變頻器控制方式特點(diǎn)：
其特點(diǎn)是控制電路結(jié)構(gòu)簡(jiǎn)單、成本較低，機(jī)械特性硬度也較好，能夠滿足一般傳動(dòng)的平滑調(diào)速要求，已在產(chǎn)業(yè)的各個(gè)域得到廣泛應(yīng)用。但是，這種控制方式在低頻時(shí)，由于輸出電壓較低，轉(zhuǎn)矩受定子電阻壓降的影響比較顯著，使輸出大轉(zhuǎn)矩減小。另外，其機(jī)械特性終究沒有直流電動(dòng)機(jī)硬，動(dòng)態(tài)轉(zhuǎn)矩能力和靜態(tài)調(diào)速性能都還不盡如人意，且系統(tǒng)性能不高、控制曲線會(huì)隨負(fù)載的變化而變化，轉(zhuǎn)矩響應(yīng)慢、電機(jī)轉(zhuǎn)矩利用率不高，低速時(shí)因定子電阻和逆變器死區(qū)效應(yīng)的存在而性能下降，穩(wěn)定性變差等。因此人們又研究出矢量控制變頻調(diào)速。
S7-1200通信和程序的特點(diǎn)：
S7-1200是西門子的新一代的控制器，在串口通信方面在硬件與軟件方面都與S7-200不同：通訊方面：作為200的升產(chǎn)品，1200不支持DP等應(yīng)用比較廣泛的通訊協(xié)議，但保留了強(qiáng)大的自由口通訊功能；程序方面：引入塊概念，更接近于300，編程方便，尤其是通訊方面的編程（自由口、MODBUS等，一個(gè)塊可以控制多個(gè)驅(qū)動(dòng)器，不同電機(jī)的數(shù)據(jù)存儲(chǔ)在不同的數(shù)據(jù)庫中；硬件方面：S7-1200現(xiàn)有的幾款PLC都可以擴(kuò)展3個(gè)串口通信模板（即可以全部是RS232接口，也可以全部是RS485接口，也可以是兩種接口的組合），而S7-200這不可以進(jìn)行擴(kuò)展，只能用本體上的RS485口，在這一點(diǎn)上功能強(qiáng)了。軟件方面：S7-1200，在編程上與S7-300的編程方法類似，組態(tài)完硬件接口，直接調(diào)用功能塊就可以，非常簡(jiǎn)單，不像S7-200需要對(duì)SM進(jìn)行操作。S7-1200與S7-300在串口通信比較起來基本上一樣，但在作Modbus的通信時(shí)不需要額外的Dongle來支持。
Allen Bradley 505-TOD Size 00 Starter 505TOD 120/110 VAC Coil T0D 500-TOD94
Allen Bradley 505-TOB-A1F Reversing Starter 110/120 VAC Coil 505-T0B-A1F
Allen Bradley 505-T0D-A1D Reversing Starter 110/120 VAC Coil 505-TOD-A1D
Allen Bradley 505-AO* Size 0 592-A1DA Motor Starter 505AO* 115-120 VAC 592A1DA
Allen Bradley 500L-COD94 60 Amp Contactor 120/110 VAC Coil 40420-452-04
Allen Bradley 500L-COD94 115-120 VAC Coil 60 Amp Contactor 500L-C0D94
Allen Bradley 500L-COD93 115-120 VAC Coil 60 Amp Contactor 500L-CO*93
Allen Bradley 500L-COD93 115-120 VAC Coil 60 Amp Contactor 500L-C0D93
Allen Bradley 500FL-EOD92 200 Amp Contactor 115-120 VAC Coil 500FL-E0D92
Allen Bradley 500FL-COD93 60 Amp Contactor Starter 115-120 VAC Coil 500FL-C0D93
Allen Bradley 500FL-C0*93 60 Amp Contactor Starter 115-120 VAC Coil 500FL-CO*93
Allen Bradley 500F-EOB930 Size 4 Contactor Starter 460-480 VAC Coil 500F-E0B930
Allen Bradley 500F-DOD930 Size 3 Contactor Motor Starter 500FDOD930 115-120 VAC
Allen Bradley 500F-DO*930 Size 3 Contactor Motor Starter 500F-DOD930 115-120 VAC
Allen Bradley 500F-COD930 Size 2 Contactor Starter 115-120 VAC Coil 500FCOD930
Allen Bradley 500-EOD930 Size 4 Contactor Starter 110/120 VAC Coil 500-E0D930
Allen Bradley 500-DOD930 Size 3 Contactor Motor Starter 115-120 VAC Coil Nice!!!
