RELIANCE ELECTRIC 0-57669-B

分类:
选择深圳长欣,选择放心,售后无忧
大量现货,当天顺丰发货!
了解产品更多详细信息或购买请拨打以下电话咨询:
白工微信
(加微信咨询)

联系人:白工

电话:18150087953 / 18005022138

Whatsapp/Wechat:+8618150087953 / +8618005022138

Email:sales@cxplcmro.com

描述

RELIANCE ELECTRIC 0-57669-B

价格仅是选择PLC品牌的一个因素,而可靠性是选择时需要考虑的又一个因素。 (2)从设计、生产周期长短考虑 不论是老设备改造,还是设计新的生产机械设备,毫无疑问,生产、设计周期越短越好,甚至希望边设计、边安装、边调试和边生产,特别是产品更新换代,生产工艺改造,不需改动现有生产设备及其外部接线,就能马上组织生产,这不仅节约了劳动力,而且新产品能尽快投入市场。这无疑给企业增加了活力,提高了经济效益。如果把这些要求得以实现,继电器或半导体都不能满足,而PLC则完全可以实现。这是因为若用PLC不必改动外部设备接线,只要在软件上作文章就可以了。也就是说只要改变梯形图,按照新工艺要求重新输入新程序或修改原程序即可。这既经济又简捷,可以达到事半功倍的目的。
众所周知,目前我国75%的生产机械设备,都是采用继电器控制,除了可靠性差外,设计程序也很繁杂。从方案的确立到技术条件的设计以及施工的设计,图面的工作量很大,这势必造成设计周期长。而采用PLC控制可以大大缩短设计周期,甚至有些文件资料也不必绘制成图。设计人员完全可以利用编程器上屏幕显示来输入,或修改程序使得梯形图能准确无误地反映生产要求。编程人员也可根据新产品对生产提出的新工艺要求,重新编写程序并把它存储在EEPROM模块中去,需要加工哪个产品的程序,操作人员可以随时调用,这既方便、简单又可保密。开发这种软件对优化生产过程,提高产品数量和质量,提高劳动生产率,非常具有实际意义。仅此一点也深受生产及设计者的欢迎。 六、PLC最新发展状态及趋势 现代PLC的发展有两个主要趋势:其一是向体积更小、速度更快、功能更强和价格更低的微小型方面发展;其二是向大型网络化、高可靠性、好的兼容性和多功能方面发展。 (1)大型网络化 主要是朝DCS方向发展,使其具有DCS系统的一些功能。网络化和通信能力强是PLC发展的一个重要方面,向下可将多个PLC、I/O框架相连;向上与工业计算机、以太网、MAP网等相连构成整个工厂的自动化控制系统。 (2)多功能 随着自调整、步进电机控制、位置控制、伺服控制等模块的出现,使PLC控制领域更加宽广。

产品承诺:
保 证 全新原装进口,
保 证 安全准时发货,
保 证售后服务质量,
优势价格,大量现货。

主营DCS系统配件
机器人系统配件
大型伺服系统配件
品牌:ABB   ,AB  ,GE,FOXBORO,本特利,英维思,伍德沃德,西屋,瑞恩,施耐德,西门子,摩托罗拉,安川。力士乐。ACSO,横河等进口品牌。 专业销售进口DCS  PLC系统备件模块
Triconex Siemens Yaskawa ABB GE Ovation AB Foxboro Motorola Schneider XYCOM KUKA
  专业销售进口DCS  PLC系统备件模块 15天包退换 一年质保 大量现货  国内实力库存商家

