創(chuàng)建新連接外部變量只能在與自動化系統(tǒng)連接的基礎(chǔ)上創(chuàng)建。如果還沒有需要的連接，必須首先創(chuàng)建該連接。先決條件必須安裝所需要的通訊處理器和相關(guān)的硬件驅(qū)動程序。還必須安裝期望的通訊驅(qū)動程序，例如“SIMATICS7ProtocolSuite”步驟
步驟
1擴展“變量管理”中通訊驅(qū)動程序的視圖。
2選擇期望的通道單元，例如“PROFIBUS”。
3在用于通道單元的彈出式菜單中，選擇“新建驅(qū)動程序連接...”。
4在“常規(guī)”標(biāo)簽卡的“名稱”域中，輸入在項目范圍內(nèi)唯一的用于連接的名稱。
5單擊“屬性”按鈕，打開“連接參數(shù)”對話框。設(shè)置該連接所需的參數(shù)。有關(guān)詳細(xì)信息，請參考各相應(yīng)通道的幫助文檔。
6通過單擊“確定”，關(guān)閉所有的對話框。
組態(tài)外部變量創(chuàng)建變量的過程對于所有數(shù)據(jù)類型基本相似。然而，對某些數(shù)據(jù)類型進行特殊設(shè)置。(步驟5-7)。先決條件必須安裝所需要的通訊處理器和硬件驅(qū)動程序。還必須安裝期望的通訊驅(qū)動程序，例如“SIMATICS7ProtocolSuite”。為了使用通道單元，必須建立連接(例如“PROFIBUS”)。步驟
步驟
1從所期望的連接的彈出式菜單中選擇“新建變量”。“變量屬性”對話框?qū)⒋蜷_。
2在“常規(guī)”標(biāo)簽卡上，“名稱”域中，輸入在WinCC項目范圍內(nèi)唯一的變量名，例如“WinCCTag_01”。
3設(shè)置變量的“數(shù)據(jù)類型”，例如“浮點數(shù)64位IEEE754”，在相關(guān)域中。
4單擊“選擇”打開“變量屬性”對話框，在AS中設(shè)置變量的地址區(qū)域。
在二進制或8位變量的情況下，如果通道不支持按位/字節(jié)訪問，在“變量屬性”對話框前會顯示“位/字節(jié)變量”對話框。
要獲得更多信息，請參考“BinWrite機制”。單擊“確定”按鈕，關(guān)閉“位/字節(jié)變量”或“變量屬性”對話框。
5在數(shù)字變量的情況下，WinCC會在“類型轉(zhuǎn)換”域中顯示建議的類型轉(zhuǎn)換。
按照不同需要，選擇合適的的類型轉(zhuǎn)換。轉(zhuǎn)換以“X到Y(jié)”的次序顯示，(www.dqjsw.com.cn)X是WinCC格式、Y是AS格式，例如“DoubleToDouble”。
6單擊“線性標(biāo)定”復(fù)選框使數(shù)字標(biāo)簽線性標(biāo)定。輸入“過程值范圍”(在AS中)以及“變量數(shù)值范圍”(在WinCC中)的上限和下限。
7當(dāng)使用文本變量工作，將激活“長度”域。在這種情況下，以字符形式輸入文本變量的長度。
8單擊“確定”關(guān)閉所有對話框。
WinCC數(shù)據(jù)類型排序的類型轉(zhuǎn)換當(dāng)組態(tài)外部變量，必須對所有數(shù)字型數(shù)據(jù)類型執(zhí)行類型轉(zhuǎn)換。WinCC這方面的數(shù)據(jù)格式?jīng)Q定了數(shù)據(jù)類型。類型轉(zhuǎn)換定義如何從WinCC格式轉(zhuǎn)換到AS格式。該定義適用于雙向傳送。從列表中選擇期望的WinCC數(shù)據(jù)類型。下表列出所支持的類型轉(zhuǎn)換和數(shù)值范圍。WinCC數(shù)據(jù)類型窗體頂部類型轉(zhuǎn)換“無符號8位數(shù)”數(shù)值范圍
ByteToUnsignedByte0...255(無轉(zhuǎn)換)
ByteToUnsignedWord0...255
ByteToUnsignedDword0...255
ByteToSignedByte0...127
ByteToSignedWord0...255
ByteToSignedDword0...255
ByteToBCDByte0...99
ByteToBCDWord0...255
ByteToBCDDword0...255
ByteToAikenByte0...99
ByteToAikenWord0...255
ByteToAikenDword0...255
ByteToExcessByte0...99
ByteToExcessWord0...255
ByteToExcessDword0...255
“有符號8位數(shù)”類型轉(zhuǎn)換數(shù)值范圍
CharToUnsignedByte0...127
CharToUnsignedWord0...127
CharToUnsignedDword0...127
CharToSignedByte-128...+127(無轉(zhuǎn)換)
CharToSignedWord-128...+127
CharToSignedDword-128...+127
CharToMSBByte-128...+127
CharToMSBWord-128...+127
CharToMSBDword-128...+127
CharToBCDByte0...99
CharToBCDWord0...127
CharToBCDDword0...127
CharToSignedBCDByte-9...+9
CharToSignedBCDWord-128...+127
CharToSignedBCDDword-128...+127
CharToExtSignedBCDByte-79...+79
CharToExtSignedBCDWord-128...+127
CharToExtSignedBCDDword-128...+127
CharToAikenByte0...99
CharToAikenWord0...127
