| 詳細(xì)參數(shù) | |||
|---|---|---|---|
| 品牌 | NI | 型號(hào) | SCXI-1001 |
| 結(jié)構(gòu)形式 | 模塊式 | 安裝方式 | 控制室安裝 |
| LD指令處理器 | 硬PLC | 功能 | 4槽SCXI,機(jī)箱 |
| 工作電壓 | Vcc,5至,10V | 處理速度 | 580次讀取/秒 |
| 加工定制 | 否 | 產(chǎn)地 | 美國(guó) |
| 外形尺寸 | 1.2x6.8x8.0英寸 | ||
NI SCXI-1001
現(xiàn)代PLC一個(gè)顯著的特點(diǎn)就是具有通訊功能，目前主流的PLC一般都具有RS485（或RS232）通訊接口，以便連接編程設(shè)備、監(jiān)視器、打印機(jī)等外圍設(shè)備，或連接諸如變頻器、溫控儀等簡(jiǎn)單控制設(shè)備進(jìn)行簡(jiǎn)單的主從式通訊，實(shí)現(xiàn)“人一機(jī)”或“機(jī)—機(jī)”之間的對(duì)話。一些先進(jìn)的PLC上還具有工業(yè)網(wǎng)絡(luò)通訊接口，可以與其他的PLC或計(jì)算機(jī)相連，組成分布式工業(yè)控制系統(tǒng)，實(shí)現(xiàn)更大規(guī)模的控制，另外還可以與數(shù)據(jù)庫(kù)軟件相結(jié)合，實(shí)現(xiàn)控制與管理相結(jié)合的綜合控制。
Voltage, current, frequency, pressure, sound, light, temperature are the physical variables that are measured with respect to their changes with respect to time to obtain inbation.When voltage versus time graph is plotted we see curve with continuous values like sine waves.
These signals are more subjected to noise as they travel through the medium, these noises result in inbation loss in the signal. Analog to digital converter converts analog signal to digital signal by a process called sampling and quantization. Sound waves are converted to sequence of samples by the process SamplingExamples of analog signals:Conventional (old) transmitters, transducers convey data in analog mode.The signals include audio signals transmitted through wires, video signals broadcasted using older technology, radio signals, and analog watches.
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