Schneider PC-E984-685
1.控制规模
控制规模代表PLC控制能力，看其能对多少输入、输出点及对多少路模拟进行控制。
控制规模与速度有关。因为规模大了，用户程序也长，执行指令的速度不快，势必延长PLC循环的时间，也必然会延长PLC对输入信号的响应。为了避免这个情况，PLC的工作速度就要快。所以，大型PLC的工作速度总是比小的要快。
控制规模还与内存区的大小有关。规模大，用户程序长，要求有更大的用户存储区。同时点数多，系统的存储器输入、输出的信号区（输入输出继电器区或称输入、输出映射区）也大。这个区大，相应地内部器件（解释见后）也要增多，这些都要求有更大的系统存储区。
控制规模还与输入、输出电路数有关。如控制规模为1024点，那就得有1024条I/O电路。这些电路集成于I/O模块中，而每个模块有多少路的I/O点总是有数的。所以，规模大，所使用的模块也多。
控制规模还与PLC指令系统有关。规模大的PLC指令条数多，指令的功能也强，才能应付对点数多的系统进行控制的需要。
控制规模是对PLC其它性能指标起着制约作用的指标；也是PLC划分为微、小、中、大和特大型
2.组成模块
PLC的结构虽有箱体及模块式之分，但从质上看，箱体也是模块，只是它集成了更多的功能。在此，不妨把PLC的模块组成当作所有PLC的结构性能。
这个性能含义是指某型号PLC具有多少种模块，各种模块都有什么规格，并各具什么特点。
一般讲，规模大的PLC，档次高的PLC模块的种类也多，规格也多，反映它的特点的性能指标也高。但模块的功能则单一些。相反，小型PLC、档次低的PLC模块种类也少，规格也少，指标也低。但功能则多样些，以至于集成为箱体。
组成PLC的模块是PLC的硬件基础，只有弄清所选用的PLC都具有那些模块及其特点，才能正确选用模块，去组成一台完整的PLC，以满足控制系统对PLC的要求。
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LIFTING CHAIN 57500 LB CAP 24' & 11" LENGTH
BLACK & DECKER 120VAC/DC 18.0A 900/350RPM TWO SPEED SUPER POWER UNIT 748 TYPE B
REVVO HEAVYDUTY STEEL CASTERS TFH125 NNB
YALE * 6-TON CHAIN HOIST * NO LABEL
INGERSOLL-RAND IRAX 30-40KG 66-88LBS. CAPACITY SPRING BALANCER BSD 40
INTERROLL DRIVEROLL 96:1 RATIO 24VDC 1.10A CONVEYOR 43716
CHICAGO PNEUMATICS 70-85LBS, SUPER DUTY BALANCER 2200 EJER
CROSBY RED SWIVEL HOIST HOOK 30T
KNIGHT 500LB MAX CAPACITY. -20o TO 248oF LOAD TROLLEY WITH YOKE MRTA5309
CASCADE PUSH/PULL LIFT TRUCK ATTACHMENT 45E-LB-300
YAJIMA KOGYO 10" VIBRATORY BOWL PARTS FEEDER NFSIS-0010
CLEVELAND TRAMRAIL 75AMP 600 VOLT TYPE ST
ZIMMERMAN HANDLING SYSTEMS CONTROL KIT 15300-12 NIB
YAJIMA KOGYO 10" VIBRATORY BOWL PARTS FEEDER NF-SSS-0005
DENGENSHA 16" VIBRATORY BOWL PARTS FEEDER AF-VNS-H0G25-10?-DLH
AURORA CRANE 12000lbs. WINCH ACC-12 W/ ROLLER STATOR MOTOR, NO CABLE
GREENLEE 3548 WORK BOX, 23.0 CUBIC FEET, 48" X 24" X 35"
UNIFIED INDUSTRIAL 1000LBS. HOIST TROLLEY DET 113-C 105493
REXNORD TROUGHING TRAINING IDLER 42-C6310-0
SERVICE ENGINEERING INC BULK RATE VIBRATORY FEEDER BOWL 238636
TOTER INCORPORATED POWER UNIT 3078-00-3003 W/ 1755/1420RPM 5HP LINCOLN MOTOR
YAJIMA KOGYO 10" VIBRATORY BOWL PARTS FEEDER NFSIS-0006
FMC 115V 60HZ MAGNET, 215498-K
REXNORD CONVEYOR IDLER ROLLER 48-FC6041-17
LYON 10-DRAWER SAFETYLINK STORAGE CABINET MSS II, DRAWERS
BALL NUT, AN-15,NIB
PALMGREN 6.5" OPEN HEAVY DUTY VISE
AERO-MOTIVE 3.6-6.8KG RETRACTOR BALANCER, 15FGG
INGERSOLL-RAND 10-18KG / 22-40LB CAPACITY, 2000MM / 6.6FT LIFT BALANCER B41
REXNORD TROUGHING TRAINING IDLER 42-GC6312-01
CHICAGO PNEUMATICS 2100 AGER TOOL BALANCER, 45-60 lbs
AERO-MOTIVE 3.6-6.8 KG CAPACITY BALANCER, 15F-LR