CharToAikenDword0...127
CharToSignedAikenByte-9...+9
CharToSignedAikenWord-128...+127
CharToSignedAikenDword-128...+127
CharToExcessByte0...99
CharToExcessWord0...127
CharToExcessDword0...127
CharToSignedExcessByte-9...+9
CharToSignedExcessWord-128...+127
CharToSignedExcessDword-128...+127
“浮點數(shù)64位IEEE754”類型轉(zhuǎn)換數(shù)值范圍
DoubleToDouble+-1.79769313486231e+308(無轉(zhuǎn)換)
DoubleToUnsignedByte0...255
DoubleToUnsignedWord0...65535
DoubleToUnsignedDword0...4294967295
DoubleToSignedByte-128...+127
DoubleToSignedWord-32768...+32767
DoubleToSignedDword-2147483647...+2147483647
DoubleToFloat+-3.402823e+38
DoubleToMSBByte-127...+127
DoubleToMSBWord-32767...+32767
DoubleToMSBDword-2147483647...+2147483647
DoubleToBCDByte0...99
DoubleToBCDWord0...9999
DoubleToBCDDword0...99999999
DoubleToSignedBCDByte-9...+9
DoubleToSignedBCDWord-999...+999
DoubleToSignedBCDDword-9999999...+9999999
DoubleToExtSignedBCDByte-79...+79
DoubleToExtSignedBCDWord-7999...+7999
DoubleToExtSignedBCDDword-79999999...+79999999
DoubleToAikenByte0...99
DoubleToAikenWord0...9999
DoubleToAikenDword0...99999999
DoubleToSignedAikenByte-9...+9
DoubleToSignedAikenWord-999...+999
DoubleToSignedAikenDword-9999999...+9999999
DoubleToExcessByte0...99
DoubleToExcessWord0...9999
DoubleToExcessDword0...99999999
DoubleToSignedExcessByte-9...+9
DoubleToSignedExcessWord-999...+999
DoubleToSignedExcessDword-9999999...+9999999
DoubleToS5Timer10...9990000
DoubleToS5Float+-1.701411e+38
“無符號32位數(shù)”類型轉(zhuǎn)換數(shù)值范圍
DwordToUnsignedDword0...4294967295(無轉(zhuǎn)換)
DwordToUnsignedByte0...255
DwordToUnsignedWord0...65535
DwordToSignedByte0...127
DwordToSignedWord0...32767
DwordToSignedDword0...2147483647
DwordToBCDByte0...99
DwordToBCDWord0...9999
DwordToBCDDword0...99999999
DwordToAikenByte0...99
DwordToAikenWord0...9999
DwordToAikenDword0...99999999
DwordToExcessByte0...99
DwordToExcessWord0...9999
DwordToExcessDword0...99999999
DwordToSimaticTimer10...9990000
DwordToSimaticBCDTimer10...9990000
“浮點數(shù)32位IEEE754”類型轉(zhuǎn)換數(shù)值范圍
FloatToFloat+-3.402823e+38(無轉(zhuǎn)換)
FloatToUnsignedByte0...255
FloatToUnsignedWord0...65535
FloatToUnsignedDword0...4.294967e+09
FloatToSignedByte-128...+127
FloatToSignedWord-32768...+32767
FloatToSignedDword-2.147483e+09...+2.147483e+09
FloatToDouble+-3.402823e+38
FloatToMSBByte-127...+127
FloatToMSBWord-32767...+32767
FloatToMSBDword-2.147483e+09...+2.147483e+09
FloatToBCDByte0...99
FloatToBCDWord0...9999
FloatToBCDDword0...9.999999e+07
FloatToSignedBCDByte-9...+9
FloatToSignedBCDWord-999...+999
