Schneider 140CPS11420
1.控制規(guī)模
控制規(guī)模代表PLC控制能力，看其能對(duì)多少輸入、輸出點(diǎn)及對(duì)多少路模擬進(jìn)行控制。
控制規(guī)模與速度有關(guān)。因?yàn)橐?guī)模大了，用戶程序也長(zhǎng)，執(zhí)行指令的速度不快，勢(shì)必延長(zhǎng)PLC循環(huán)的時(shí)間，也必然會(huì)延長(zhǎng)PLC對(duì)輸入信號(hào)的響應(yīng)。為了避免這個(gè)情況，PLC的工作速度就要快。所以，大型PLC的工作速度總是比小的要快。
控制規(guī)模還與內(nèi)存區(qū)的大小有關(guān)。規(guī)模大，用戶程序長(zhǎng)，要求有更大的用戶存儲(chǔ)區(qū)。同時(shí)點(diǎn)數(shù)多，系統(tǒng)的存儲(chǔ)器輸入、輸出的信號(hào)區(qū)（輸入輸出繼電器區(qū)或稱輸入、輸出映射區(qū)）也大。這個(gè)區(qū)大，相應(yīng)地內(nèi)部器件（解釋見后）也要增多，這些都要求有更大的系統(tǒng)存儲(chǔ)區(qū)。
控制規(guī)模還與輸入、輸出電路數(shù)有關(guān)。如控制規(guī)模為1024點(diǎn)，那就得有1024條I/O電路。這些電路集成于I/O模塊中，而每個(gè)模塊有多少路的I/O點(diǎn)總是有數(shù)的。所以，規(guī)模大，所使用的模塊也多。
控制規(guī)模還與PLC指令系統(tǒng)有關(guān)。規(guī)模大的PLC指令條數(shù)多，指令的功能也強(qiáng)，才能應(yīng)付對(duì)點(diǎn)數(shù)多的系統(tǒng)進(jìn)行控制的需要。
控制規(guī)模是對(duì)PLC其它性能指標(biāo)起著制約作用的指標(biāo)；也是PLC劃分為微、小、中、大和特大型
2.組成模塊
PLC的結(jié)構(gòu)雖有箱體及模塊式之分，但從質(zhì)上看，箱體也是模塊，只是它集成了更多的功能。在此，不妨把PLC的模塊組成當(dāng)作所有PLC的結(jié)構(gòu)性能。
這個(gè)性能含義是指某型號(hào)PLC具有多少種模塊，各種模塊都有什么規(guī)格，并各具什么特點(diǎn)。
一般講，規(guī)模大的PLC，檔次高的PLC模塊的種類也多，規(guī)格也多，反映它的特點(diǎn)的性能指標(biāo)也高。但模塊的功能則單一些。相反，小型PLC、檔次低的PLC模塊種類也少，規(guī)格也少，指標(biāo)也低。但功能則多樣些，以至于集成為箱體。
組成PLC的模塊是PLC的硬件基礎(chǔ)，只有弄清所選用的PLC都具有那些模塊及其特點(diǎn)，才能正確選用模塊，去組成一臺(tái)完整的PLC，以滿足控制系統(tǒng)對(duì)PLC的要求。
廈門莫格電氣自動(dòng)化有限公司
：張 美 霞
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YALE 90PSI 1/2TON PNEUMATIC CHAIN HOIST KAL1/2-10LG25S1
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WRIGHT 2-TON TROLLEY GEARED-MODEL 80
REX 10FT TABLETOP CHAIN S 815TK7-1/2
COLUMBUS MCKINNON CM 4-TON ROLLER BEARING TROLLEY SERIES 639, NEW
BLACK & DECKER 2-SPEED 1-1/4" H.D. MAGNETIC DRILL PRESS NO. 1554 W/ base TYPE 1
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CAMPBELL 3/32" (2MM)-1/8" (3MM) WIRE ROPE CLIPS, B7670419 *NEW LOT OF 10*
BANNER 75 X 75MM RETROREFLECTIVE TAPE, BRT-THG-3X3-10 *NEW LOT OF 10*
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ConTROL WORKS INC S.S. 1 DOOR CABINET, 60 X 36 X 12
KADANT BLACK CLAWSON 61.5" LONG CLEANER TUBE
AERO-MOTIVE 4-10LB 1.8-4.5KG CAPACITY BALANCER, 10F
GOLD CASTER 300 x 45, POLYURETHANE WHEEL WITH STOP J-200S *NEW*
4-1/8" HEAVY DUTY VISE
WEBSTER 52" ConVEYOR ROLLER S1-4374-1
INGERSOLL-RAND ARO 7718E-2C12-K8S IND ROLLER CHAIN HOIST SERIES 7700 1/4 TON
CM BIG ORANGE 1/8" WIRE ROPE CLIPS 2G804, LOT OF 20 *NEW*
4-5/8" HEAVY DUTY VISE
S-K IND. CO., LTD 12" MAGNETIC VIBRATOR FEEDER BOWL TYPE SK-B
6" ROLLER 62-3/4" ROLLER LENGTH OVERALL 70-3/4" ConVEYOR ROLLER
FAIRBANKS 4"X2" WHEEL, 5-3/4" HEIGHT, STRAIGHT MOUNTED, RIGID CASTER N32-4
INGERSOLL-RAND ARO SERIES 7700 1/4TON HOIST, NO LABEL
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BUDGIT HOOK MOUNTED 1/2TON ELECTRIC HOIST BEH5016
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84' 3/4" WIRE ROPE 511-4052
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YALE KAL2-10LG111/2S?2 AIR HOIST 2 TON 90 PSI 71 CFM
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COMMERCIAL GROUP PRODUCT 132' OAL, 7/16" DIA BUTTON END WIRE ROPE SW-714 *NEW*
ConVEYOR RETURN TRAINING IDLER 4600S 51.88 LENGTH
3M 4" x 6" STICKY PAD 70-0160-7052-9 *NEW* LOT OF 192
INGERSOLL RAND ARO 1/4 TON ROLLER CHAIN HOIST 7718E-2K-K
XTREME KLEEN XK13NEC6-7 WHITE GLOVE BLUE CUFF, LOT OF 288 NEW
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SEALED AIR CORP. 220V 24A 1PH 50/60HZ 901 INSTAPAK 18205 W/ (2) 8448AS-01
38-1/2" ConVEYOR RETURN TRAINING IDLER
BISON HERCULES GENERAL PURPOSE WIRE ROPE, 6 X 26 BRT EIPS, 5/16" DIA 1000 FT NEW
CM CYCLONE 23' CHAIN LENGTH 4-TON HAND HOIST MODEL S
PANASonIC 328' FILM CARTRIDGE KX-FA135 *NEW*
NORTON 30" X 3" X 305 GRINDING WHEEL 55A605-I10VH, NEW, BOX OF 2
MORSE 60 O/L OFFSET CHAIN linkS, 127868 *NEW LOT OF 12*
8" PITCH 12" ROLLER WIDTH 2" ROLLER DIA. 2" PLATE HEIGHT 1" PIN DIA DRAG CHAIN
TB WOODS 11.0 X 2 B-SK CONV SHEAVE, 1102B *NEW*
SERVICE ENGINEERING INC 12CW SIZE VIBRATORY FEEDER BOWL
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CM COLUMBUS MCKINNON CYCLONE HAND HOIST, 1 TON
COFFING 1-TON CHAIN HAND HOIST
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BABBITT ADJUSTABLE SPROCKET RIM NO. 2 103370
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