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選型注意事項(xiàng)

  S7-300PLC的選型原則是據(jù)生產(chǎn)工藝所需的功能和容量進(jìn)行選型，并考慮維護(hù)的方便性、備件的通用性，以及是否易于擴(kuò)展和有無(wú)特殊功能等要求。選型時(shí)具體注意以下幾方面：

  (1)有關(guān)參數(shù)確定。一是輸入/輸出點(diǎn)數(shù)(I/O點(diǎn)數(shù))確定。這是確定PLC規(guī)模的一個(gè)重要依據(jù)，一定要根據(jù)實(shí)際情況留出適當(dāng)余量和擴(kuò)展余地。二是PLC存儲(chǔ)容量確定。注意當(dāng)系統(tǒng)有模擬量信號(hào)存在或要進(jìn)行大量數(shù)據(jù)處理時(shí)，其存儲(chǔ)容量應(yīng)選大一些。

  (2)系統(tǒng)軟硬件選擇。一是擴(kuò)展方式選擇，S7-300PLC有多種擴(kuò)展方式，實(shí)際選用時(shí)，可通過(guò)控制系統(tǒng)接口模塊擴(kuò)展機(jī)架、Profibus-DP現(xiàn)場(chǎng)總線、通信模塊、運(yùn)程I/O及PLC子站等多種方式來(lái)擴(kuò)展PLC或預(yù)留擴(kuò)展口;二是PLC的聯(lián)網(wǎng)，包括PLC與計(jì)算機(jī)聯(lián)網(wǎng)和PLC之間相互聯(lián)網(wǎng)兩種方式。因S7-300PLC的工業(yè)通信網(wǎng)絡(luò)淡化了PLC與DCS的界限，聯(lián)網(wǎng)的解決方案很多，用戶可根據(jù)企業(yè)的要求選用;三是CPU的選擇，CPU的選型是合理配置系統(tǒng)資源的關(guān)鍵，選擇時(shí)必須根據(jù)控制系統(tǒng)對(duì)CPU的要求(包括系統(tǒng)集成功能、程序塊數(shù)量限制、各種位資源、MPI接口能力、是否有

  PROFIBUS-DP主從接口、RAM容量、溫度范圍等)，并好在西門(mén)子公司的技術(shù)支持下進(jìn)行，以獲得合理的選型;四是編程軟件的選擇，這主要考慮對(duì)CPU的支持狀況，我們的體會(huì)是：STEP7V4.0對(duì)有些型號(hào)的CPU不支持，硬件組態(tài)時(shí)會(huì)發(fā)生故障出錯(cuò)，而STEP7V5.0則不存在這種問(wèn)題。

  二、設(shè)計(jì)及使用注意事項(xiàng)

  1. 設(shè)計(jì)注意事項(xiàng)

  設(shè)計(jì)時(shí)主要應(yīng)注意以下幾方面：

  (1)PLC輸出電路中沒(méi)有保護(hù)，因此在外部電路中應(yīng)設(shè)置串聯(lián)熔斷器等保護(hù)裝置，以防止負(fù)載短路造成PLC損壞。熔斷器容量一般為0.5A。

  (2)PLC存在I/O響應(yīng)延遲問(wèn)題，因此在快速響應(yīng)設(shè)備中應(yīng)加以注意。MPI通信協(xié)議雖簡(jiǎn)單易行，但響應(yīng)速度較慢。

  (3)編制控制程序時(shí)，好用模塊式結(jié)構(gòu)程序。這樣既可增強(qiáng)程序的可讀性，方便調(diào)試和維護(hù)工作;又能使數(shù)據(jù)庫(kù)結(jié)構(gòu)統(tǒng)一，方便WinCC組態(tài)時(shí)變量標(biāo)簽的統(tǒng)一編制和設(shè)備狀態(tài)的統(tǒng)一顯示。

  (4)硬件資源。要合理配置硬件資源，以提高系統(tǒng)可靠性。如PLC電源配電系統(tǒng)要配備冗余的UPS不間斷電源，以排除停電對(duì)全線運(yùn)行的不利影響。又如對(duì)電機(jī)的控制回路要進(jìn)行繼電器隔離，以消除外部負(fù)載對(duì)I/O模塊的可能損壞。另外，系統(tǒng)設(shè)備要采用獨(dú)立的接地系統(tǒng)，以減少雜波干擾。

