| 詳細參數(shù) | |||
|---|---|---|---|
| 品牌 | Woodward | 型號 | 9907-838 |
| 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 | 數(shù)字調(diào)速器 |
| 工作電壓 | 220VAC | 產(chǎn)品認證 | UL |
| 環(huán)境溫度 | -25至65°C | 環(huán)境濕度 | 5至95%,非冷凝 |
| 加工定制 | 否 | 重量 | 0.43公斤 |
| 產(chǎn)地 | 日本 | ||
WOODWARD 9907-838
9907-838 內(nèi)部雖然沒有什么實際的繼電器、時間繼電器、計數(shù)器，但它通過程序（軟件）與系統(tǒng)內(nèi)存，這些器件卻實實在在地存在著。其數(shù)量之多是繼電器控制系統(tǒng)難以想象的。即使是小型的9907-838，內(nèi)部繼電器數(shù)都可以千計，時間繼電器、計數(shù)也以百計。而且，這些繼電器的接點可無限次地使用。PLC內(nèi)部邏輯器件之多，用戶用起來已不感到有什么限制。唯一考慮的只是入出點。而這個內(nèi)部入出點即使用得再多，也無關(guān)緊要。大型9907-838的控制點數(shù)可達萬點以上，哪有那么大的現(xiàn)實系統(tǒng)？若實在不夠，還可聯(lián)網(wǎng)進行控制，不受什么限制。9907-838的指令系統(tǒng)也非常豐富，可毫不困難地實現(xiàn)種種開關(guān)量，以及模擬量的控制。PLC還有存儲數(shù)據(jù)的內(nèi)存區(qū)，可存儲控制過程的所有要保存的信息?？傊?，由于9907-838功能之強，發(fā)揮其在控制系統(tǒng)的作用，所受的限制已不是9907-838本身，而是人們的想象力，或與其配套的其它硬件設(shè)施了。
Although there are no actual relays, time relays and counters in 9907-838, these devices actually exist through program (software) and system memory. The number of them is unimaginable for relay control system. Even for the small 9907-838, the number of internal relays can be thousands, and the time relays and counts can be hundreds. Moreover, the contacts of these relays can be used indefiniby. There are so many logic devices in PLC that users don't feel any restrictions when using it. The only consideration is the point of entry and exit. However, it doesn't matter how much this internal entry-exit point is used. The control points of large-scale
9907-838 can reach more than 10000 points. How can there be such a large real system? If it is not enough, it can also be networked for control without any restrictions. The instruction system of 9907-838 is also very rich, which can realize the control of various switching values and analog quantities without difficulty. PLC also has a memory area for storing data, which can store all the inbation to be saved in the control process. In short, due to the strong function of 9907-838 and its role in the control system, the limitation is not 9907-838 itself, but people's imagination or other supporting hardware facilities.
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