FloatToSignedBCDDword-9999999...+9999999
FloatToExtSignedBCDByte-79...+79
FloatToExtSignedBCDWord-7999...+7999
FloatToExtSignedBCDDword-7.999999e+07...+7.999999e+07
FloatToAikenByte0...99
FloatToAikenWord0...9999
FloatToAikenDword0...9.999999e+07
FloatToSignedAikenByte-9...+9
FloatToSignedAikenWord-999...+999
FloatToSignedAikenDword-9999999...+9999999
FloatToExcessByte0...99
FloatToExcessWord0...9999
FloatToExcessDword0...9.999999e+07
FloatToSignedExcessByte-9...+9
FloatToSignedExcessWord-999...+999
FloatToSignedExcessDword-9999999...+9999999
FloatToS5Timer10...9990000
FloatToS5Float+-1.701411e+38
“有符號32位數(shù)”類型轉(zhuǎn)換數(shù)值范圍
LongToSignedDword-2147483647...+2147483647(無轉(zhuǎn)換)
LongToUnsignedByte0...255
LongToUnsignedWord0...65535
LongToUnsignedDword0...2147483647
LongToSignedByte-128...+127
LongToSignedWord-32768...+32767
LongToMSBByte-127...+127#p#分頁標(biāo)題#e#
LongToMSBWord-32767...+32767
LongToMSBDword-2147483647...+2147483647
LongToBCDByte0...99
LongToBCDWord0...9999
LongToBCDDword0...99999999
LongToSignedBCDByte-9...+9
LongToSignedBCDWord-999...+999
LongToSignedBCDDword-9999999...+9999999
LongToExtSignedBCDByte-79..+79
LongToExtSignedBCDWord-7999...+7999
LongToExtSignedBCDDword-79999999...+79999999
LongToAikenByte0...99
LongToAikenWord0...9999
LongToAikenDword0...99999999
LongToSignedAikenByte-9...+9
LongToSignedAikenWord-999...+999
LongToSignedAikenDword-9999999...+9999999
LongToExcessByte0...99
LongToExcessWord0...9999
LongToExcessDword0...99999999
LongToSignedExcessByte-9...+9
LongToSignedExcessWord-999...+999
LongToSignedExcessDword-9999999...+9999999
LongToSimaticTimer10...9990000
LongToSimaticBCDTimer10...9990000
“有符號16位數(shù)”類型轉(zhuǎn)換數(shù)值范圍
ShortToUnsignedByte0...255
ShortToUnsignedWord0...32767
ShortToUnsignedDword0...32767
ShortToSignedByte-128...+127
ShortToSignedWord-32768...+32767(無轉(zhuǎn)換)
ShortToSignedDword-32768...+32767
ShortToMSBByte-127...+127
ShortToMSBWord-32767...+32767
ShortToMSBDword-32768...+32767
ShortToBCDByte0...99
ShortToBCDWord0...9999
ShortToBCDDword0...32767
ShortToSignedBCDByte-9...+9
ShortToSignedBCDWord-999...+999
ShortToSignedBCDDword-32768...+32767
ShortToExtSignedBCDByte-79...+79
ShortToExtSignedBCDWord-7999...+7999
ShortToExtSignedBCDDword-32768...+32767
ShortToAikenByte0...99
ShortToAikenWord0...9999
ShortToAikenDword0...32767
ShortToSignedAikenByte-9...+9
ShortToSignedAikenWord-999...+999
ShortToSignedAikenDword-32768...+32767
ShortToExcessByte0...99
ShortToExcessWord0...9999
ShortToExcessDword0...32767
ShortToSignedExcessByte-9...+9
ShortToSignedExcessWord-999...+999