Globe Alum-5000 Auto Load Unload Robot

Corning 4SME Flat Optical Cable Drop 38000 ft

KEITHLY DDA-08/16 PC9172 14286 REV3 CARD

KEITHLY DAS-1801ST-DA CARD

PCC DISTRIBUTION PCCAP 9801-0046 BOARD

ADC SE-5562MT-072 PUREBAND OFNR OPTICAL CABLE 415FT

BLUE M BM7000 PROCESS CONTROL

ARO 3860-2003-1-160 PNEUMATIC CYLINDER

ENCORP GPC 003-51 REV A BOARD

BENTLY NEVADA 3300/05 SYSTEM POWER SUPPLY RACK

ECONO LIFT TR20 PORTABLE BOX TILTER

HAYWARD STI02094 VALVE

EM Electronic Measurements TCR20T250-1 Power Supply

15 GOULD ITE UNIVERSAL LIGHTING DUCT TPG312-3S

LIFT-RITE L50 PALLET JACK 5000LBS 42” WIDE

350 ASYST TECHNOLOGIES 6002TD000200 DUAL GEAR ADJUSTER

Solomat MPM 2000 Modumeter

AUTONETICS T/E CHAMBER HEAT FURNACE

PULIZZI PC726-D-2482 POWER DISTRIBUTION UNIT

BRANSON 222-100-016 REV122 LASER MODULE INTERFACE

SIEMENS FXD63B250 ITE CIRCUIT BREAKER

HONEYWELL R7248A1004 INFARED AMPLIFIER

REX EC4434 P80226 STEEL WELDED CHAIN

5000 CONCORD ELECTRONICS 10-916-3-03 P.C. GOLD PIN .04

Syntron EB-192-A Magnetic Parts Feeder Bowl 21”

BENTLY NEVADA 3300/20 DUAL THRUST MONITOR

Com-ten 922 MT-20 Force System

6 HEAVY DUTY INDUSTRIAL HUB BEARINGS

LOCTITE 97006 Precision Syringe Dispenser

BENCHMASTER 182A-2 ROTARY DIE PRESS

Socapel Socasin BA4 30-50-310 Digital Motion Controlle

Socapel Socasin AC-Servo ST1 10-310 Digital Motion Con

Socapel Socasin AC-Servo ST1 10-310 Digital Motion Co

S/200/60794 Polyester Film MYLAR

Ok Industries MTR-2001 Mixed Technology Rework

NELES-JAMESBURY 815L-11-2236-MT WAFER-SPHERE VALVE

3 ASTRO-MED MT9500 CHART RECORDER

ANGST+PFISTER 4AL-0500-30-0/P​RS

ANGST+PFISTER 3AL-0160-30-0/P​RS

9 CUTLER-HAMMER 5CLPT-2E FUSE

11 OMRON K2CU-F20A-E HEATER FAULT DETECTOR

BENTLY NEVADA 3300/55 DUAL VELOCITY MONITOR

LEEDS & NORTHRUP 063206 DIGITAL MULTIPOINT RECORDER

WHITE RODGERS 25M43S SOLENOID GAS VALVE

Cleaver Brooks DP Pumping Tank for Boiler

3100 WIRE TERMINALS

4 ZEBRA 105SE LABEL PRINTER

DYNAPERT USV-860N38-1 REVF VERIFIER BOARD

BOND ADHESIVE DISPENSING MACHINE

ASHUN PNEUMATIC TABLETOP PRESS 9.2 Ton/SqFt

NIPPON TANSHI ACM-11A CRIMPING UNIT 1.5TON

NIPPON TANSHI ACM-11A CRIMPING MACHINE 1.5TON

PCB SAW CUTTING MACHINE

PCB EDGE SAW CUTTING MACHINE

BASLER SR4A2B03A3E STATIC VOLTAGE REGULATOR

BARCO 5100 PHU Projector

NORDSON 296415A DISPENSING CONTROL STATION

Wild Heerbrugg Makrozoom 1:5 lense

Fine Sodick BENT-01 B0220 Board P.C.4181295

ROSS Engineering E100-NC-100-2-0 High Voltage Contacto

Performance Feeders 24-C Vibratory Bowl 24”

Acterna MMS-4305 AMPS/ PCS/ TDMA Mobile Service Test

AGILENT 79916AP-574 APS HYPERSIL HPLC CARTRIDGE

AGILENT 79923OP-584 ODP-50 ASAHIPAK HPLC CARTRIDGE

1100 Corner Post Heavy Duty Edge Protectors 3x3x44″

EBARA RAD015-95018 REV3 CONTROL BOARD

SIEMENS FXD63B225 ITE CIRCUIT BREAKER

FOXBORO P0400QL DUAL FLOPPY DRIVE

79250504BVV CIRCUIT BOARD

ADEPT EXC CONTROLLER

MODICON 140-CPU-113-03 CONTROLLER

11 802587 RUBBER SWEEPER ATTACHMENT 58”

