Schneider 140DDI85300
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計(jì)算機(jī)與PLC之間的通信是建立在以RS232標(biāo)準(zhǔn)為基礎(chǔ)的異步雙向通信上的，F(xiàn)X系列PLC有其特定的通信格式，整個(gè)通信系統(tǒng)采用上位機(jī)主動(dòng)的通信方式，PLC內(nèi)部不需要編寫(xiě)專門(mén)的通信程序，只要把數(shù)據(jù)存放在相應(yīng)的數(shù)據(jù)寄存器中即可，每個(gè)數(shù)據(jù)寄存器都有相應(yīng)的物理通信地址，通信時(shí)計(jì)算機(jī)直接對(duì)物理通信地址進(jìn)行操作。通信過(guò)程中，傳輸字符和命令字以ASCⅡ碼為準(zhǔn)，常用的字符及其ASCⅡ碼對(duì)應(yīng)關(guān)系。
計(jì)算機(jī)與PLC進(jìn)行通訊時(shí)，計(jì)算機(jī)與PLC之間是以幀為單位進(jìn)行信息交換的，其中控制字符ENQ、ACK、NAK，可以構(gòu)成單字符幀發(fā)送和接受，其余的信息幀發(fā)送和接受時(shí)都是由字符STX、命令字、數(shù)據(jù)、字符ETX以及和校驗(yàn)5部分組成
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廈門(mén)莫格電氣自動(dòng)化有限公司
：劉水仙（銷(xiāo)售工程師）
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主營(yíng)業(yè)務(wù)：AB，ABB，GE，本特利，?？怂共_，英維斯，西屋，艾默生，橫河
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ALLEN BRADLEY MATGUARD SAFETY MAT 440F-M1015BYNN, NEW
TURCK BIM-AKT-AD4X PROXIMITY SENSOR, NNB
EATON CUTLER-HAMMER 20-250VAC 3-PIN PROXIMITY SENSOR E57MAL18A2B1
EATON CUTLER-HAMMER 6-48VDC INDUCTIVE PROXIMITY SENSOR, E57LAL12T110SD *NEW*
AIRPAX 3 DIGITAL TACHOMETER TACHTROL 3
FOXBORO TEMPERATURE SENSOR D3-130-012
BAUMER ELECTRIC IFRM 06P1501/S35L NIB
PEPPERL + FUCHS 20-2450VAC INDUCTIVE SENSOR NJ30+U2+W+BHMSS?P3-N.O. *NEW*
FOXBORO PRESSURE TRANSMITTER IFL10-D50H11F-Z?1F3 103981
ALLEN BRADLEY 200MA INDUCTIVE PROX. SENSOR SER.A NIB 871Z-DW2NP12-D4 100963
TURCK QUICK MOUNT FOR 18MM SENSOR QM-18L-T
SMC DC12-24V PNEUMATIC AUTO SWITCH D-J79W LOT OF 2
HONEYWELL MICRO SWITCH HEAVY DUTY LIMIT SWITCH LSF3K58
OMRON * PROXIMITY SWITCH * E2E-X7D1-N
FOXBORO ANALYTICAL CONDUCTIVITY SENSOR 871LC-EV3-1
BALLUFF SENSOR BES 517-400-S45
PEPPERL + FUCHS PROXIMITY SENSOR 85501 / NBB8-18GM50-E 101069
BANNER MULTI BEAM SCANNER BLOCK FX1 A LM3
BANNER OPTICAL TOUCH BUTTON SENSOR OTBVP6QD
ROCHESTER INSTRUMENT SYSTEMS 4-20mA 85-150VAC CURRENT TRANSDUCER UCXAF6
BANNER OPTICAL SENSOR BUTTON SWITCH OTC-1-BK 99467
TURCK CUSHION MOUNT BRACKET FOR 30MM SHIELDED SENSOR, CM-30 *NEW*
IFM ELECTRONIC 18-30VDC 5-100 PSI RANGE 1/4" NPT PRESSURE SENSOR, PB5224
NEO-DYN ITT INDUSTRIES ADJUSTABLE PRESSURE SWITCH 130P1S71
PEPPERL + FUCHS PROXIMITY SWITCH NL2-F-U-1.025-B?HMS3
ALLEN BRADLEY 40-250V AC/DC 3-PIN PROXIMITY SENSOR 871TM-B2N12-N3
EMECANIQUE 10 A AUXILIARY CONTACT BLOCK LA1 DN40 *LOT OF 5*
