IC693APU305 亿佳秒发
根据已确定的用户 I/O 设备，统计所需的输入信号和输出信号的点数，选择合适的 PLC 类型，包括机型的选择、容量的选择、I/O 模块的选择、电源模块的选择等。
( 4 )分配 I/O 点
分配 PLC 的输入输出点，编制出输入 / 输出分配表或者画出输入 / 输出端子的接线图。接着九可以进行 PLC程序设计，同时可进行控制柜或操作台的设计和现场施工。
( 5 )设计应用系统梯形图程序
根据工作功能图表或状态流程图等设计出梯形图即编程。这一步是整个应用系统设计的zui核心工作，也是比较困难的一步，要设计好梯形图，首先要十分熟悉控制要求，同时还要有的电气设计的实践经验
西门子
西门子股份公司(SIEMENS AG FWB：SIE,NYSE：SI)是世界大西门子公司总部的机电类公司之一，1847年由维尔纳·冯·西门子建立。如今，它的国际总部位于德国慕尼黑。西门子股份公司是在法兰克福证券交易所和纽约证券交易所上市的公司。2005年，西门子全集团在190个国家和地区雇用员工460,800人，收入为754.45亿欧元(2004年为702.37亿欧元)，税后利润较2004年的36.6亿欧元降至24.2亿欧元。
各个PLC的编程语言的指令设计、界面设计都不一样，不存在孰优孰劣的问题，主要是风格不同
2PK - SUPERIOR A69 V-BELT, 1/2" x 71" O.D. - 4L710
3 1/2 × 1/4 Inch Superior Elasticity Rubber Band NaturalColor
3 1/2 × 1/4 Inch Superior Elasticity Rubber Band Natural Color-- 2 Pack
3 Dozen Flying Dutchman Superior Puzzle Flying Dutchman ScrollSaw Blades
3 Pair Superior Emerald CX SCXLX CutResistant Gloves, Size LARGE
3 Tubing Cutters Superior Tool Pro-Line General Plumping TubeSmall Cutting Tool
3" SHUR-KUT 36 GRIT QUICK CHANGE DISC A/O SUPERIOR ABRASIVE50/BOX PRICE REDUCED
3" X 1-1/4" Light Medium Duty Ridged Plate Poly-Pro 250 lbs.Durable Superior
3" X 1-1/4" Light Medium Duty Stem Caster Hard Rubber 275 lbs.Durable Superior
3" X 1-1/4" Light Medium Duty Swivel Plate Hard Rubber 275 lbs.Durable Superior
3" X 1-1/4" Light Medium Duty Swivel Plate Poly-pro 250 lbs.Durable Superior
3.5" X 1-1/4" Light Medium Duty Ridged Plate Poly-Pro 250 lbs.Durable Superior
3/4 NPT Taper Pipe HSS Tap 3/4 TPI Superior
3/4" - 14 NPT taper Pipe Die 3/4 - 14 Superior (1PCS)
3/8" - 28 HSS Right hand Thread Tap 3/8 - 28 TPI Superior (1pcs)
3/8-18 NPT pipe tap, High Carbon Steel, Brand , 3/8 pipe tap Superior
30Vdc @ 60A NPNP Thyristor # JAN2N1777AA Superior Mil-SpecVersion to the 2N1777
3L130 3/8" x 13" Outside length vbelt v-belt Superior tono name brands
3L140 3/8" x 14" Outside length vbelt v-belt Superior tono name brands
3L150 3/8" x 15" Outside length vbelt v-belt Superior tono name brands
3L160 3/8" x 16" Outside length vbelt v-belt Superior tono name brands
3L170 3/8" x 17" Outside length vbelt v-belt Superior tono name brands
3L180 3/8" x 18" Outside length vbelt v-belt Superior tono name brands
3L190 3/8" x 19" Outside length vbelt v-belt Superior tono name brands
3L200 3/8" x 20" Outside length vbelt v-belt Superior tono name brands
3L200 vbelt v belt 3/8" x 20" OD Kevlar Superior to noname products
3L210 3/8" x 21" Outside length vbelt v-belt Superior tono name brands
3L220 3/8" x 22" Outside length vbelt v-belt Superior tono name brands
3L220 vbelt v belt 3/8" x 22" OD Kevlar Superior to noname products
3L230 3/8" x 23" Outside length vbelt v-belt Superior tono name brands
3L240 3/8" x 24" Outside length vbelt v-belt Superior tono name brands
3L250 3/8" x 25" Outside length vbelt v-belt Superior tono name brands
3L250 vbelt v belt 3/8" x 25" OD Kevlar Superior to noname products
3L260 3/8" x 26" Outside length vbelt v-belt Superior tono name brands
3L260 vbelt v belt 3/8" x 26" OD Kevlar Superior to noname products
3L270 3/8" x 27" Outside length vbelt v-belt Superior tono name brands
3L270 v belt 3/8" x 27" OD Kevlar SUPERIOR TO NO NAMEPRODUCTS
3L280 3/8" x 28" Outside length vbelt v-belt Superior tono name brands
3L290 3/8" x 29" Outside length vbelt v-belt Superior tono name brands
