALL ctRawToEng(double*,double,CTSCALE*,DWORD); /* scale from raw to eng */
# extern HANDLE CTAPICALL ctFindFirst(HANDLE,LPCTSTR,LPCTSTR,HANDLE*,DWORD); /* initiate a search */
# extern BOOL CTAPICALL ctFindNext(HANDLE,HANDLE*); /* get the next search item */
# extern BOOL CTAPICALL ctFindPrev(HANDLE,HANDLE*); /* get the prev search item */
# extern DWORD CTAPICALL ctFindScroll(HANDLE,DWORD,LONG,HANDLE*); /* scroll to search item */
# extern BOOL CTAPICALL ctFindClose(HANDLE); /* close a search */
# extern LONG CTAPICALL ctFindNumRecords(HANDLE); /* get the total number of records in the search */
# extern BOOL CTAPICALL ctGetProperty(HANDLE,LPCTSTR,void*,DWORD,DWORD*,DWORD); /* get a named property */
# extern HANDLE CTAPICALL ctListNew(HANDLE,DWORD); /* create poll list */
# extern BOOL CTAPICALL ctListFree(HANDLE); /* free poll list */
# extern HANDLE CTAPICALL ctListAdd(HANDLE,LPCSTR); /* add tag to poll list */
# extern BOOL CTAPICALL ctListDelete(HANDLE); /* delete tag from poll list */
# extern BOOL CTAPICALL ctListRead(HANDLE,CTOVERLAPPED*); /* read poll list */
# extern BOOL CTAPICALL ctListWrite(HANDLE,LPCSTR,CTOVERLAPPED*); /* write poll list item */
# extern BOOL CTAPICALL ctListData(HANDLE,void*,DWORD,DWORD); /* get list data */
# extern HANDLE CTAPICALL ctListEvent(HANDLE,DWORD); /* get list event */
# extern BOOL CTAPICALL ctGetNumberOfLicenses(HANDLE, SHORT*, BYTE); /* Key Check CTAPI interface */
Python代码
通过CTAPI和Citect SCADA软件进行数据通讯
时间： 2024-10-13 06:45:07