KEPCO RA-22-6 PBX40-0.5MAT DC POWER SUPPLY

AM FAN 73-00026170 FAN HOUSING

KEPCO RA-22-6/ PBX40-0.5MAT DC POWER SUPPLY

FOXBORO 136-4-3 STB COMPUTING RELAY

73-00027430 SHAFT

KEPCO PBX40-0.5MAT DC POWER SUPPLY

Yachiyo YK-20 Bowl & Linear Feeder 12″ W/ Controls

Intergraph MDSP05608 15 IMACLR Monitor

5/8” CORRUGATED PLASTIC TUBING CABLE ORGANIZER 7000′

Brookfield RUF Viscometer

ESI 262 DB62 Resistance Comparator and Decade

WESTINGHOUSE 9966D84G01 REV28B POWER SUPPLY BOARD

36 POWERSTAT 10C VARIABLE AUTOTRANSFORMER

Exabyte 17D DLT 7000DIFF Library Hard Drive

CUTLER-HAMMER IQMESIIN1 IQ MULTIPOINT ENERGY SUBMETER

117 OMRON SRT2-VID08S REMOTE TERMINALS

110 OMRON SRT2-VOD08S REMOTE TERMINALS

7 METCAL 17829 DS1 DESOLDER TOOL

FOX BORO 8003A MAGNETIC FLOW TUBE

Cutler-Hammer PRL3a POW-R-LINE Panel Board

WESTINGHOUSE NLPL780 CRT PROGRAM LOADER

AGILENT 990967-902 ECLIPSE XDB-C18 HPLC COLUMN

SQUARE D 8502 SEO2V03 CONTACTOR 25HP

MITSUBISHI 7000 SERIES UPS 2KVA/1.4KW

PCB CUTTING MACHINE SAW

PCB CUTTING MACHINE SLICER

7 BRADY 200M 300X-PLUS LABEL PRINTER

FUJI PGM1AY01-3Y1SY DIGITAL PLOTTER

YOKOGAWA UR100 CHART RECORDER

Carl Zeiss Jena 250997 Diagnostic Microscope

Yaskawa SGDA-08AP Servo Pack

FANUC AD-H 201 Board AD-H201

FANUC A16B-1700-0130/​028 Controller

HONEYWELL 4253401 RESOLVER

SIEMENS S7-200 MICRO PLC

SQUARE D 7TQ4023R2 TRANSFORMER 7.5KVA

ADEPT 90400-02700 EXTB01AD TEACH PENDANT

KEPCO ATE36-8M DC POWER SUPPLY

Teledyne HBM-1A Hasting Flowmeter

NTN NAC K16 A93-2469 Bowl Feeder 10″ with Speed Control

NTN S10/K16 Line & Bowl Feeders 9”