ABB YB560103-AS DSQC 208A External axis board 
ABB YB560103-AL DSQC 209 Analogue I/O board 
ABB YB560103-AM DSQC 210 Safety board 
ABB YB560103-AN DSQC 211 Power supply 
ABB YB560103-BF DSQC 215 Robot computer 
ABB YB560103-AZ DSQC 220 Programming board 
ABB YB560103-BD DSQC 223 PC Board digital I/O 
ABB YB560103-BE DSQC 224 PC Board combi I/O 
ABB YB560103-BK DSQC 227 Winchester interface 
ABB YB560103-BD DSQC 228 Safety board 
ABB YB560103-BN DSQC 230 Robot computer 
ABB YB560103-BS DSQC 233 External axis board 
ABB YB560103-BY DSQC 235A Rectifier 
ABB YB560103-BZ DSQC 235B Rectifier 
ABB YB560103-CA DSQC 236A Drive unit 
  DSQC 236B Drive 
ABB YB560103-CC DSQC 236C Drive unit 
ABB 3HAB2207-1 DSQC 236D Drive unit 
ABB YB560103-CD DSQC 236G Drive unit 
ABB 3HAB2245-1 DSQC 236H Drive unit 
ABB 3HAA3563-AJA DSQC 236P Drive unit 
ABB YB560103-CE DSQC 236T Drive unit 
  DSQC 239 Board - ABB RIO 
ABB  DSQC 241 Power supply 
ABB YB560103-CM DSQC 242 Programming board 
ABB 3HAA0001-CP DSQC 243 Serial measurement board 
ABB 3HAA3563-ACA DSQC 245 Serial measurement board 
ABB 3HAA3563-AAA DSQC 248 Programming board 
ABB 3HAA3563-AGA DSQC 249A Rectifier 
ABB 3HAA3563-AHA DSQC 249B Rectifier 
ABB 3HAA3563-AD DSQC 252 System board 
 E3HAC028756-001 DSQC 253 SMB unit DSQC 573 
 E3HAA3563-AMA DSQC 253 Serial Measurement Board 
 E3E 042816 DSQC 253 Exch. Serial mes. DSQC 253W 
 6369901-218 DSQC 253 Serial Measurement Board 
ABB 3HAB2211-1 DSQC 256A System board 
ABB 3HAA3563-AUA DSQC 258 Power supply 
ABB 3HAB8797-1 DSQC 266B Drive unit 
ABB 3HAB8798-1 DSQC 266C Drive unit 
ABB 3HAB8801-1 DSQC 266G Drive unit 
ABB 3HAB8800-1 DSQC 266H Drive unit 
ABB 3HAB8799-1 DSQC 266K Drive unit 
ABB 3HAB8802-1 DSQC 266T Drive unit 
ABB 3HAA3573-AAA DSQC 300 Board - Computer 
ABB 3HAB2210-1 DSQC 300 Board - Computer 
ABB 3HAB2233-1 DSQC 300 Board - Computer 
ABB 6369901-380 DSQC 300 Board - Computer 
ABB 3HAA3573-ABA DSQC 301 Programming board 
ABB 3HAB2209-1 DSQC 306 Computer board 
ABB 6369901-298 DSQC 306 Computer board 
ABB E3HAB2209-1 DSQC 306 Computer board 
ABB 3HAB3700-1 DSQC 313 Serial measurement board 
ABB 3HAB4259-1 DSQC 313 Serial measurement board 
ABB 3HAC9522-1 DSQC 313 Serial Measurement Board 
ABB 3HAB2215-1 DSQC 314A Rectifier 
ABB 3HAB2216-1 DSQC 314B Rectifier 
ABB 3HAB2231-1 DSQC 314C Rectifier DC b 
ABB 6369901-336 DSQC 314C Rectifier DC b 
ABB E3HAB2231-1 DSQC 314C Rectifier DC b 
ABB 3HAB2214-1 DSQC 315 Combi I/O 
ABB 3HAB2219-1 DSQC 316 Computer board 
ABB 3HAB2209-1 DSQC 317 Memory expansion board 
ABB 3HAB2233-1 DSQC 322 Robot computer 
ABB 3HAB5956-1 DSQC 323 Memory expansion board 
ABB 3HAB5957-1 DSQC 324 Memory expansion board 
ABB 3HAB2241-1 DSQC 325 Main computer 
ABB 3HAB2242-1 DSQC 326 Robot computer 
ABB 3HAB7230-1 DSQC 327 Analogue Digital Combi I/O 
ABB 3HAB7229-1 DSQC 328 Digital 24 VDC I/O 
ABB 3HAB7215-1 DSQC 331 Panel unit 
ABB 3HAC17973-1 DSQC 332 Digital relay I/O 