3L290 vbelt v belt 3/8" x 29" OD Kevlar Superior to noname products
3L300 3/8" x 30" Outside length vbelt v-belt Superior tono name brands
3L310 3/8" x 31" Outside length vbelt v-belt Superior tono name brands
3L310 vbelt v belt 3/8" x 31" OD Kevlar Superior to noname products
3L315 3/8" x 31-1/2" Outside length v-belt Superior tono name brands
3L320 3/8" x 32" Outside length v-belt Superior to noname brands
3L330 vbelt v belt 3/8" x 33" OD Kevlar Superior to noname products
3L340 3/8" x 34" Outside length v-belt Superior to noname brands
3L350 3/8" x 35" Outside length vbelt v-belt Superior tono name brands
3L350 vbelt v belt 3/8" x 35" OD Kevlar Superior to noname products
3L370 3/8" x 37" Outside length v-belt Superior to noname brands
3L370 vbelt v belt 3/8" x 37" OD Kevlar Superior to noname products
3L380 3/8" x 38" Outside length v-belt Superior to noname brands
3L380 vbelt v belt 3/8" x 38" OD Kevlar Superior to noname products
3L390 3/8" x 39" Outside length v-belt Superior to noname brands
3L400 3/8" x 40" Outside length v-belt Superior to noname brands
3L400 vbelt v belt 3/8" x 40" OD Kevlar Superior to noname products
3L410 3/8" x 41" Outside length v-belt Superior to noname brands
3L410 vbelt v belt 3/8" x 41" OD Kevlar Superior to noname products
3L420 3/8" x 42" Outside length v-belt Superior to noname brands
3L420 vbelt v belt 3/8" x 42" OD Kevlar Superior to noname products
3L430 3/8" x 43" Outside length v-belt Superior to noname brands
3L430 vbelt v belt 3/8" x 43" OD Kevlar Superior to noname products
3L440 3/8" x 44" Outside length v-belt Superior to noname brands
3L440 vbelt v belt 3/8" x 44" OD Kevlar Superior to noname products
3L450 3/8" x 45" Outside length v-belt Superior to noname brands
3L450 vbelt v belt 3/8" x 45" OD Kevlar Superior to noname products
3L460 3/8" x 46" Outside length v-belt Superior to noname brands
3L460 vbelt v belt 3/8" x 46" OD Kevlar Superior to noname products
3L470 3/8" x 47" Outside length v-belt Superior to noname brands
3L470 vbelt v belt 3/8" x 47" OD Kevlar Superior to noname products
3L480 3/8" x 48" Outside length v-belt Superior to noname brands
3L480 vbelt v belt 3/8" x 48" OD Kevlar Superior to noname products
3L490 3/8" x 49" Outside length v-belt Superior to noname brands
3L490 vbelt v belt 3/8" x 49" OD Kevlar Superior to noname products
3L500 3/8" x 50" Outside length v-belt Superior to noname brands
3L500 vbelt v belt 3/8" x 50" OD Kevlar Superior to noname products
3L510 3/8" x 51" Outside length v-belt Superior to noname brands
3L510 vbelt v belt 3/8" x 51" OD Kevlar Superior to noname products
3L520 vbelt v belt 3/8" x 52" OD Kevlar Superior to noname products
3L530 3/8" x 53" Outside length v-belt Superior to noname brands
3L530 vbelt v belt 3/8" x 53" OD Kevlar Superior to noname products
3L540 3/8" x 54" Outside length v-belt Superior to noname brands
3L550 3/8" x 55" Outside length v-belt Superior to noname brands
3L550 vbelt v belt 3/8" x 55" OD Kevlar Superior to noname products
3L560 3/8" x 56" Outside length v-belt Superior to noname brands
3L580 3/8" x 58" Outside length v-belt Superior to noname brands
3L590 3/8" x 59" Outside length v-belt Superior to noname brands
3L600 3/8" x 60" Outside length v-belt Superior to n