prodave支持与S7-200的通讯,但是在老版本中支持的并不是很好,到了V5.5以上版本时,对200的支持增强了,目前很多组态软件都用这个.看过pradave说明的人都了解通讯函数的声明,但是vb.net中变量类型的改变给我们带来了一定的麻烦,开始以为是prodave不支持,后来仔细读了说明,再仔细研究了一下vb.net的变量说明,才发现原因所在,为方便大家引用这里把声明部分贴出来共享: WWW_PLCJS_COM－PLC－技.术_网
Public Declare Function load_tool Lib "w95_s7.dll" (ByVal nr As Byte, ByVal dev As String, ByRef adr As PLCAdrType) As Integer WWW_PLC※JS_COM－PLC－技.术_网(可编程控※制器技术门户)
Public Declare Function new_ss Lib "w95_s7.dll" (ByVal nr As Byte) As Integer WWcW_PLCJS_COM－PLC－技.术_网
Public Declare Function unload_tool Lib "w95_s7.dll" () As Integer WWW※PLCJS_COM－PL＃C－技.术_网(可编※程控※制器技术门户)
#Region "S7-200" WWW_PLC※JS_COM－PLC－技.术_网(可编程控※制器技术门户)
Public Declare Function as200_e_field_read Lib "w95_s7.dll" (ByVal nr As Short, ByVal anz As Short, ByRef value As Byte) As Integer WWcW_PLCJS_COM－PLC－技.术_网
Public Declare Function as200_a_field_read Lib "w95_s7.dll" (ByVal nr As Short, ByVal anz As Short, ByRef value As Byte) As Integer WWW_PLCJS_COM－PLC－技.术_网
Public Declare Function as200_a_field_write Lib "w95_s7.dll" (ByVal nr As Short, ByVal anz As Short, ByRef value As Byte) As Integer WWW_PLCJS※COM－PLC－技×术_网(可编程控※制器技术门户)
Public Declare Function as200_m_field_read Lib "w95_s7.dll" (ByVal nr As Short, ByVal anz As Short, ByRef value As Byte) As Integer WWW_P※LCJS_COM－PLC－)技.术_网
Public Declare Function as200_m_field_write Lib "w95_s7.dll" (ByVal nr As Short, ByVal anz As Integer, ByRef value As Byte) As Integer WWW_P※LCJS_COM－PLC－)技.术_网
Public Declare Function as200_t_field_read Lib "w95_s7.dll" (ByVal nr As Short, ByVal anz As Short, ByRef value As Short) As Integer WWW_PLC※JS_COM－PmLC－技.术_网
Public Declare Function as200_z_field_read Lib "w95_s7.dll" (ByVal nr As Short, ByVal anz As Short, ByRef value As Short) As Integer plcjs.技.术_网
Public Declare Function as200_z_field_write Lib "w95_s7.dll" (ByVal nr As Short, ByVal anz As Short, ByRef value As Short) As Integer WWW_P※LCJS_COM－PLC－)技.术_网
Public Declare Function as200_sm_field_read Lib "w95_s7.dll" (ByVal nr As Short, ByVal anz As Short, ByRef value As Byte) As Integer P_L_C_技_术_网——可——编——程——控－制－器－技——术——门——户
Public Declare Function as200_sm_field_write Lib "w95_s7.dll" (ByVal nr As Short, ByVal anz As Short, ByRef value As Byte) As Integer WW.W_PLC※JS_C,OM－PL,C－技.术_网