ShortToSignedExcessDword-32768...+32767
“無符號16位數(shù)”類型轉(zhuǎn)換數(shù)值范圍
WordToUnsignedWord0...65535(無轉(zhuǎn)換)
WordToUnsignedByte0...255
WordToUnsignedDword0...65535
WordToSignedByte0...127
WordToSignedWord0...32767
WordToSignedDword0...65535
WordToBCDByte0...99
WordToBCDWord0...9999
WordToBCDDword0...65535
WordToAikenByte0...99
WordToAikenWord0...9999
WordToAikenDword0...65535
WordToExcessByte0...99
WordToExcessWord0...9999
WordToExcessDword0...65535
WordToSimaticCounter0...999
WordToSimaticBCDCounter0...999
按AS數(shù)據(jù)類型排序的類型轉(zhuǎn)換引言在組態(tài)外部變量時，必須對所有數(shù)字型數(shù)據(jù)類型執(zhí)行類型轉(zhuǎn)換。WinCC這方面的數(shù)據(jù)格式?jīng)Q定了數(shù)據(jù)類型。類型轉(zhuǎn)換定義如何從WinCC格式轉(zhuǎn)換到AS格式。該定義適用于雙向傳送。從列表中選擇期望的AS數(shù)據(jù)類型。下表列出所支持的類型轉(zhuǎn)換和數(shù)值范圍。AS數(shù)據(jù)類型窗體頂部所有AikenByteAikenDwordAikenWordBCDByteBCDDwordBCDWordDoubleExcessByteExcessDwordExcessWordExtSignedBCDByteExtSignedBCDDwordExtSignedBCDWordFloatMSBByteMSBDwordMSBWordS5FloatS5TimerSignedAikenByteSignedAikenDwordSignedAikenWordSignedBCDByteSignedBCDDwordSignedBCDWordSignedByteSignedDwordSignedExcessByteSignedExcessDwordSignedExcessWordSignedWordSimaticBCDCounterSimaticBCDTimerSimaticCounterSimaticTimerUnsignedByteUnsignedDwordUnsignedWord窗體底部數(shù)據(jù)類型和數(shù)值范圍“無符號字節(jié)”類型轉(zhuǎn)換數(shù)值范圍
ByteToUnsignedByte0...255(無轉(zhuǎn)換)
CharToUnsignedByte0...127
DoubleToUnsignedByte0...255
DwordToUnsignedByte0...255
FloatToUnsignedByte0...255
LongToUnsignedByte0...255
ShortToUnsignedByte0...255
WordToUnsignedByte0...255
“無符號字”類型轉(zhuǎn)換數(shù)值范圍
ByteToUnsignedWord0...255
CharToUnsignedWord0...127
DoubleToUnsignedWord0...65535
DwordToUnsignedWord0...65535
FloatToUnsignedWord0...65535
LongToUnsignedWord0...65535
ShortToUnsignedWord0...32767
WordToUnsignedWord0...65535(無轉(zhuǎn)換)
“無符號雙字”類型轉(zhuǎn)換數(shù)值范圍
ByteToUnsignedDword0...255
CharToUnsignedDword0...127
DoubleToUnsignedDword0...4294967295
DwordToUnsignedDword0...4294967295(無轉(zhuǎn)換)
FloatToUnsignedDword0...4.294967e+09
LongToUnsignedDword0...2147483647
ShortToUnsignedDword0...32767
WordToUnsignedDword0...65535
“有符號字節(jié)”類型轉(zhuǎn)換數(shù)值范圍
ByteToSignedByte0...127
CharToSignedByte-128...+127(無轉(zhuǎn)換)
DoubleToSignedByte-128...+127
DwordToSignedByte0...127
FloatToSignedByte-128...+127
LongToSignedByte-128...+127
ShortToSignedByte-128...+127
WordToSignedByte0...127
“有符號字”類型轉(zhuǎn)換數(shù)值范圍
ByteToSignedWord0...255
CharToSignedWord-128...+127
DoubleToSignedWord-32768...+32767
DwordToSignedWord0...32767
FloatToSignedWord-32768...+32767
LongToSignedWord-32768...+32767