ABB 3HAB5845-1 DSQC 334 Power supply 
ABB 3HAB6182-1 DSQC 335 Robot computer 
ABB 3HNE00001-1 DSQC 336 Network board NIOC-01 
ABB 3HAB8101-1 DSQC 345A Rectifier 
ABB 3HAB8101-2 DSQC 345B Rectifier 
ABB 3HAB8101-3 DSQC 345C Rectifier 
ABB 3HAB8101-4 DSQC 345D Rectifier 
ABB 3HAB8101-14 DSQC 345E Rectifier 
ABB 3HAB8101-5 DSQC 346A Drive unit 
ABB 3HAB8101-6 DSQC 346B Drive unit 
ABB 3HAB8101-7 DSQC 346C Drive unit 
ABB 3HAB8101-11 DSQC 346E Drive unit 
ABB 3HAB8101-8 DSQC 346G Drive unit 
ABB 3HAB8101-13 DSQC 346U Drive unit 
ABB 3HNE00957-1 DSQC 350 Remote I/O 
ABB 3HNE00065-1 DSQC 354 Encoder interface 
  DSQC 355 I/O Board 
ABB 3HAB8101-10 DSQC 358C Drive unit / Rectifier 
ABB 3HAB8101-12 DSQC 358E Drive unit / Rectifier 
ABB 3HAB8101-15 DSQC 358F Driveunit / Rectifier 
ABB 3HAB8101-16 DSQC 358G Drive unit / Rectifier 
ABB 3HAC0373-1 DSQC 361 Main computer 
ABB 3HAC1462-1 DSQC 363 Robot computer 
ABB 3HAC1620-1 DSQC 365 Power supply 
ABB 3HAC3180-1 DSQC 373 Robot computer 
ABB 3HAC3462-1 DSQC 374 Power supply 
ABB 3HAC10597-1 DSQC 386 Devicenet gateway 
ABB 3HAC3616-1 DSQC 500 Main computer 
ABB 3HAC3619-1 DSQC 503 Axis computer 
ABB 3HAC4297-1 DSQC 506 Power supply 
ABB 3HAC5393-2 DSQC 508 Battery unit 
ABB 3HAC5687-1 DSQC 509 Panel unit 
ABB 3HAC7519-2 DSQC 518A Flash disk 64Mb 
ABB 3HAC7519-3 DSQC 518B Flash disk 128Mb 
ABB 3HAC8848-1 DSQC 522 I/O computer board 
ABB 3HAC12158-1 DSQC 532 I/O Computer 
ABB 3HAC14265-1 DSQC 539 Power supply 
ABB 3HAC14279-1 DSQC 540 Main computer 
ABB 3HAC16917-3 DSQC 544A Flash disk 64Mb 
ABB 3HAC16917-4 DSQC 544B Flash disk 128Mb 
ABB 3HAB8101-19 DSQC 545A Rectifier 
ABB 3HAB8101-18 DSQC 546A Drive unit 
ABB 3HAC17396-1 DSQC 562 Serial measurement board 
ABB 3HAC022104-001 DSQC 564A Flash disk 64Mb 
ABB 3HAC022104-002 DSQC 564B Flash disk 128Mb 
ABB 3HAC020466-1 DSQC 627 Power supply 
ABB 3HAC025918-001 DSQC 653 Digital relay 
ABB 3HAC025465-004 DSQC 656 Flash disk 256Mb 
ABB YB560103-BD DSQC223 I/O Card  
ABB YB560103-BL DSQC228  
ABB YB560103-CA DSQC236A DriveUnit  
ABB 3HAA 3562-AGA/2 DSQC249A PowerUnit  
ABB 3HAA 3563-ALA/2 DSQC252  
ABB 3HAB 2211-1/1 DSQC256A  
ABB 3HAB2213-1/3 DSQC313  
ABB 3HAB6372-1 DSQC330 S4C Rechner Rack 
ABB 3HAB7215-1/07 DSQC331 S4C Safety Board 
ABB cable DSQC352 Profibus 
ABB cannot find pn DSQC355 Analogbaugruppe 
ABB YB161100-DP DSQS 174 Teach pendant S2 
ABB YB161100-DR DSQS 174 Teach pendant S2 
ABB 48990001-FE DSSR 115 Power supply 
ABB 48990001-FK DSSR 116 Power supply 
ABB 3HAC023195-1 Flexpendant Teach pendant IRC5 
ABB 6397103-GA IRB1000 Wrist 
ABB 3HAC7842-1 IRB140 Motor 
ABB 3HAC7866-1 IRB140 Motor 
ABB 3HAB3125-1 IRB1400 Motor 
ABB 3HAB3388-1 IRB1400 Wrist 
ABB 3HAC021458-1 IRB1400 / IRB2400 Motor 
ABB 3HAA2120-1 IRB1500 Motor 
ABB 3HAA2465-1 IRB1500 Gear 
ABB 3HAA2596-2 IRB2000 Lower cable 
ABB 3HAA2609-2 IRB2000 Bellow cables 
ABB 3HAB3016-1 IRB2000 Lower c