描述
以上简单说明了PLC的工作原理,下面我们再以实例说明为什么编写梯形图程序,不宜重复使用线圈。如下图所示,设输入采样时,输入映象区中X001=ON,X002=OFF,Y003-ON,Y004=ON被实际写入到输出映象区。但继续往下执行时,因X002=OFF,使Y003=OFF,这个后入为的结果又被写入输出映象区,改变原Y003的状态。所以在输出刷新阶段,实际外部输出Y003=OFF,Y004=ON。许多新手就碰到过这样的问题,为什么X001已经闭合了,而Y003没有输出呢?逻辑关系不对。其实就是因为双线圈使用造成的。
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主营:世界知名品牌的PLC、DCS系统备件模块
①Allen-Bradley(美国AB)系列产品》
②Schneider(施耐德电气)系列产品》
③General electric(通用电气)系列产品》
④Westinghouse(美国西屋)系列产品》
⑤SIEMENS(西门子系列产品)》
⑥销售ABB Robots.FANUC Robots、YASKAWA Robots、KUKA Robots、Mitsubishi Robots、OTC Robots、PanasonicRobots、MOTOMAN Robots。
⑦estinghouse(西屋):OVATION系统、WDPF系统、MAX1000系统备件。
⑧Invensys Foxboro(福克斯波罗):I/A Series系统,FBM(现场输入/输出模块)
顺序控制、梯形逻辑控制、事故追忆处理、数模转换、输入/输出信号处理、数
据通信及处理等。Invensys Triconex:冗余容错控制系统、基于三重模件冗余(TMR)
结构的zui现代化的容错控制器。
⑨Siemens(西门子):Siemens MOORE,Siemens Simatic C1,Siemens数控系统等。
⑩Bosch Rexroth(博世力士乐):Indramat,I/O模块,PLC控制器,驱动模块等。
◆Motorola(摩托罗拉):MVME 162、MVME 167、MVME1772、MVME177等系列。
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R902077193 DRIVE SHAFT WITH BEARING ASSY BOSCH REXROTH
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A10VS010DRG/52R-PKC64N00E BOSCH REXROTH
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REXROTH PRESSURE COMPENSATED PUMP
Rexroth PPC CONTROLLER W/ETHERNET UP TO 40 AXIS
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Expedited shipping available
MANNESMANN REXROTH A2V-SL1000HS 0R5 GP PUMP,USED
Rexroth Hydraulic Motor AA2FM32/61W-VSD540
Rexroth board CSB01.1C-SE-ENS-NNN-L1-S-NN-FW NEW
USED Mannesmann Rexroth VT-HNC100-1-13/134 HNC100
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Rexroth Prop Amplifier 11110066 VT3013 S36 R5 VT3000S3X
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REXROTH DIRECTIONAL CONTROL VALVE PT94515-1616 1-1/4″
Rexroth 4MC16 0 608 820 103 EC Tightening Spindle
NEW BOSCH REXROTH LTE 45 SERVO AMPLIFIER SAVE THOUSANDS
Rexroth EC304 0 608 701 018 EC Motor Tightening Spindle
Rexroth Indramat MTS-R01.2-M2-B1.FW#10952
Rexroth 4WREE Proportional Directional Valves Hydraulic
Rexroth Indramat DKC11.3-040-7-FW DKC11.30407FW Servo
Rexroth Indramat Servo Drive Controller TDM3020300W0
Rexroth Proportional Valve 4WRE 6 W08-12/24K4/M New
Rexroth LTE 45 Servo Amplifier LTE-45
One-day shipping available
Rexroth Servo Motor MSK050C-0300-NN-M1-UGO-NNNN new/box
Rexroth EHST-3-FVF-40 Prop Pressure Control Valve Reb.
Rexroth Brushless Permanent Magnet Motor Pt#1070076709
REXROTH 0-608-820-102 USPP 0608820102
REXROTH 0-608-820-070 USPP 0608820070
REXROTH 0-608-701-017 NSFP 0608701017
REXROTH R900568613 HYDRAULIC PUMP
REXROTH 8107199569 NSPP 8107199569
REXROTH Hydraulic Pump Power Unit 5 HP#6224SO4LR2
NEW Rexroth MKD071B-035-KG0-KN MKD071B035KG0KN Motor
One-day shipping available
New Rexroth Indramat MHD093B Servomotor
(3057-fc)Rexroth Hydraulic Pump Unit
BOSCH REXROTH TOUCHSCREEN DISPLAY SD301 0608830194 NEW
REXROTH,HDD02.2-WO40N,A/C CONTROLLER
MINT Indramat Rexroth RD52.1-4N-001-L-NN RD5214N001LNN
One-day shipping available
Rexroth Variable Displacment 45cc Hydraulic Motor A10VM
One-day shipping available
REXROTH LINEAR BEARING CARTRIDGES,P/N:R165341410
◥◣REXROTH INDRAMAT MAGNET MOTOR MKD025B-144-GG0-KN◢◤
Expedited shipping available
HUGE LOT REXROTH HYDRAULIC DIRECTIONAL VALVES
Rexroth Indramat AC Servo Power supply TVM24050220 15 A
REXROTH FE25C20/LN9M USPP FE25C20LN9M
INDRAMAT REXROTH DAE1.1 DAE11 I/O CARD**XLNT**
REXROTH VT1600S3X1EES43A81845 USPP VT1600S3X1EES43A
REXROTH R416001186 NSPP R416001186
Rexroth Servo ECO Drive DKC06.3-040-FW
Rexroth#MNR:R900583910 Replaces Cannon#32-40-042
Bosch Rexroth Mill Type Cylinder R407999226
2139 Rexroth 1PV2V4 Variable Vane Hydraulic Pump