SPOOL WINDING MACHINE

137 GRINNELL FIG 772 RIGID FIRE COUPLING 1.25”

STEEL MELTING POT MINING SMELTER

29 Boxes Uline S-6318 Poly Bags 24 x 24″ 1 Mil

HP 423A Coaxial Crystal Detector

TEKTRONIX TDS340A 2 CH DIGITAL REAL-TIME OSCILLOSCOPE

Coherent CR-12 HD CR-18 Supergraphite Ion Laser

AMERICAN INDUSTRIAL TRANSFER UCS-614 HEAT EXCHANGERS

CONTROL TECHNIQUES 2400 ADJUSTABLE VOLTAGE DC DRIVE

KRAS PUNCH PRESS

YUSHIN AN-3500 CONTROL PANEL

UNITORQ M103K4 ACCORD1000 VALVE POSITIONER CONTROL

INGERSOLL-RAND 9639A60G01 IR COMPRESSOR CONTROL

FAIRCHILD SEMICONDUCTOR TFXPD 6000 PNEUMATIC TRANSDUCER

INSUL 8 DQC33B-7 POWEREEL

3600 ARM & HAMMER VACUUM BAGS ORECK XL WHOLESALE LOT

2 Yushin HOPII-A750 Plastic Process Robot Arms

Yachiyo Kohken YK-20 Bowl Feeder 12″ & Linear Feeder

35 Mercury 32-858108K12 Fuel Line Assembly 8Ft

3600 Arm & Hammer SANITAIRE SD632262 VACUUM BAGS LOT

KOLLMORGEN M-103-A-34 GOLDLINE PM SERVO MOTOR

Automation Robotic Assembly Table Stand ATS

CLA-VAL 3-136-01A SOLENOID CONTROL VALVE

Bell & Howell Phillipsburg CF-4 Insertion Direct Mail

Kollmorgen PSR4/5A-212 Industrial Drives

HP AGILENT 54600A 100MHz 2 CH OSCILLOSCOPE

TEKTRONIX TDS340 2 CH DIGITAL REAL-TIME OSCILLOSCOPE

33 ROCKWELL TEST BLOCK SET

MITEL SX2000FD 9400-200-110-NA PHERIPHERAL NODE

Noyes OPM 5-2 Optical Power Meter

Injection Molding Head Injector cylinder

FANUC 68E2 119 739 Board

ALLEN-BRADLEY 1785-L30B/E ENHANCED PLC-5 CONTROLLER

Omron Sysmac C200HG PLC W/ MODULES

DRI-AIR INDUSTRIES 83150-C Electric Dryer Valve

20 White Rodgers 1609-101 Refrigeration Temp Controls

Hermes Vanguard II Engraving Machine

2 DOMINION POWER PRESS SPECTRA TRANSMITTER/REC​EIVER

MILLER DELTAWELD 300 DC WELDING POWER SOURCE

9 PAK-X-TRAC PXT-44A Desoldering & Extraction Tool

STEEL BELT CONVEYOR 120X38”

8 ATI 102-B38201 (B) VIDEO CARD

AB ALLEN-BRADLEY SLC500 10 SLOT PLC

2 P&H CONTROL HARNISCHFEGER 79U8D5 FREQUENCY DETECTOR

92 STINGER B4040/0809 LIGHT BULB

CROUSE-HINDS M9A INDUSTRIAL RECEPTACLE OUTLET

DRESSER 175 10N PASS VALVE

WATTS 2193-3 VALVE GLOBE ACV

8 Stanley 6ft Gold Series 120 Steel Framed Bypass Door

CONAIR TEMPRO MicroTRAC 23 Operator Panel Rev A Board

HAKKO 486 AIR CONTROL

2 Unloading Conveyor Gravity

FOXBORO 124-FE CONSOTROL AND SCANFOLD

SCHERR TUMICO 50-0135-07 DIAL BORE GAUGE

MARKEL AR500 .100X.124 Brown Flextech Liner 5400FT

COMPUTYPE GANTRY 12X32”