GLEASON ECONOLINE TR2030AA RETRIEVER WHEEL, NNB
METTLER TOLEDO CHECK WEIGHING CONVEYOR MODEL 8142
CASCADE CORP. LIFT FORK ATTACHMENT PLATE 125D-RR
REXNORD TROUGHING TRAINING IDLER 36-GC6056-01
INGERSOLL-RAND ARO 550LB SERIES 7700 INDUST. ROLLER CHAIN HOIST, PART LABEL
REXNORD TROUGHING TRAINING IDLER 42-GC6310-01
BROWNING 26 TOOTH SPROCKET 060026
VITAX LEVOMAT 250KG CRANE LIFT AID VLK25-0334
REXNORD 60" CONVEYOR RETURN TRAINING IDLER BD-5052-13
KNAACK STORAGE CABINET JOBSITE CHEST JOBMASTER 68, BROKEN HINGES
REXNORD TROUGHING TRAINING IDLER 36-GC6200-02
7.5" OPEN HEAVY DUTY MACHINE VISE
REXNORD 15-LINK WIDE MILL SERIES CHAIN WD480
REXNORD TROUGHING TRAINING IDLER 42-GC6302-01
LYON METAL PRODUCTS 45 GAL. FLAMMABLE SAFETY CABINET CAT. NO. 5444, FADED
GARDNER DENVER COPPER MOTOR TOOL 921220
HERCULES INDUSTRIES DRUM HANDLING ATTACHMENT, PART LABEL
DODGE 30 X 40 CONVEYOR PULLEY HE 50 104965
VITAX LEVOMAT 250KG CRANE LIFT AID VLK25-0469
K & K WELDING PRODUCTS 300 Amp CABLE AND WELDING GUN
GREENLEE 3548 WORK BOX, 23.0 CUBIC FEET, 48" X 24" X 35"
FMC CONVEYOR ROLLER E4620-36 A37850 1732-269-A
CHICAGO PNEUMATICS 155-180LBS, SUPER DUTY BALANCER 2200 BPER
STORAGE CABINET, 36.5" X 18.5" X 72", NO LABEL
ERIEZ MAGNETICS 115V 54.9A SUSPENDED ELECTROMAGNETIC SEPARATOR MODEL SE 7435
INGERSOLL-RAND 150LBS @ 100PSI LIFTING AND BALANCING UNIT BW01508B00
CREFORM BOLT ON FIXED CASTER W/ 136 X 30 WHEEL, K-130
WHX 4885 RIV CHAIN, 12" PITCH, ROLLER 1.75" DIA. 3.25"W, PLATE 2.5"H, PIN 1.25"D
REXNORD TROUGHING TRAINING IDLER 42-GC6056-01
ADB 30,000lb NICKEL PLATED HOIST RING X83200-C-3.8-NI?CKEL *RUST*
INGERSOLL-RAND 150LBS @ 100PSI LIFTING AND BALANCING UNIT BW01508C
28' X 9" MEDIUM DUTY GENERAL PURPOSE CONVEYOR BELT B1200COS
MSI 50,000LBS. TRANS-WEIGH CRANE SCALE MSI 6260C D01
REXNORD WELDED FLAT TOP CONVEYOR CHAIN WHX 132 / WHXR 132R, 20-LINKS
CASTERS & EQUIP. CO. MED/HEAVY DUTY COLD FORGED WHEEL RUBBER/ POLYOLEFIN NNB
STANLEY 33"H, 30"W, 28"D VIDMAR SENTRY 100 STATIC PROOF CABINET
REXNORD TROUGHING TRAINING IDLER 36-GC6312-02
INGERSOLL-RAND 200LBS AT 90PSI LOAD POSITIONER, PART LABEL
INDUSTRIAL MAGNETICS INC. TRAMP METAL PLATE MAGNET EMD19A037
REXNORD TROUGHING TRAINING IDLER 42-GC6312-02
LOCTITE CORPORATION PUMP-A-BEAD II 850 ml DISPENSE SYSTEM 986000, PARTS/REPAIR
KNIGHT 100PSI 225LBS. AIR BALANCER MODEL KBA 225-073 99373
ROPER WHITNEY PEXTO 22 GA CAPACITY SLIP ROLL FORMER MODEL 381 D
CM COLUMBUS McKINNON 2-TON 8 F.P.M. 1HP ELECTRIC HOIST MODEL R, NO PENDANT
YALE 1 TON HOIST, PARTS/REPAIR
MOORE 110/120V 60HZ 4A PRESSURE SEALER MODEL 4100, PARTS/REPAIR
