—————深圳长欣自动化设备有限公司———————————

*国外直接采购，正品行货，价格优惠，售后保修，型号齐全，优势库存。
*所有备件的质保期均为1年，经过专业测试认证。
*如果您需要订购产品超过1件，请与我们联系，我们可以为您提供折扣。
*我们仅采用顺丰快递方式递送备件。
*如果您发现其他供货商为相同产品提供更为低廉的价格，我们也愿意参照其价格向您提供进一步的折扣。
如果还有其他任何问题，请随时与我们联系。
*请让我们知道您有任何，备品，备件的需要，我们可以给您进一步的援助，我们等候您的询盘。
*长欣做到信誉，信任，信服。
*一样的产品，不一样的是价格与服务。
*您的选择，就是我们的前进的动力。

 
公司经销产品应用于：
 数控机械冶金、石油天然气、石油化工、化工、造纸印刷、纺织印染、机械、电子制造、汽车制造、烟草、塑胶机械、电力、水利、水处理/环保、市政工程、锅炉供暖、能源、输配电等行业。

 
 主营产品，优势供应，充足库存

1. Foxboro: I / a series system, FBM full series (field input / output module) sequential control Ladder logic control, accident recall processing, digital to analog conversion, input / output signal processing, data communication and processing, etc.

2. Westinghouse: 1c31 series DCS system, CPU, ovation system, WDPF system Spare parts for westation system.

3. Triconex: redundant fault-tolerant control system, modern fault-tolerant controller based on triple module redundancy (TMR) structure.
Emerson: various spare parts such as modules, cards and drives.

5. Xycom: I / O, VME board, processor, etc.

6. Bently: 3500 / 3300 system.

7. Rockwell: ICs system.

8. ABB: PM full series DCS system, IGCT high voltage inverter series, m, infi 90, etc.

Bailey: BRC series DCS system, etc.

9. Allen Bradley: 1756, 1785, 1771, 1746 full series systems, etc.

10. Honeywell: TK / TC / CC system, etc.

11. Reliance: 57c series, etc.

12. Schneider: 140 series processor, control card, power module, etc.

Modicon: spare parts of as series PLC system.

13. KUKA krc1 krc2 krc4 teaching pendant kcp200-130-547 controller ksd1-08 KSD1-16 KSD1-32 KSD1-64 KPS600

14. Motorola: mvme 162, mvme 167, mvme 1772, mvme 177 and other series.

15. Ge (General Electric): ic698 / ic697 full series PLC system, modules, cards, drivers and other spare parts.
Vmivme full series, sr469 / sr369 / sr750 series, etc

16. Bosch Rexroth: indramat, I / O module, PLC controller, drive module, etc.

18. Woodward: SPC valve position controller and peak150 digital controller.

 

对于顺序控制前面已介绍了使用步进指令或以转换为中心的方法来编程，这里主要介绍采用起保停电路编制梯形图的方法 。该方法可以按照一定的规律实现顺序控制，而且编制程序非常容易。起保停电路仅仅使用与触点与线圈有关的指令，任何一种PLC的指令系统都有这一类指令，因此它是适用于任意一种PLC的通用方法。

首先根据生产工艺要求编制出顺序功能图，如某生产过程的顺序功能图如1所示。

再根据顺序功能图编制梯形图。如图2为图1对应的梯形图。使用起保停电路编制梯形图的关键是找出启动条件和停止条件。如M0的启动条件是PLC运行时，M8002瞬间接通，使M0成为活动步，或在运行中，当M4为活动步时，如果X4动合触点闭合，则可转换到M0。M0的停止条件是M1成为活动步，因此用M1的动断触点接到M0的线圈回路中。用M0的动合触点实现自保持。如M1的启动条件是M0为活动步，且 X0动合触点闭合，则可转换到M1。M1的停止条件是M2成为活动步，因此用M2的动断触点接到M1的线圈回路中。用M1的动合触点自保持。其它各步的转换都是同样的道理。

 

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