DEVICENET參數(shù)通道說明

1、DEVICENET參數(shù)通道說明 以上說明僅供參考，詳細內容請參看SEW樣本 Fieldbus Unit Pro Parameter List1參數(shù)通道說明The M-files are divided into a request file (M0-file) and a response file (M1-file). The data transmission is shown in following Fig.2Request Telegram：34Cmd/status Code：5Class：Register object class (class 7)The SEW paramete

2、r data channel can be addressed using the services Get_Attribute_Single and Set_Attribute_Single. The following possibilities for addressing the parameter data channel derive from the way the register object is specified by DeviceNet so INPUT objects can only be read and OUTPUT objects can be read a

3、nd written.Parameter object class (class 15)The fieldbus parameters of the SEW inverter can be addressed directly via the instance with the parameter object. In order to comply with the DeviceNet specification, the data format for these instances deviates from the SEW fieldbus profile. However, it i

4、s also possible to address all parameters of the inverter via the parameter object. Instances 1 to 8 are reserved for this.6Instance：7Response Telegram： The return codes are sent back in a different format in conjunction with DeviceNet.The service code of an error message is always 94h (hex).The gen

5、eral error code of an inverter-specific return code is always 1Fh = proprietary error.The additional code is identical to the additional code low described in the manual for the fieldbus device profile.The example shows the proprietary error 10h = Impermissible parameter index.8TXID要自己定義；CMD：1為執(zhí)行，4為刪除；Connection固定為0；SIZE為報體的長度，單位是byte；Service: Eh為讀，10h為寫；MAC_ID：DFD11B的撥碼地址；讀或寫Parameter，Class 需設為7；Instance：1為讀，2為寫/讀；對應DeviceNet, Attribute固定為4；Data1為要讀取的Parameter的Index值.報頭報體N7：0到N7：8存放發(fā)送的報文；N7:0N7:1N7:2N7:3N7:4N7:5N7:6Example