HONEYWELL 51410069-275接口模塊，使用方法
正航系列PLC的CPU單元均自帶一個(gè)DC24V電源，該電源輸出電流可達(dá)400mA。如果該DC24V電源連接設(shè)備超出了額定范圍或接了感性設(shè)備，有可能影響PLC的正常工作。
3）來(lái)自不規(guī)范接地的干擾
PLC控制系統(tǒng)的地線包括系統(tǒng)地、屏蔽地、交流地和保護(hù)地等。而不規(guī)范的接地就有可能對(duì)各個(gè)接地點(diǎn)造成不同的地電位差，引起地環(huán)路電流以及信號(hào)共模干擾，影響系統(tǒng)正常工作。
HONEYWELL 51410069-275接口模塊4）來(lái)自相鄰變頻器的干擾
在PLC的實(shí)際應(yīng)用中，經(jīng)常與各類型號(hào)的變頻器配合使用，由PLC的輸出控制變頻器的運(yùn)行。變頻器起動(dòng)機(jī)運(yùn)行過(guò)程中產(chǎn)生諧波對(duì)電網(wǎng)產(chǎn)生傳導(dǎo)干擾，引起電網(wǎng)電壓畸變，影響電網(wǎng)的供電質(zhì)量；變頻器的輸出會(huì)產(chǎn)生較強(qiáng)的電磁輻射干擾，影響系統(tǒng)正常工作。
三、解決方案
通過(guò)下面幾種措施，可以有效的抑制各類干擾： 1）使用隔離變壓器等對(duì)進(jìn)PLC的AC220V電源隔離。盡量不要使用從AC380V某一相拉出來(lái)的220V電源。如果現(xiàn)場(chǎng)存在大
電機(jī)
、大功率變頻器等，盡量與這些設(shè)備使用不同路的電源。隔離變壓器可以將絕大部分的傳導(dǎo)干擾阻隔在隔離變壓器之前，同時(shí)還兼有電源電壓變換的作用采用24G接到COM端（Source）的連接方法，將按鈕的兩棵線分別連到24V端子和X0端子。（注：在這種接法的電路里，所選接近開(kāi)關(guān)必須是PNP的）。
按動(dòng)按鈕SB1后，Y0輸出，20秒后，Y0關(guān)斷。
也可打開(kāi)調(diào)試菜單中的在線監(jiān)視窗口，實(shí)時(shí)監(jiān)視PLC的運(yùn)行狀態(tài)，這時(shí)發(fā)現(xiàn)PLC上的COMM通訊指示燈閃爍。也許由于習(xí)慣了三菱編程，在使用海為PLC編程中逐步地發(fā)現(xiàn)海為PLC編程略有不足，比如：
1、指令輸入對(duì)習(xí)慣鍵盤操作的人不是太方便，能否對(duì)一些常用指令支持鍵盤操作。
2、不支持手持編程器是不是有些不方便。
although technology is indeed part of most industrial operations today, the hardware, software and protocols used are very different from those we are used to at the enterprise or consumer level. At the enterprise level, we often deal with agreements strongly advocated by organizations such as IEEE and ITU. However, it is these standard organizations that promote manufacturing protocols and platforms: manufacturing enterprise solutions agreement (MESA) and International Electrotechnical Commission (IEC). Therefore, one of the main challenges facing the industrial Internet of things is to deal with this aspect: transfer the data obtained from the industrial system using its own unique application platform and standard protocol to the enterprise system.
Take a look at the eight main points to consider before you start an industrial Internet of things project.
data collection and analysis
Although almost all Internet of things projects need to collect and analyze big data, each deployed industrial Internet of things has unique characteristics. Data types, collection methods and analysis may depend on sensors and software deployed in highly complex and customized machines and equipment.
