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現(xiàn)要我要做一臺統(tǒng)計用水量。流量計通訊協(xié)義L_mag 電磁流量計轉(zhuǎn)換器
Modbus 通訊協(xié)議V77.買了一個三菱485通訊模塊連接。
表2-1 L-mag 電磁流量計Modbus 通訊地址表
Protocol Addresses（Decimal）      Protocol Addresses（HEX） 數(shù)據(jù)格式                         寄存器定義
4112                                                                0x1010                   Float Inverse                     瞬時流量浮點表示
4114                                                                0x1012                   Float Inverse                     瞬時流速浮點表示
4116                                                                 0x1014                  Float  Inverse                     流量百分比浮點表示（電池供電表保留）
4118                                                                  0x1016                 Float  Inverse                     流體電導(dǎo)比浮點表示
4120                                                                  0x1018                 Long  Inverse                     正向累積數(shù)值整數(shù)部分
4122                                                                   0x101A                Float   Inverse                    正向累積數(shù)值小數(shù)部分
4124                                                                   0x101C               Long     Inverse                   反向累積數(shù)值整數(shù)部分
4126                                                                    0x101E               Float    Inverse                   反向累積數(shù)值小數(shù)部分
4128                                                                   0x1020                 Unsigned short                  瞬時流量單位（表3）
4129                                                                     0x1021                Unsigned short                 累積總量單位（表4/表5）
4130                                                                   0x1022                 Unsigned  short                 上限報警
4131                                                                    0x1023                 Unsigned  short                 下限報警
4132                                                                  0x1024                 Unsigned short                   空管報警
4133                                                                   0x1025                  Unsigned short                  系統(tǒng)報警
那位大俠能否指導(dǎo)下。第一次寫這個通訊程序

左側(cè)價格  帶modbus 的 ADP 模塊  直接用 modbus專用指令就好了ADPRW       但是做通訊不太建議用3GA   因為 3GA  的很多數(shù)據(jù)轉(zhuǎn)換指令被閹割了  處理數(shù)據(jù) 很麻煩      
  剛好有個5U的項目  也是用這個    截圖給你 參考下    順便吐槽一下  5U的標(biāo)簽區(qū)域真TMD的小   ST里面 還不支持 新建臨時變量