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SB105/30/08/05/19/S/01/64/EOKN

时间:2018-10-9,阅读:213,发布企业:漳州鼎晟达自动化设备有限公司, 资讯类别:会员资讯
公司:
漳州鼎晟达自动化设备有限公司
联系人:
林朝艺
手机:
18105962758
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18105962758
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86-0596-3119658
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地址:
漳浦县金浦花园1-302
摘要:SCHELCT02 ELAU AG SB105/30/08/05/19/S/01/64/EOKN RQAUS1

问:西门子plc如 s7200 s7300  s7400 还有新出的s71200。请问各位高手在实际应用中选择这些plc的主要标准是什么?

答:      在PLC系统设计时,首先应确定控制方案,下一步工作就是PLC工程设计选型。工艺流程的特点和应用要求是设计选型的主要依据。PLC及有关设备应是集成的、标准的,按照易于与工业控制系统形成一个整体,易于扩充其功能的原则选型所选用PLC应是在相关工业领域有投运业绩、成熟可靠的系统,PLC的系统硬件、软件配置及功能应与装置规模和控制要求相适应。熟悉可编程序控制器、功能表图及有关的编程语言有利于缩短编程时间,因此,工程设计选型和估算时,应详细分析工艺过程的特点、控制要求,明确控制任务和范围确定所需的操作和动作,然后根据控制要求,估算输入输出点数、所需存储器容量、确定PLC的功能、外部设备特性等,最后选择有较高性能价格比的PLC和设计相应的控制系统。 
    一、输入输出(I/O)点数的估算 

    I/O点数估算时应考虑适当的余量,通常根据统计的输入输出点数,再增加10%~20%的可扩展余量后,作为输入输出点数估算数据。实际订货时,还需根据制造厂商PLC的产品特点,对输入输出点数进行圆整。 
    二、存储器容量的估算 

    存储器容量是可编程序控制器本身能提供的硬件存储单元大小,程序容量是存储器中用户应用项目使用的存储单元的大小,因此程序容量小于存储器容量。设计阶段,由于用户应用程序还未编制,因此,程序容量在设计阶段是未知的,需在程序调试之后才知道。为了设计选型时能对程序容量有一定估算,通常采用存储器容量的估算来替代。 

    存储器内存容量的估算没有固定的公式,许多文献资料中给出了不同公式,大体上都是按数字量I/O点数的10~15倍,加上模拟I/O点数的100倍,以此数为内存的总字数(16位为一个字),另外再按此数的25%考虑余量。 

诚信经营,质量为首,诚信至上,漳州鼎晟达自动化设备有限公司竭诚为您服务
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【本公司主营产品】
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2:GE FANUC(GE发那科):模块、Yaskawa(安川):伺服控制器、Bosch Rexroth(博世力士乐)Woodward(伍德沃德)英维斯(TRICONEX)
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TVB120RSA-LRAYCHEM

B31873-10ANIDEC / POWER GENERAL

74F251ASJFAIRCHILD

CY2292SXI-1X1CYPRESS

AS236-321SKYWORKS SOLUTIONS

SH1035/TR2.5PDUBILIER

SN74ABT16543DLTEXAS INSTRUMENTS

J2673SILICONIX

QLMP-LD97-PPTDDAVAGO TECHNOLOGIES

553-0222-204FDIALIGHT

MMSZ5221B-7DIODES INC.

PIC16C54-RC/PMICROCHIP

04026D105MAT2AKYOCERA

D8203-1INTEL

STGD14NC60KT4ST MICROELECTRONICS SEMI

EDE1116AEBG-8E-FELPIDA MEMORY INC.

MAX117EAI-TMAXIM

SN74LVC574ADBRTEXAS INSTRUMENTS

10MCS476MD2TERNIPPON (CHEMICON)

KA78L08ADTFFAIRCHILD

TM1S4-CPANDUIT

110-91-316-41-605000PRECI-DIP

MT58LC64K32B3LG-10MICRON TECHNOLOGY,INC

74AUP1G34GFNXP SEMICONDUCTORS

ABM7-14.7456MHZ-D2Y-TABRACON

AD9767ASTZRLANALOG DEVICES

HLMP-EG24-PS000-QAVAGO TECHNOLOGIES

LST670K2-1-0R18OSRAM OPTO

XC6401EE35MRTOREX SEMICONDUCTOR

HCF4040M013TRST MICROELECTRONICS SEMI

DPA422PNPOWER INTEGRATIONS

BT137500PHILIPS

HLMP-DL15HEWLETT PACKARD

74ACT534SJFAIRCHILD

BC846AWT1MOTOROLA

74LCXR2245MTCXFAIRCHILD

HSP43220VC-25HARRIS

RK73H2BLTD2743FKOA

KSP44TFFAIRCHILD

98424-G52-12ALFFCI ELECTRONICS

SMM0204-MS1256K8.1%BEVISHAY

ST485BNST MICROELECTRONICS SEMI

MMBT5551-NLFAIRCHILD

MIC2568-1BTSMICREL

ISL9203CRZ-TR5220INTERSIL

2T61-190-1110-AFFOXCONN ELECTRONICS

NLU2G06MUTCGON SEMICONDUCTOR

CRCW12061500F100RT5VISHAY

PCF8577CTPHILIPS

SK025M0010A2F-0511YAGEO

LM258DTST MICROELECTRONICS SEMI

MAX2682EUT+TMAXIM

63246-0050NFRAMATOME CONNECTORS

DS1743P-100DALLAS

LMH6550MAXNATIONAL SEMICONDUCTOR

TIBPAL16L8-15CFNTEXAS INSTRUMENTS

CEA470025DUBILIER

MC74HCT573ADWR2ON SEMICONDUCTOR

RS26.2K5%RSTACKPOLE ELECTRONICS INC.

IC63LV1024-15TINTEGRATED CIRCUIT SOLUTION

MC7805ABD2TON SEMICONDUCTOR

PTCLL05P101KTE052VISHAY

RK73H1ETTP4021FKOA

BCP56NXP SEMICONDUCTORS

SC4905AIMSTRSEMTECH

TC74HC273AF(EL,F)TOSHIBA

T491D107M010AS7454KEMET

TC74ACT32FNTOSHIBA

223-000312-20-LF-TROSCILENT CORPORATION

57102-G08-07FCI ELECTRONICS

74HC4051D-TNXP SEMICONDUCTORS

1N4004GPHILIPS

B81131C1684MEPCOS

2N3906RLRAMOTOROLA

MBR0530-TPMICRO COMMERCIAL COMPONENTS

TDSL1160TELEFUNKEN

LT1573CS8-2.5LINEAR TECHNOLOGY

 

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