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PLC可编程控制器的功能技术在不断的提高，应用领域也越来越大。今天的PLC在各行业都发挥着重要作用。尽管它的可靠性高、抗干扰能力强，若生产环境过于恶略也是会影响带程序活运算的错误。 因此小编在此简要介绍下PLC的应用特点及其工作环境，供大家学习。
一、PLC的应用特点
1.可靠性高，抗干扰能力强
高可靠性是电气控制设备的关键性能。PLC由于采用现代大规模集成电路技术，采用严格的生产工艺制造，内部电路采取了先进的抗干扰技术塑料工业网版权所有，具有很高的可靠性。使用PLC构成控制系统，和同等规模的继电接触器系统相比，电气接线及开关接点已减少到数百甚至数千分之一，故障也就大大降低。此外，PLC带有硬件故障自我检测功能金属加工网版权所有，出现故障时可及时发出警报信息。在应用软件中，应用者还可以编入外围器件的故障自诊断程序，使系统中除PLC以外的电路及设备也获得故障自诊断保护。这样，整个系统将极高的可靠性。
2.配套齐全，功能完善，适用性强
PLC发展到今天，已经形成了各种规模的系列化产品，可以用于各种规模的工业控制场合。除了逻辑处理功能以外，PLC大多具有完善的数据运算能力，可用于各种数字控制领域。多种多样的功能单元大量涌现搜企网，使PLC渗透到了位置控制、温度控制、CNC等各种工业控制中。加上PLC通信能力的增强及人机界面技术的发展，使用PLC组成各种控制系统变得非常容易。
3.易学易用，深受工程技术人员欢迎
PLC是面向工矿企业的工控设备。它接口容易，编程语言易于为工程技术人员接受。梯形图语言的图形符号与表达方式和继电器电路图相当接近，为不熟悉电子电路、不懂计算机原理和汇编语言的人从事工业控制打开了方便之门。
4.系统的设计，工作量小，维护方便，容易改造
PLC用存储逻辑代替接线逻辑，大大减少了控制设备外部的接线，使控制系统设计及建造的周期大为缩短，同时日常维护也变得容易起来，更重要的是使同一设备经过改变程序而改变生产过程成为可能。这特别适合多品种、小批量的生产场合。
二、工作环境
1)温度
PLC要求环境温度在0~55oC，安装时不能放在发热量大的元件下面，四周通风散热的空间应足够大。
2)湿度
为了保证PLC的绝缘性能，空气的相对湿度应小于85%(无凝露)。
3)震动
应使PLC远离强烈的震动源，防止振动频率为10~55Hz的频繁或连续振动。当使用环境不可避免震动时，必须采取减震措施塑料工业网，如采用减震胶等。
4)空气
避免有腐蚀和易燃的气体，例如氯化氢、硫化氢等。对于空气中有较多粉尘或腐蚀性气体的环境，可将PLC安装在封闭性较好的控制室或控制柜中。
5)电源
PLC对于电源线带来的干扰具有一定的抵制能力。在可靠性要求很高或电源干扰特别严重的环境中，可以安装一台带屏蔽层的隔离变压器，以减少设备与地之间的干扰。一般PLC都有直流24V输出提供给输入端金属加工网，当输入端使用外接直流电源时，应选用直流稳压电源。因为普通的整流滤波电源，由于纹波的影响，容易使PLC接收到错误信息。 YASKAWA CACR-IR010101F/B
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TOYODA OB32