ShortToSignedWord-32768...+32767(無轉(zhuǎn)換)
WordToSignedWord0...32767
“有符號雙字”類型轉(zhuǎn)換數(shù)值范圍
ByteToSignedDword0...255
CharToSignedDword-128...+127
DoubleToSignedDword-2147483647...+2147483647
DwordToSignedDword0...2147483647
FloatToSignedDword-2.147483e+09...+2.147483e+09
LongToSignedDword-2147483647...+2147483647(無轉(zhuǎn)換)
ShortToSignedDword-32768...+32767
WordToSignedDword0...65535
“MSBByte”類型轉(zhuǎn)換數(shù)值范圍
CharToMSBByte-128...+127
DoubleToMSBByte-127...+127
FloatToMSBByte-127...+127
LongToMSBByte-127...+127
ShortToMSBByte-127...+127
“MSBWord”類型轉(zhuǎn)換數(shù)值范圍
CharToMSBWord-128...+127
DoubleToMSBWord-32767...+32767
FloatToMSBWord-32767...+32767
LongToMSBWord-32767...+32767
ShortToMSBWord-32767...+32767
“MSBDWord”類型轉(zhuǎn)換數(shù)值范圍
CharToMSBDword-128...+127
DoubleToMSBDword-2147483647...+2147483647
FloatToMSBDword-2.147483e+09...+2.147483e+09
LongToMSBDword-2147483647...+2147483647
ShortToMSBDword-32768...+32767
“BCDByte”類型轉(zhuǎn)換數(shù)值范圍
ByteToBCDByte0...99
CharToBCDByte0...99
DoubleToBCDByte0...99
DwordToBCDByte0...99
FloatToBCDByte0...99
LongToBCDByte0...99
ShortToBCDByte0...99
WordToBCDByte0...99
“BCDWord”類型轉(zhuǎn)換數(shù)值范圍
ByteToBCDWord0...255
CharToBCDWord0...127
DoubleToBCDWord0...9999
DwordToBCDWord0...9999
FloatToBCDWord0...9999
LongToBCDWord0...9999
ShortToBCDWord0...9999
WordToBCDWord0...9999
“BCDDWord”類型轉(zhuǎn)換數(shù)值范圍
ByteToBCDDword0...255
CharToBCDDword0...127
DoubleToBCDDword0...99999999
DwordToBCDDword0...99999999
FloatToBCDDword0...9.999999e+07
LongToBCDDword0...99999999
ShortToBCDDword0...32767
WordToBCDDword0...65535
“SignedBCDByte”類型轉(zhuǎn)換數(shù)值范圍
CharToSignedBCDByte-9...+9
DoubleToSignedBCDByte-9...+9
FloatToSignedBCDByte-9...+9
LongToSignedBCDByte-9...+9
ShortToSignedBCDByte-9...+9
“SignedBCDWord”類型轉(zhuǎn)換數(shù)值范圍
CharToSignedBCDWord-128...+127
DoubleToSignedBCDWord-999...+999
FloatToSignedBCDWord-999...+999
LongToSignedBCDWord-999...+999
ShortToSignedBCDWord-999...+999
“SignedBCDDWord”類型轉(zhuǎn)換數(shù)值范圍
CharToSignedBCDDword-128...+127
DoubleToSignedBCDDword-9999999...+9999999
FloatToSignedBCDDword-9999999...+9999999
LongToSignedBCDDword-9999999...+9999999
ShortToSignedBCDDword-32768...+32767#p#分頁標(biāo)題#e#
“ExtSignedBCDByte”類型轉(zhuǎn)換數(shù)值范圍
CharToExtSignedBCDByte-79...+79
DoubleToExtSignedBCDByte-79...+79
FloatToExtSignedBCDByte-79...+79
LongToExtSignedBCDByte-79..+79
ShortToExtSignedBCDByte-79...+79
“ExtSignedBCDWord”類型轉(zhuǎn)換數(shù)值范圍
CharToExtSignedBCDWord-128...+127
DoubleToExtSignedBCDWord-7999...+7999
FloatToExtSignedBCDWord-7999...+7999