4 NNTM61008U2G AMPLIFIER

FOXBORO ICT AE003UZ BOARD

53 GRINNELL FIG 772 Rigid Coupling 1.5”

10 CENTRAL GRINNELL FIG 730 MECHANICAL TEE 2.5”

10 GRINNELL FIG 730 MECHANICAL TEE 3”/88.9MM

DALSA CL-E2-2048A-STD​M Industrial Camera Advisor

Fluke 515A Portable Calibrator

BECKER VTC6/2 D71A4P VACUUM PUMP

BECKER VTC672-09 D71A4P VACUUM PUMP

KENWOOD PW18-2 REGULATED DC POWER SUPPLY

KENWOOD PW36-1 REGULATED DC POWER SUPPLY

2 AGILENT HP 6030A SYSTEM POWER SUPPLY

TABLE-TOP PCB PNEMATIC PRESS

PCB PNEMATIC PRESS

MOORE 74G VALVE FLOW CONTROL SYSTEM

GE JVM-3 643X POTENTIAL TRANSFORMER

FOREMOST PEF-II PELLET FEEDER

ADEPT 90400 XY-HRS AD ACTUATOR

METRIC METAL WORK GAS METER IC-1260

EVERETT CHARLES 4450122-003 CIRCUIT BOARD TESTER

180 AVC F9025S12H 12V DC Fan

Lenze 33.8201-E Drive

Kahnetics Weller KDS834A Dispensing Systems

373 Wesbar Tail Lights Trailer Connectors Lot

2 Robo Cylinder IAI RCP-C-RSA-A Cylinder Controller RS

Fluke 335A DC Voltage Standard Differential Voltmeter

30 Skid Wire Decks 45×52”

10 AVX CZ MK1 Roller Coaster Small Parts Conveyor Scre

Bently Nevada 124534-01 Custom Proximitor

Koyo Direct Logic 205 PLC

3000 EFD 5115-B Dispensing Tips

ARRA N1164-20 Type N Attenuator

SICK CLV410-1010 Barcode Reader Sensor Scanner

2 Wayne Kerr Power Amplifier PAU3211A

HEPCO 7700-LF6A Leader Former

HEPCO 7900-LFA Lead Former

2 NEAT 310 Programmable Stepping Motor Controller

Exabyte 17D DLT 7000SE Library Hard Drive

6 Panduit Ped Dispenser Cable Tie

BERB XW-15 Cylindrical Roller Bearing

Custom Heated Thermal Press

Automatic Screwdriver

Custom Heated Thermal Press

Custom Heated Thermal Press

Tactical Controls Limited 310 Temperature Controller

Pneumatic Press 1/2” STROKE

Dri-Air CLL Air Dryer

CUTLER-HAMMER N04NDS2X3N CONTACT BLOCK

CHEMI-CON 1208R Electrolitic Capacitor Spool

EBARA RAD015-95083 REV3 CONTROL BOARD

SUPER SAHARA 2220 RUBBER CONVEYOR BELT 29”X24′

VULCAN P1640C FLAMELESS GAS INFRARED CATALYTIC HEATER

GAS MASK LOT

4700 PUSH BUTTONS SP ST 185110

MODICON PC0085 PE0001 PLC 4 SLOT

3/4” CORRUGATED PLASTIC TUBING CABLE ORGANIZER 3000′

SYMBOL MSI 1540 CONTROL

DUKANE 1000 AUTO-TRAC

UEHLING INSTRUMENTS 66851 55M LIQUID LEVEL GAUGE

6 TENDAMATIC H35056 AD477-X-2 REV1 CIRCUIT BOARD

CROUSE-HINDS N5R6352 M89 BREAKER BOX

BRISTOL BABCOCK 2007-30D POWER SUPPLY

GE 12SFF11A11A STATIC FREQUENCY RELAY

FOXBORO P0400UP CMP10 COMMUNICATIONS PROCESSOR 10

FOXBORO P0700WB NBE NOBE BUS EXTENDER

GE TS-6631 170M57D7 CRANE CONTACTOR

FOXBORO F6501A-A CONVERTER

FIKE903 617016-01 MODULE

FIKE903 9182.434 MODULE

ROSEMOUNT 623785 MICROPROCESSOR BOARD

POWER CIRCUITS FSC4C CONTROLLER

FOXBORO 873 PH/ORP ANALYZER

FOXBORO 7925050IC MODULE

FOXBORO I/A P0901VK 80MB HARD DRIVE AP20 S/W

FOXBORO I/A P0400ZG NODE BUS INTERFACE (NBI)

