ICS TRIPLEX T8451可編程控制模塊
Device Addr(Hex)這里就是設(shè)置從機地址的參數(shù)，主機在讀寫數(shù)據(jù)的時候都需要設(shè)置從機地址為這個數(shù)據(jù)，否則讀寫數(shù)據(jù)會出錯，然后設(shè)置好發(fā)送周期（根據(jù)主機發(fā)送數(shù)據(jù)頻率設(shè)置，由于我們這里主機是手動發(fā)送數(shù)據(jù)，所以可以把周期設(shè)置長一點），點擊自動發(fā)送，這樣軟件就會周期性的調(diào)用VII_SlaveReadBytes()函數(shù)來獲取適配器接收到的數(shù)據(jù)，如果沒接收到數(shù)據(jù)，這個函數(shù)會返回0字節(jié)數(shù)據(jù)。
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(shù)據(jù)了，如果接收到數(shù)據(jù)后就在PC調(diào)用VII_SlaveReadBytes()函數(shù)的時候?qū)?shù)據(jù)返回，現(xiàn)在主機做如下設(shè)置并點擊發(fā)送，從機界面就能顯示接收到的數(shù)據(jù)：
從機發(fā)送數(shù)據(jù)工作流程：
從機發(fā)送數(shù)據(jù)需要先將數(shù)據(jù)寫入適配器內(nèi)部緩沖區(qū)中，然后主機產(chǎn)生時鐘信號后，從機就會自動把數(shù)據(jù)發(fā)送出去，所以在從機設(shè)置設(shè)置好相關(guān)參數(shù)后，設(shè)置好要發(fā)送的數(shù)據(jù)，然后點擊發(fā)送，數(shù)據(jù)就發(fā)送到適配器內(nèi)部緩沖區(qū)了，然后主機就可以將數(shù)據(jù)從從機讀回來。
從機發(fā)送數(shù)據(jù)：
主機讀取數(shù)據(jù)：
后記：
從機模式在協(xié)助主機程序開發(fā)時有很大的用處，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候可以利用從機來驗證主機控制程序，這樣可以加速定位問題所在。
I2C通信的時候，在同一個總線上可以掛多個設(shè)備，主機和從機之間的數(shù)據(jù)傳輸都是通過地址來尋址的，所以在調(diào)試的時候一定要注意主機和從機的地址必須匹配，否則會出現(xiàn)無法正常通信的問題。ACE-MINI 的優(yōu)點
針對所有配備單一 PCI 插槽的 Mini-ITX 主板而設(shè)計
機箱搭載 110-220V ATX 電源供應(yīng)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,
