AWH計重秤1.設(shè)定RS-232或串行打印機輸出F5當(dāng)與計算機聯(lián)機時，RS-232適配卡上之J1、J3短路。利用上數(shù)鍵＾鍵或去皮鍵選擇F5該電子秤數(shù)據(jù)通過RS-232通訊，傳訊模式設(shè)定為P2連續(xù)發(fā)送。數(shù)據(jù)格式：發(fā)送的數(shù)據(jù)包為一個字符串，包括18個字符。通訊程序：接受緩沖模塊：電子秤連續(xù)發(fā)送數(shù)據(jù)，不屬于應(yīng)答模式，通過示波器檢查，為20ms發(fā)送一個數(shù)據(jù)包。FUNCTION_BLOCKReadMsg_EL1VAR_INPUT(*輸入管腳定義*) CmdId2:BYTE;END_VARVAR_OUTPUT(*輸出管腳定義*) RcvBuf2:ULONG;(*接收緩存區(qū)*)(*發(fā)送數(shù)據(jù)長度*)END_VARVAR(*臨時變量定義*)END_VAR RcvBuf2=GW_DEFRCVBUF(CmdId2,18);END_FUNCTION_BLOCK接受緩沖模塊：接受緩沖模塊連續(xù)接受數(shù)據(jù)包，需要定時清緩沖區(qū)，用GW_STARTCMD(CmdId)功能。FUNCTION_BLOCKReceiveMsg_EL1VAR_INPUT(*輸入管腳定義*) CmdId:BYTE; END_VARVAR_OUTPUT(*輸出管腳定義*) MSG0,MSG1,MSG2,MSG3,MSG4,MSG5,MSG6,MSG7,MSG8,MSG9:BYTE; MSG10,MSG11,MSG12,MSG13,MSG14,MSG15,MSG16,MSG17:BYTE; DATALEN:UINT; END_VARVAR MsgBuf:ULONG; i,CmdId2:BYTE; b0,b1,b2,b3,b4,b5,b6,b7,b8,b9,b10,b11,b12,b13,b14,b15,b16,b17,b18:BYTE; MSG_TMP:BYTE; TMP_L1,TMP_L2:LONG;END_VARDATALEN=GW_GETRCVLEN(CmdId);IFDATALEN>0THENMsgBuf=GW_GETRCVMSG(CmdId); MSG0=GW_READBUF(MsgBuf,0); (**) MSG1=GW_READBUF(MsgBuf,1); (**) MSG2=GW_READBUF(MsgBuf,2); (**) MSG3=GW_READBUF(MsgBuf,3); (**) MSG4=GW_READBUF(MsgBuf,4); (**) MSG5=GW_READBUF(MsgBuf,5); (**) MSG6=GW_READBUF(MsgBuf,6); (**) MSG7=GW_READBUF(MsgBuf,7); (**) MSG8=GW_READBUF(MsgBuf,8); (**) MSG9=GW_READBUF(MsgBuf,9); (**) MSG10=GW_READBUF(MsgBuf,10); (**) MSG11=GW_READBUF(MsgBuf,11); (**) MSG12=GW_READBUF(MsgBuf,12); (**) MSG13=GW_READBUF(MsgBuf,13); (**) MSG14=GW_READBUF(MsgBuf,14); (**) MSG15=GW_READBUF(MsgBuf,15); (**) MSG16=GW_READBUF(MsgBuf,16); (**) MSG17=GW_READBUF(MsgBuf,17); (**) GW_STARTCMD(CmdId); END_IF; END_FUNCTION_BLOCK判斷模塊：連續(xù)接受的數(shù)