Allen Bradley 500-DOA930 Size 3 Motor Starter 500DOA930 230-240 VAC Coil
Allen Bradley 500-A0B94 Size 0 Motor Starter 500A0B94 460-480 VAC Coil AOB94
Allen Bradley 49099-C 709-COD Size 2 Reversing Part Winding Starter 120/110 VAC
Allen Bradley 45DLA-1LEB2E-F4 Emitter 45DLA1LEB2EF4
Allen Bradley 440T-MRPSE11MA Trapped Key Module M221-SE4612 M221-24475
Allen Bradley 440T-MRPSE11JA Trapped Key Module M221-SE4612 M221-24475
Allen Bradley 440R-N23125 MSR127T Guard Master 115 VAC Safety Relay Ser B
Allen Bradley 440R-N23119 MSR126.1R Guard Master 115 VAC Safety Relay
Allen Bradley 440R-J23045 Minotaur MSR11R 110 VAC Safety Relay 440RJ23045
Allen Bradley 440R-J23045 Minotaur MSR11R 110 VAC Safety Relay 440RJ23045
Allen Bradley 440R-G23029 GuardMaster AC/DC Safety Relay MSR10R/D MSR10 RD
Allen Bradley 440R-D23025 Minotaur MSR7C 110 VAC Safety Relay Ser A 440RD23025
Allen Bradley 440R-D22S2 GSR DIS Guard Master 24 VDC Safety Relay Ser A 201
Allen Bradley 440R-D22S2 GSR DIS Guard Master 24 VDC Safety Relay Ser A 200
Allen Bradley 440N-Z21S26B Guardmaster Sensor & Actuator Ser A Rev D
Allen Bradley 440N-G02095 B FRS-6 Safety Sensor Ferrogard 6 Guard master
Allen Bradley 440K-MT55066 Safety Interlock Switch Guard Master 440KMT55066
Allen Bradley 440F-C251D Guardmaster Safedge Control Unit 440FC251D
Allen Bradley 43GR-TBS15SL Glass Fiber Optic Cable 43GRTBS15SL
Allen Bradley 42KC-P2LNSM-P4 Photoswitch 12-24 VDC 42KCP2LNSMP4
Allen Bradley 42GTGF-10000-02 Photoelectric Photo Switch 42GTGF1000002 42GTGF
Allen Bradley 42DRA-5000 Photoelectric Photo Switch 42DRA5000 42DTB-5000 42DTB
Allen Bradley 42DRA-5000 Fiber Optic Photo Switch 42DRA5000 42DTB-5000 42DTB
Allen Bradley 42CRC-4001 Color Registration Photoswitch 20-30 VDC 42CRC4001
Allen Bradley 40193-415-52 Pilot Switch Assembly 800S 4019341552 (JK)
Allen Bradley 40104-401-01-3036 Size 4 Motor Starter 120/110 VAC 74A86 401044010
Allen Bradley 40023-441-10 Disconnect Fuse Block 600 V 60 Amp 4002344110
Allen Bradley 40021-567-02 3 P Disconnect Switch 60 Amp 600 V 40023-441-13
Allen Bradley 280D-FN-10-C ArmorStart Control Module 284D-FVD4P0Z-10-CR-SB-EMI
Allen Bradley 280D-FN-10-C ArmorStart Control Module 284D-FVD2P3Z-10-CR-A10-OC
Allen Bradley 280D-FN-10-C ArmorStart Control Module 284D-FVD1P4Z-10-CRW-EMI
Allen Bradley 280D-FN-10-C ArmorStart Control Module 284D-FVD1P4Z-10-CR-SB-EMI
Allen Bradley 2801-MVM Machine Vision Monitor Ser A Rev A 2801MVM
Allen Bradley 2755-SN5 Ser B Rev A AdaptaScan Scanner 2755SN5
Allen Bradley 2755-SN5 Ser B Rev A AdaptaScan Scanner 2755-NB40 2755SN5
Allen Bradley 2755-SN5 Ser B Rev A AdaptaScan Laser Scanner 2755SN5
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