LongToExtSignedBCDWord-7999...+7999
ShortToExtSignedBCDWord-7999...+7999
“ExtSignedBCDDWord”類型轉(zhuǎn)換數(shù)值范圍
CharToExtSignedBCDDword-128...+127
DoubleToExtSignedBCDDword-79999999...+79999999
FloatToExtSignedBCDDword-7.999999e+07...+7.999999e+07
LongToExtSignedBCDDword-79999999...+79999999
ShortToExtSignedBCDDword-32768...+32767
“AikenByte”類型轉(zhuǎn)換數(shù)值范圍
ByteToAikenByte0...99
CharToAikenByte0...99
DoubleToAikenByte0...99
DwordToAikenByte0...99
FloatToAikenByte0...99
LongToAikenByte0...99
ShortToAikenByte0...99
WordToAikenByte0...99
AikenWord"數(shù)值范圍
ByteToAikenWord0...255
CharToAikenWord0...127
DoubleToAikenWord0...9999
DwordToAikenWord0...9999
FloatToAikenWord0...9999
LongToAikenWord0...9999
ShortToAikenWord0...9999
WordToAikenWord0...9999
“AikenDWord”類型轉(zhuǎn)換數(shù)值范圍
ByteToAikenDword0...255
CharToAikenDword0...127
DoubleToAikenDword0...99999999
DwordToAikenDword0...99999999
FloatToAikenDword0...9.999999e+07
LongToAikenDword0...99999999
ShortToAikenDword0...32767
WordToAikenDword0...65535
“SignedAikenByte”類型轉(zhuǎn)換數(shù)值范圍
CharToSignedAikenByte-9...+9
DoubleToSignedAikenByte-9...+9
FloatToSignedAikenByte-9...+9
LongToSignedAikenByte-9...+9
ShortToSignedAikenByte-9...+9
“SignedAikenWord”類型轉(zhuǎn)換數(shù)值范圍
CharToSignedAikenWord-128...+127
DoubleToSignedAikenWord-999...+999
FloatToSignedAikenWord-999...+999
LongToSignedAikenWord-999...+999
ShortToSignedAikenWord-999...+999
“SignedAikenDWord”類型轉(zhuǎn)換數(shù)值范圍
CharToSignedAikenDword-128...+127
DoubleToSignedAikenDword-9999999...+9999999
FloatToSignedAikenDword-9999999...+9999999
LongToSignedAikenDword-9999999...+9999999
ShortToSignedAikenDword-32768...+32767
“ExcessByte”類型轉(zhuǎn)換數(shù)值范圍
ByteToExcessByte0...99
CharToExcessByte0...99
DoubleToExcessByte0...99
DwordToExcessByte0...99
FloatToExcessByte0...99
LongToExcessByte0...99
ShortToExcessByte0...99
WordToExcessByte0...99
“ExcessWord”類型轉(zhuǎn)換數(shù)值范圍
ByteToExcessWord0...255
CharToExcessWord0...127
DoubleToExcessWord0...9999
DwordToExcessWord0...9999
FloatToExcessWord0...9999
LongToExcessWord0...9999
ShortToExcessWord0...9999
WordToExcessWord0...9999
“ExcessDWord”類型轉(zhuǎn)換數(shù)值范圍
ByteToExcessDword0...255
CharToExcessDword0...127
DoubleToExcessDword0...99999999
DwordToExcessDword0...99999999
FloatToExcessDword0...9.999999e+07
LongToExcessDword0...99999999
ShortToExcessDword0...32767
WordToExcessDword0...65535
“SignedExcessByte”類型轉(zhuǎn)換數(shù)值范圍
CharToSignedExcessByte-9...+9
DoubleToSignedExcessByte-9...+9
FloatToSignedExcessByte-9...+9
LongToSignedExcessByte-9...+9
ShortToSignedExcessByte-9...+9
