ICS TRIPLEX T8451可編程控制模塊
Device Addr(Hex)這里就是設置從機地址的參數，主機在讀寫(xiě)數據的時(shí)候都需要設置從機地址為這個(gè)數據，否則讀寫(xiě)數據會(huì )出錯，然后設置好發(fā)送周期（根據主機發(fā)送數據頻率設置，由于我們這里主機是手動(dòng)發(fā)送數據，所以可以把周期設置長(cháng)一點(diǎn)），點(diǎn)擊自動(dòng)發(fā)送，這樣軟件就會(huì )周期性的調用VII_SlaveReadBytes()函數來(lái)獲取適配器接收到的數據，如果沒(méi)接收到數據，這個(gè)函數會(huì )返回0字節數據。
ICS TRIPLEX T8451可編程控制模塊這些都做好后，從機就等待主機發(fā)送數據了，如果接收到數據后就在PC調用VII_SlaveReadBytes()函數的時(shí)候將數據返回，現在主機做如下設置并點(diǎn)擊發(fā)送，從機界面就能顯示接收到的數據：
從機發(fā)送數據工作流程：
從機發(fā)送數據需要先將數據寫(xiě)入適配器內部緩沖區中，然后主機產(chǎn)生時(shí)鐘信號后，從機就會(huì )自動(dòng)把數據發(fā)送出去，所以在從機設置設置好相關(guān)參數后，設置好要發(fā)送的數據，然后點(diǎn)擊發(fā)送，數據就發(fā)送到適配器內部緩沖區了，然后主機就可以將數據從從機讀回來(lái)。
從機發(fā)送數據：
主機讀取數據：
后記：
從機模式在協(xié)助主機程序開(kāi)發(fā)時(shí)有很大的用處，在不確定主機控制對象是否正常工作或者主機控制程序是否正常工作的時(shí)候可以利用從機來(lái)驗證主機控制程序，這樣可以加速定位問(wèn)題所在。
I2C通信的時(shí)候，在同一個(gè)總線(xiàn)上可以?huà)於鄠€(gè)設備，主機和從機之間的數據傳輸都是通過(guò)地址來(lái)尋址的，所以在調試的時(shí)候一定要注意主機和從機的地址必須匹配，否則會(huì )出現無(wú)法正常通信的問(wèn)題。ACE-MINI 的優(yōu)點(diǎn)
針對所有配備單一 PCI 插槽的 Mini-ITX 主板而設計
機箱搭載 110-220V ATX 電源供應器
PCI 游戲 I/O 卡 (ACE-B2019/A)
ACE-MINI-A 的功能（具備 ACE-B2019A）
In some cases, a single switch can not meet the needs of the site, so the switch stacking technology appears. Multiple switches are combined to work together, which can provide more ports in a limited space. What's the point of switch stacking? Next, feisong industrial exchange will analyze it for you.
Multiple switches are stacked to form a stacking unit. There is a parameter of "maximum stackable number" in the performance index of stackable switches, which refers to the maximum number of switches that can be stacked in a stacking unit and represents the maximum port density that can be provided in a stacking unit.
Mainstream switches in the market can be divided into stackable and non stackable tyes. Among the switches that can be stacked, there are virtual stacking and real stacking.
The so-called virtual stack is actually a cascade between switches. Switches are not stacked through dedicated stacking modules and cables, but through fast Ethernet ports or Giga Ethernet ports. In fact, this is a disguised cascade.
Virtual stacked multiple industrial switches can be managed as a logical device in the network,