FOXBORO I/A P0901VK 80MB HARD DRIVE W/ AP20

FOXBORO I/A P0400VT AP20 APPLICATIONS PROCESSOR 20

FOXBORO I/A P0400QK PER TAPE W/CONT

FOXBORO F6501A-A RS485-RS232 Converter

FOXBORO CM400YR-0C I/A SERIES

FOXBORO DM400YP-0A I/A SERIES

ABB SOLID STATE TRIP TYPE SS SS5G

ADEPT 90400-10050/HY-​HRS ACTUATOR

PANASONIC MFA024LA2NS AC SERVO MOTOR

PANASONIC MFA024LA2NS AC SERVO MOTOR

AB ALLEN-BRADLEY SLC150 1745-LP153 PROCESSOR UNIT

MODICON AS-B872-200 OUTPUT MODULE ANALOG

3 P&H HARNISCHFEGER 79U6D4 BIAS MODULE

3 P&H HARNISCHFEGER 79U79 STABILITY MODULE

3 P&H HARNISCHFEGER 79U5D2 MAG AMP FIRING CONTROL

MICRO AIR SCA808NLM EXTRACTOR SOURCE CAPTURE ARM

ECONO LIFT TR20 TOTE BOX TILTER PORTABLE

FOXBORO 136-1 COMPUTING RELAY

INSUL 8 EQC33B-7 POWEREEL

MOHELLER M4248 KNIFE HOUSING

MOHEAER M4938 BEARING SUPPORT

BARRETT 100-2 REFRACTORY ANCHOR

ELGIN 15829-001 REV A DC POWER SUPPLY

Hewlett Packard 6459A Analog Power Supply

CAL-Power M-6175 DC Power Supply

IPITEK RPR-CH Reserve Optical

IPITEK RPR-AUX 24 Auxiliary Power Supply

National Instruments VXI-TB-196

Modicon PC-0984-485 Programmable Controller

INTERGRAPH 517526-9030 BOARD

27 Mercury 32-858103Q12 Fuel Line Assembly 12Ft

20 Mercury 32-858103K12 Fuel Line Assembly 12Ft

EG&G MTE-2110-706FE FIELD DC SERVO MOTOR

1200 DURABELT DIRT DEVIL 67022 VACUUM BELTS 22”

HP AGILENT E2251A VXI MODULE

TEKTRONIX VX4287 A/D INPUT MODULE

29 110-2354 REVD BOARD

NAS-497E F3N3K0057-C3 BOARD

NAS-466B F3N3K0017-B3 TW4D-0017A BOARD

CARL ZEISS 517526-9001 CHASSIS

HELLERMANN TYTON AUTOTOOL 2000 CABLE TIE TOOL

3/4” CORRUGATED PLASTIC TUBING CABLE ORGANIZER 2500′

5/8” CORRUGATED PLASTIC TUBING CABLE ORGANIZER 3500′

PROLOG PL 7874A 0787874G BOARD

LEXEL IMAGING 81736-02 CRT PROJECTOR

THOMAS ELECTRONICS 9M261P53 CRT PROJECTOR

Rotating Table Feeder Bowl 35″ diameter

American Hydro-Surgical StreamLine Hydro-Dissectio​n Pu

HP E1458A HP 75000 Series C 96-Channel Digital I/O

ULTRAK KEGS5000 SYSTEM CONTROLLER

ELECTRONIC MEASUREMENTS TCR 20T500-1 DC POWER SUPPLY

2350 EFD 5125-B DISPENSING TIPS

SCHERR TUMICO 50-0135-05 DIAL BORE GAUGE

SNAP-ON 5W4235RDGY5 AIR HOSE 750FT 3/16” 800PSI

LEXEL IMAGING 9L4047P53 CRT PROJECTOR

TECHRON 7560 POWER SUPPLY AMPLIFIER

WHITE RODGERS 36G24-510 MANIFOLD GAS VALVE

FUSION UV SYSTEM P150 POWER SUPPLY

36 Broadcom Mic BCM92045NMD Bluetooth card

90 AVC F9025S12H 12V DC Fan 92mm

Centent CNO162 High Resolution Microstep Drive

LEWIS SHEPARD Compact Pallet Jack 2000 lbs

FANUC 68E3.179889 TMC 3 Board

FANUC M-PLS I/F 68E3 15799 Board

FANUC 68E2.120210 Board

FANUC 68E2.119907 Board

专业销售进口DCS  PLC系统备件模块

PLC模块,可编程控制器,CPU模块,IO模块,AI模块,通讯模块。AB/施耐德/ABB/GE/本特利/西屋/英维斯/霍尼韦尔/黑马/FU克斯波罗

15天包退换 一年质保 大量现货  国内实力库存商家


选择深圳长欣,选择放心,售后无忧大量现货,当天顺丰发货!
主营:本特利,英维思,伍德沃德,福克斯波罗、西屋、瑞恩、施耐德莫迪康、ABB、AB、西门子、摩托罗拉、GE发那科、安川、博世力士乐,ACSO,力士乐等各大品牌的DCS系统配件,机器人系统配件,大型伺服系统备件。

先介绍几点经验。
1、先通读一遍“系统手册”(不管能不能看懂,先了解个大概,以便学习编程时查找);
2、由位控逻辑入手,逐渐增加定时、计数等条件,把或、与、非关系理顺;
3、进而练习整数运算、实数运算、类型转换;
4、量程转换、PID调节回路的建立及P、I、D参数的理解(最好是有个物理回路验证,比如变频器+电机+测速传感器);
5、循环、顺序、跳转等程序控制(尽量避免跳转,非跳不可时也是跳的越近越好);
6、中断、通讯、位置控制....

本人以ABB工业机器人配件DSQC系列和Motorola MVME系列,GE 卡件 模块 驱动器系列为主攻。各位电工朋友可根据自己的条件选择适合自己的PLC品牌,由于PLC的基本框架大同小异,学会一种至于其它的学习起来也就简单了。