“SignedExcessWord”類型轉(zhuǎn)換數(shù)值范圍
CharToSignedExcessWord-128...+127
DoubleToSignedExcessWord-999...+999
FloatToSignedExcessWord-999...+999
LongToSignedExcessWord-999...+999
ShortToSignedExcessWord-999...+999
“SignedExcessDWord”類型轉(zhuǎn)換數(shù)值范圍
CharToSignedExcessDword-128...+127
DoubleToSignedExcessDword-9999999...+9999999
FloatToSignedExcessDword-9999999...+9999999
LongToSignedExcessDword-9999999...+9999999
ShortToSignedExcessDword-32768...+32767
“SimaticCounter”類型轉(zhuǎn)換數(shù)值范圍
WordToSimaticCounter0...999
“SimaticBCDCounter”類型轉(zhuǎn)換數(shù)值范圍
WordToSimaticBCDCounter0...999
“SimaticTimer”類型轉(zhuǎn)換數(shù)值范圍
DwordToSimaticTimer10...9990000
LongToSimaticTimer10...9990000
“S5Float”類型轉(zhuǎn)換數(shù)值范圍
DoubleToS5Float+-1.701411e+38
FloatToS5Float+-1.701411e+38
“S5Timer”類型轉(zhuǎn)換數(shù)值范圍
DoubleToS5Timer10...9990000
FloatToS5Timer10...9990000
“SimaticBCDTimer”類型轉(zhuǎn)換數(shù)值范圍
DwordToSimaticBCDTimer10...9990000
LongToSimaticBCDTimer10...9990000
“Double”類型轉(zhuǎn)換數(shù)值范圍
DoubleToDouble+-1.79769313486231e+308(無轉(zhuǎn)換)
FloatToDouble+-3.402823e+38
“Float”類型轉(zhuǎn)換數(shù)值范圍
DoubleToFloat+-3.402823e+38
FloatToFloat+-3.402823e+38(無轉(zhuǎn)換)
BinWrite機制引言在WinCC中，一些通訊驅(qū)動程序及其通道單元不支持直接按位或字節(jié)訪問(位/字節(jié)訪問)已連接的自動化系統(tǒng)中的地址區(qū)域。于是，他們使用BinWrite機制。位/字節(jié)訪問用位/字節(jié)訪問通訊驅(qū)動程序的通道單元可直接讀寫期望的位或字節(jié)。在以下說明中，位x的數(shù)值通過直接位/字節(jié)訪問設(shè)置為1。BinWrite機制下列通訊驅(qū)動程序不支持位/字節(jié)訪問，使用BinWrite機制代替通道單元：ModbusSerialSIMATICS5ETHERNETLAYER4SIMATICS5ProgrammersPortAS511SIMATICS5Serial3964RSIMATICTIEthernetLayer4SIMATICTISerial為了寫位或字節(jié)，通道單元使用BinWrite機制首先讀取整個數(shù)據(jù)字。已編址的位或字節(jié)在已讀取的字中改變。然后，整個字(！)而不只是修改過的位或字節(jié)會被寫回內(nèi)存。在以下說明中，位x的數(shù)值通過使用BinWrite機制設(shè)置為1。注意如果AS中的字在WinCC使用BinWrite機制讀取過后，進行了修改(參見說明中的“問題案例”)，則當(dāng)WinCC把字寫回內(nèi)存時，會覆蓋由AS改變的數(shù)據(jù)。用BinWrite組態(tài)變量如果想為不支持位/字節(jié)訪問的通訊驅(qū)動程序通道單元組態(tài)“二進制變量”，必須使用對話框激活并且組態(tài)BinWrite機制，否則不可用。先決條件必須安裝所需要的通訊處理器和硬件驅(qū)動程序。必須安裝不支持位/字節(jié)訪問的期望的通訊驅(qū)動程序，例如“SIMATICS5EthernetLayer4”。必須使用其中一個通道單元建立連接。步驟步驟
1為需要的連接打開彈出式菜單，創(chuàng)建新變量然后選擇“新建變量...”。“創(chuàng)建新變量”對話框?qū)⒋蜷_。
2在“常規(guī)”標(biāo)簽卡上，“名稱”域中，輸入在項目范圍內(nèi)唯一的變量名稱。為數(shù)據(jù)類型選擇“二進制變量”、“無符號8位數(shù)”或“有符號8位數(shù)”。
3單擊“選擇”按鈕，打開“位/字節(jié)變量”對話框。(在用位/字節(jié)訪問通道的情況下，該按鈕用來訪問為AS中的地址區(qū)域所做的設(shè)置。)
4單擊“訪問位”或“訪問字節(jié)”復(fù)選框并且保留設(shè)置。在對話框中查到的內(nèi)容與步驟2中所選的數(shù)據(jù)類型有關(guān)。
5單擊“確定”關(guān)閉對話框。
注意：如果忘記為新的“二進制變量”或8位變量激活BinWrite機制，該對話框仍會打開。如果企圖單擊“確定”立刻關(guān)閉“創(chuàng)建新變量”對話框，則會顯示“地址參數(shù)無效”的錯誤消息。通過“是”進行確認(rèn)。這將打開“位/字節(jié)變量”對話框，在此用戶可進行所需要的設(shè)置。
