GE IS200VCRCH1B
【ABB CI840 3BSE022457R1】由厦门仲鑫达科技有限公司 特价促销 【ABB CI840 3BSE022457R1】
PLC其实就是一套已经做好的单片机(单片机范围很广的喔)系统.
PLC的梯形图你可以理解成是与汇编等计算器语言一样是一种编程语言,只是使用范围不同!而且通常做法是由PLC软件把你的梯形图转换成C或汇编语言(由PLC所使用的CPU决定),然后利用汇编或C编译系统编译成机器码!PLC运行的只是几器码而已.梯形图只是让使用者更加容易使用而已.
同样MCS-51单片机当然也可以用于PLC制作,只是8位CPU在一些高级应用如:大量运算(包括浮点运算),嵌入式系统(现在UCOS也能移植到MCS-51)等,有些力不从心而已.我公司在使用的一套工业系统就是使用MCS-51单片机做的,不过加上DSP而已,已经能满足我们要求(我们设备速度较慢,而且逻辑控制为主,但是点数不少喔,128点I/O呢!!),而且同样使用梯形图编程,我们在把我们的梯形图转化为C51再利用KEIL的C51进行编译.你没有注意到不用型号的PLC会选用不同的CPU吗!!
当然也可以用单片机直接开发控制系统,但是对开发者要求相当高(不是一般水平可以胜任的),开发周期长,成本高(对于一些大型一点的体统你需要做实验,印刷电路板就需要一笔相当的费用,你可以说你用**器,用实验板来开发,但是我要告诉你,那样做你只是验证了硬件与软件的可行*,并不代表可以用在工业控制系统,因为工业控制系统对抗干扰的要求非常高,稳定**,而不是*能**,所以你的电路板设计必须不断实验,改进).当你解决了上述问题,你就发现你已经做了一台PLC了,当然如果需要别人能容易使用你还需要一套使用软件,这样你可以不需要把你的电路告诉别人(你也不可能告诉别人).
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------------------------〖联系人:苏烈格〗--------------------------------
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【厦门仲鑫达给您不一样的全新体验】
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因为价格,我损失了不少客户!
但是我还是坚持自己的原则:先保证质量再说价格!
如果产品质量和服务不够好?
仲鑫达备件专家不能解决你们的后顾之忧,那么即使再便宜也就是一锤子买卖!
商品有价,信任无价,保质保量是给每位客户的承诺!
廉价主导不了市场,品质才是客户*需要的。! ——致所有信赖我的客户
仲鑫达自动化-您身边的工业自动化备件专家,您的满意,我们的不断追求。
致力于为客户提供高质量的自动化配件,我们的团队拥有超过10年的行业销售经验,我们非常自豪地说, 你不会找到一个比我们在自动化领域更加专注的销售专员 我们在全球范围内提供各式各样的自动化的部件,了解更多自动化零部件知识-仲鑫达Automation销售专员给您提供MRO设备需求!
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OZAT 18MM SOCKET 6PT 3/4 IN DRIVE D537055
UNIVERSAL PM16MM4 16MM SOCKET 6PT 1/2 IN DRIVE D537053
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GREENLEE 438-10 40FT X 1/8IN STEEL FISH TAPE D573191
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CROSBY G-450 1010177 RED-U-BOLT CLIP 5/8 IN CLAMP D556538
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1-14 NS HEX PIPE RETHREADING DIE D594393
1-1/4-8 HEX PIPE RETHREADING DIE D594390
MORSE 1-8 NC HEX PIPE RETHREADING DIE D594391
WIDELL 669195 1-1/2-12 HSS HEX PIPE RETHREADING DIE D594369
9/16-12 UNC HS SPLIT ROUND DIE D542363
WIDELL 633285 HSS M20X2.5 DIE D542360
TAYLOR M31X3.5 HSS DIE D542355
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RIDGID 35815 1/8IN NPT PIPE TAP D590138
BERGMAN NO 102 SAFETY SPANNER WRENCH D567914
BERGMAN NO 100 SAFETY SPANNER WRENCH 8IN D567920
EL-MAC NO 10 SPANNER WRENCH 10IN D567929
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CS OSBORNE HOLE 15/16 IN PUNCH D561764
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KENNAmetaL 40512201025 3/8-24NF H3 3FLT SS SPI PT TAP D572106
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BERGMAN NO 102 SAFETY SPANNER WRENCH D592100
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