MODBUS設備使用[MBusDrv.dll]庫R / W數據訪問。
導出函數(pascal聲明):
{*來自MODBUS設備的標準讀取數據*}
函數GetMBData(const SlaveAddr:byte; const ReadType:boolean; var Data:array [0..254] of byte):integer; STDCALL;
SlaveAddr:byte(1..254)
ReadType:boolean(false = Coils / true =控制寄存器)
數據:字節的數組[0..254](器件數據)
返回整數(0 = OK)
{*從MODBUS設備擴展讀取數據*}
函數GetMBDataEx(const SlaveAddr:word; const ReadType:word):pointer; STDCALL;
SlaveAddr:word(1..254)
ReadType:字(0 =線圈/ 1 =保持寄存器)
255字節的返回指針(設備數據或0 =錯誤)
{* VBA(Microsoft Visual Basic)從MODBUS設備讀取數據*}
函數GetMBDataVBA(const SlaveAddr:LongInt; const ReadType:LongInt):pointer; STDCALL;
SlaveAddr:longint(1..254)
ReadType:longint(0 =線圈/ 1 =保持寄存器)
255字節的返回指針(設備數據或0 =錯誤)
{*標準寫入數據到MODBUS設備*}
函數PutMBData(const SlaveAddr:byte; const WriteType:boolean; const DataAddr:byte; const Data:word):integer; STDCALL;
SlaveAddr:byte(1 ..254)
WriteType:boolean(false = Coil / true =保持寄存器)
DataAddr:byte(1..255)
資料:字
返回整數(狀態碼= 0 = OK)
{* VBA(Microsoft Visual Basic)將數據寫入MODBUS設備*}
函數PutMBDataVBA(const SlaveAddr:longint; const WriteType:longint; const DataAddr:longint; const Data:longint):longint; STDCALL;
SlaveAddr:longint(1..254)
WriteType:longint(0 =線圈/ 1 =保持寄存器)
DataAddr:longint(1..255)
數據:longint
返回longint(狀態碼> = 0 = OK)
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MODBUS RTU Serial RS232/RS485 and TCP/IP for Windows
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