描述
梯形图与助记符的对应关系:助记符指令与梯形图指令有严格的对应关系,而梯形图的连线又可把指令的顺序予以体现。一般讲,其顺序为:先输入,后输出(含其他处理);先上,后下;先左,后右。有了梯形图就可将其翻译成助记符程序。上图的助记符程序为:
地址指令变量
0000 LD X000
0001 OR X010
0002 AND NOT X001
p;0003 OUT Y000
0004 END
反之根据助记符,也可画出与其对应的梯形图。
梯形图与电气原理图的关系:如果仅考虑逻辑控制,梯形图与电气原理图也可建立起一定的对应关系。如梯形图的输出(OUT)指令,对应于继电器的线圈,而输入指令(如LD,AND,OR)对应于接点,互锁指令(IL、ILC)可看成总开关,等等。这样,原有的继电控制逻辑,经转换即可变成梯形图,再进一步转换,即可变成语句表程序。
欧美品牌停产的,常用的“PLC”备品备件
我司产品应用于以下领域:
1,《发电厂DCS监控系统》
2,《智能平钢化炉系统制造》
3,《PLC可编程输送控制系统》
4,《DCS集散控制系统》
5,《智能型消防供水控制系统》
6,《化工厂药液恒流量计算机控制系统》
7,《电气控制系统》造纸,印染生产线,变电站综合自动化控制系列
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。
Woodward 5461-651 Analog Input-8 Channel 4-20 mA
Woodward 5461-652 CURRENT INPUT
Woodward 5461-653
Woodward 5461-654 8 Ch RTD/input
Woodward 5461-655
Woodward 5461-656
Woodward 5461-659 DISCREET MODULE
Woodward 5461-661 Current Output Isolated-507(8 Channel)
Woodward 5461-768 Speed Control
Woodward 5461-769 Speed Reference
Woodward 5461-770 Speed Control
Woodward 5461-771 Speed Reference
Woodward 5461-772 Temp Control
Woodward 5461-773 SW Mode
Woodward 5461-774 Freq.Control
Woodward 5461-775 Amb.Bias Ramp
Woodward 5461-776 Accel.Schedule
Woodward 5461-777 Decel.Jump Rate
Woodward 5461-778 Liq.Final Driver
Woodward 5461-779 Fuel Transfer Card/Board
Woodward 5461-780 Gas Final Driver
Woodward 5461-781 Synchonizer
Woodward 5461-798 N1 Speed Control
Woodward 5461-880 RTD
Woodward 5461-892
Woodward 5461-944 Speed Control
Woodward 5461-975 Power Supply DCS 2 LV
Woodward 5461-975 Power Supply DCS 2 LV
Woodward 5462-017 DCS DIGITAL SPD SENSOR
Woodward 5462-085 FINAL DRIVER
Woodward 5462-117 POS TRANSDUCER
Woodward 5462-236
Woodward 5462-244 Liq.Final Driver
Woodward 5462-268 Mother Board for 505
Woodward 5462-292 Speed Sensor
Woodward 5462-336 Speed SENSOR
Woodward 5462-338 Power Aux Card
Woodward 5462-443 Fuel Transfer Card/Board
Woodward 5462-472
Woodward 5462-482
Woodward 5462-518 Speed SENSOR
Woodward 5462-519 Speed Control
Woodward 5462-520 Speed Reference
Woodward 5462-521 Power Sensor
Woodward 5462-522 Power Control
Woodward 5462-523 Power Refernce
Woodward 5462-524 Extraction Control
Woodward 5462-525 Pressure Prefernce
Woodward 5462-526 Ratio Limiter
Woodward 5462-527 Valve Ramp
Woodward 5462-528 Final Driver
Woodward 5462-529 Valve Ramp
Woodward 5462-530 Final Driver
Woodward 5462-531 Auxiliary
Woodward 5462-532 Pressure Channel
Woodward 5462-533 Power Prefernce
Woodward 5462-578 High Volt P/S
Woodward 5462-581
Woodward 5462-584 DCS Motherboard
Woodward 5462-651 ANALOG 8CH 4-20MA INPUT
Woodward 5462-718 SPEED SENSOR
Woodward 5462-749 COPROCESSOR
Woodward 5462-750 SEC.POWER SUPPLY
Woodward 5462-753
Woodward 5462-756
Woodward 5462-757 DISCRETE INPUT
Woodward 5462-758 DISCRETE OUTPUT
Woodward 5462-762 SIO Card
Woodward 5462-893 CPU Card
Woodward 5462-896
Woodward 5462-916 FTC-DCS II
Woodward 5462-917
Woodward 5462-944 DPS3/DT
Woodward 5462-948 T/C Card-8 Channel
Woodward 5462-966 Speed Sensor/Analog In
Woodward 5463-033
Woodward 5463-034 POWER AUX.N.C.
Woodward 5463-089 CPU
Woodward 5463-120 cpu module
Woodward 5463-124 Sio
Woodward 5463-127 SIO
Woodward 5463-140 Master CPU
Woodward 5463-141 Master CO CPU
Woodward 5463-143 Aux Memory
Woodward 5463-154 MODULE ASSY-509 DISCREET I/O
Woodward 5463-178 CPU Card
Woodward 5463-190
Woodward 5463-191
Woodward 5463-193
Woodward 5463-306 CPU Interface
Woodward 5463-306 Interface Module
Woodward 5463-338 RTD Input
Woodward 5463-372 FINAL DRVR
Woodward 5463-373 Analog Input Position Fdbk
Woodward 5463-375 Analog Input Position Fdbk
Woodward 5463-384 Analog Output
Woodward 5463-388 8CH RTD A/I